Installation and operation manual. Daikin/1. VRV/2...Table of Contents Installation and operation...

Installation and operation manualVRV IV compressor unit for indoor installation English

Installation and operationmanual

VRV IV compressor unit for indoor installation

RKXYQ5T7Y1B

3P397286-2BCE - D

ECLA

RATIO

N-OF-C

ONFO

RMITY

CE - D

ECLA

RACIO

N-DE-C

ONFO

RMIDA

DCE

- DEC

LARA

ÇÃO-

DE-CO

NFOR

MIDA

DECE

- ERK

LÆRIN

G OM-

SAMS

VAR

CE - I

ZJAV

A-O-US

KLAĐ

ENOS

TICE

- IZJ

AVA O

SKLA

DNOS

TICE

- ATIT

IKTIES

-DEKL

ARAC

IJACE

- KON

FORM

ITÄTS

ERKL

ÄRUN

GCE

- DICH

IARAZ

IONE-D

I-CON

FORM

ITACE

- ЗАЯ

ВЛЕН

ИЕ-О

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ВЕТС

ТВИИ

CE - I

LMOIT

US-YH

DENM

UKAIS

UUDE

STA

CE - M

EGFE

LELŐ

SÉGI-

NYILA

TKOZ

ATCE

- VAS

TAVU

SDEK

LARA

TSIOO

NCE

- ATB

ILSTĪB

AS-DE

KLAR

ĀCIJA

CE - D

ECLA

RATIO

N-DE-C

ONFO

RMITE

CE - Δ

HΛΩΣ

Η ΣΥΜ

ΜΟΡΦ

ΩΣΗΣ

CE - O

VERE

NSST

EMME

LSES

ERKL

ÆRING

CE - P

ROHL

ÁŠEN

Í-O-SH

ODĚ

CE - D

EKLA

RACJ

A-ZGO

DNOŚ

CICE

- ДЕК

ЛАРА

ЦИЯ-З

А-СЪО

ТВЕТ

СТВИ

ЕCE

- VYH

LÁSE

NIE-ZH

ODY

CE - C

ONFO

RMITE

ITSVE

RKLA

RING

CE - F

ÖRSÄ

KRAN

-OM-

ÖVER

ENST

ÄMME

LSE

CE - D

ECLA

RAŢIE

-DE-CO

NFOR

MITA

TECE

- UYG

UNLU

K-BEY

ANI

Dai

kin

Euro

pe N

.V.

01

02

03

04

05

06

07

08

decla

res un

der it

s sole

resp

onsib

ility th

at the

air c

ondit

ioning

mod

els to

which

this d

eclar

ation

relat

es:

erklär

t auf

seine

allein

ige Ve

rantwo

rtung

daß d

ie Mo

delle

der K

limag

eräte

für di

e dies

e Erkl

ärung

bestim

mt ist

:dé

clare

sous

sa se

ule re

spon

sabili

té qu

e les

appa

reils d

'air co

nditio

nné v

isés p

ar la

prése

nte dé

clarat

ion:

verkl

aart h

ierbij

op ei

gen e

xclus

ieve v

erantw

oorde

lijkhe

id da

t de a

ircon

dition

ing un

its wa

arop d

eze v

erklar

ing be

trekki

ng he

eft:

decla

ra ba

ja su

única

resp

onsa

bilida

d que

los m

odelo

s de a

ire ac

ondic

ionad

o a lo

s cua

les ha

ce re

feren

cia la

decla

ración

:dic

hiara

sotto

sua r

espo

nsab

ilità ch

e i co

ndizio

nator

i mod

ello a

cui è

riferi

ta qu

esta

dichia

razion

e:δη

λώνει

με απ

οκλει

στική

της ε

υθύν

η ότι τ

α μον

τέλα τ

ων κλ

ιματισ

τικών

συσκ

ευών σ

τα οπ

οία αν

αφέρε

ται η

παρο

ύσα δ

ήλωσ

η:de

clara

sob s

ua ex

clusiv

a res

pons

abilid

ade q

ue os

mod

elos d

e ar c

ondic

ionad

o a qu

e esta

decla

ração

se re

fere:

09

10

11

12

13

14

15

16

заявл

яет, и

сключ

итель

но по

д сво

ю отв

етстве

ннос

ть, чт

о мод

ели к

онди

цион

еров

возд

уха, к

котор

ым от

носи

тся на

стоящ

ее за

явле

ние:

erklæ

rer un

der e

nean

svar, a

t klim

aanlæ

gmod

ellerne

, som

denn

e dek

larati

on ve

drører

:de

klarer

ar i e

gens

kap a

v huv

udan

svarig

, att l

uftko

nditio

nerin

gsmo

deller

na so

m be

rörs a

v den

na de

klarat

ion in

nebä

r att:

erklæ

rer et

fullst

endig

ansva

r for a

t de l

uftko

ndisjo

nerin

gsmo

deller

som

berør

es av

denn

e dek

laras

jon, in

nebæ

rer at

:ilm

oittaa

yksin

omaa

n oma

lla va

stuulla

an, e

ttä tä

män i

lmoit

ukse

n tark

oittam

at ilm

astoi

ntilait

teide

n malli

t:pro

hlašu

je ve

své p

lné od

pově

dnos

ti, že

mod

ely kli

matiza

ce, k

nimž

se to

to pro

hláše

ní vzt

ahuje

:izja

vljuje

pod i

sključ

ivo vla

stitom

odgo

vorno

šću da

su m

odeli

klima u

ređaja

na ko

je se

ova i

zjava

odno

si:tel

jes fe

lelőssé

ge tu

datáb

an kij

elenti

, hog

y a klí

mabe

rende

zés m

odelle

k, me

lyekre

e ny

ilatko

zat v

onatk

ozik:

17

18

19

20

21

22

23

24

25

dekla

ruje n

a włas

ną i w

yłączn

ą odp

owied

zialno

ść, że

mod

ele kli

matyz

atorów

, któr

ych do

tyczy

niniejs

za de

klarac

ja:de

clară

pe pr

oprie

răsp

unde

re că

apara

tele d

e aer

cond

iţiona

t la ca

re se

refer

ă ace

astă

decla

raţie:

z vso

odgo

vorno

stjo izj

avlja,

da so

mod

eli klim

atskih

napra

v, na

kater

e se i

zjava

nana

ša:

kinnit

ab om

a täie

likul va

stutus

el, et

käes

oleva

dekla

ratsio

oni a

lla ku

uluva

d kliim

asea

dmete

mud

elid:

декла

рира

на св

оя от

говор

ност,

че мо

дели

те кли

матич

на ин

стала

ция,

за кои

то се

отна

ся та

зи де

клара

ция:

visišk

a sav

o atsa

komy

be sk

elbia,

kad o

ro ko

ndicio

navim

o prie

taisų

mod

eliai, k

uriem

s yra

taiko

ma ši

dekla

racija:

ar piln

u atbi

ldību

apliec

ina, k

a tālā

k uzsk

aitīto

mod

eļu ga

isa ko

ndicio

nētāj

i, uz k

uriem

attie

cas š

ī dek

larāc

ija:vyh

lasuje

na vla

stnú z

odpo

vedn

osť, ž

e tiet

o klim

atiza

čné m

odely

, na k

toré s

a vzťa

huje

toto v

yhlás

enie:

tamam

en ke

ndi so

rumlulu

ǧund

a olm

ak üz

ere bu

bildir

inin ilg

ili oldu

ǧu kli

ma m

odelle

rinin

aşaǧ

ıdaki g

ibi old

uǧun

u bey

an ed

er:

RD

XYQ

5T7V

1B*,

RK

XYQ

5T7Y

1B*,

* = ,

, 1,

2, 3,

…, 9

01 02 03 04 05 06 07

are in

confo

rmity

with t

he fo

llowing

stan

dard(

s) or

other

norm

ative

docu

ment(

s), pr

ovide

d tha

t thes

e are

used

in ac

corda

nce w

ith ou

r instr

uctio

ns:

der/d

en fo

lgend

en No

rm(en

) ode

r eine

m an

deren

Norm

doku

ment

oder

-doku

mente

n ents

prich

t/ents

prech

en, u

nter d

er Vo

rausse

tzung

, daß

sie ge

mäß

unse

ren An

weisu

ngen

eing

esetz

t werd

en:

sont

confo

rmes

à la/

aux n

orme(s

) ou a

utre(s

) doc

umen

t(s) n

ormati

f(s), p

our a

utant

qu'ils

soien

t utilis

és co

nform

émen

t à no

s instr

uctio

ns:

confo

rm de

volge

nde n

orm(en

) of é

én of

mee

r and

ere bi

nden

de do

cume

nten z

ijn, op

voorw

aarde

dat z

e word

en ge

bruikt

overe

enko

mstig

onze

instru

cties:

están

en co

nform

idad c

on la

(s) sig

uiente

(s) no

rma(s

) u ot

ro(s)

docu

mento

(s) no

rmati

vo(s)

, siem

pre qu

e sea

n utiliz

ados

de ac

uerdo

con n

uestr

asins

trucci

ones

:so

no co

nform

i al(i)

segu

ente(

i) stan

dard(

s) o a

ltro(i)

docu

mento

(i) a c

aratte

re no

rmati

vo, a

patto

che v

enga

no us

ati in

confo

rmità

alle

nostr

e istr

uzion

i:είν

αι σύ

μφων

α με τ

ο(α) α

κόλο

υθο(α

) πρό

τυπο(α

) ή άλ

λο έγ

γραφ

ο(α) κ

ανον

ισμών

, υπό

την π

ροϋπ

όθεσ

η ότι χ

ρησιμ

οποιο

ύνται

σύμφ

ωνα μ

ε τις ο

δηγίε

ς μας

:

08 09 10 11 12 13 14 15

estão

em co

nform

idade

com

a(s) s

eguin

te(s)

norm

a(s) o

u outr

o(s) d

ocum

ento(

s) no

rmati

vo(s)

, des

de qu

e este

s seja

m uti

lizado

s de

acord

o com

as no

ssas in

struç

ões:

соотв

етству

ют сл

едую

щим с

танда

ртам и

ли др

угим н

орма

тивны

м доку

мента

м, пр

и усл

овии

их ис

поль

зован

ия со

гласн

о наш

им ин

струкц

иям:

overh

older

følge

nde s

tanda

rd(er)

eller

ande

t/and

re ret

nings

given

de do

kume

nt(er)

, forud

sat a

t diss

e anv

ende

s i he

nhold

til vo

re ins

trukse

r:res

pektiv

e utru

stning

är ut

förd i

övere

nsstä

mmels

e med

och f

öljer fö

ljande

stan

dard(

er) el

ler an

dra no

rmgiv

ande

doku

ment,

unde

r förut

sättn

ing at

tan

vänd

ning s

ker i

övere

nsstä

mmels

e med

våra

instru

ktione

r:res

pektiv

e utst

yr er

i ove

rensst

emme

lse m

ed fø

lgend

e stan

dard(

er) el

ler an

dre no

rmgiv

ende

doku

ment(

er), u

nder

foruts

setni

ng av

at di

sse br

ukes

ihe

nhold

til vå

re ins

trukse

r:va

staav

at se

uraav

ien st

anda

rdien

ja m

uiden

ohjee

llisten

doku

mentt

ien va

atimu

ksia e

dellyt

täen,

että n

iitä kä

ytetää

n ohje

idemm

e muk

aises

ti:za

před

pokla

du, ž

e jso

u vyu

žíván

y v so

uladu

s na

šimi p

okyn

y, od

povíd

ají ná

sledu

jícím

norm

ám ne

bo no

rmati

vním

doku

mentů

m:u s

kladu

sa sli

jedeć

im st

anda

rdom(

ima)

ili drug

im no

rmati

vnim

doku

mento

m(im

a), uz

uvjet

da se

oni ko

riste

u skla

du s

našim

uputa

ma:

16 17 18 19 20 21 22 23 24 25

megfe

lelnek

az al

ábbi

szabv

ány(o

k)nak

vagy

egyé

b irán

yadó

doku

mentu

m(ok

)nak,

ha az

okat

előírá

s sze

rint h

aszn

álják:

spełn

iają wy

mogi

nastę

pując

ych no

rm i in

nych

doku

mentó

w norm

alizac

yjnych

, pod

warun

kiem

że uż

ywan

e są z

godn

ie z n

aszym

i instr

ukcja

mi:

sunt

în co

nform

itate

cu ur

mător

ul (ur

mătoa

rele)

stand

ard(e)

sau a

lt(e) d

ocum

ent(e

) norm

ativ(e

), cu c

ondiţ

ia ca

aces

tea să

fie ut

ilizate

în co

nform

itate

cuins

trucţiu

nile no

astre

:skl

adni

z nas

lednjim

i stan

dardi

in dr

ugim

i norm

ativi,

pod p

ogoje

m, da

se up

orablja

jo v s

kladu

z na

šimi n

avod

ili:on

vasta

vuse

s järgm

is(t)e

stan

dardi

(te)ga

või te

iste no

rmati

ivsete

doku

menti

dega

, kui

neid

kasu

tatak

se va

stava

lt meie

juhe

ndite

le:съ

ответс

тват н

а сле

дните

стан

дарти

или д

руги

норм

ативн

и доку

менти

, при

усло

вие,

че се

изпо

лзва

т съгл

асно

наши

те ин

струкц

ии:

atitin

ka že

miau

nurod

ytus s

tanda

rtus ir

(arba

) kitu

s norm

inius d

okum

entus

su są

lyga,

kad y

ra na

udoja

mi pa

gal m

ūsų n

urody

mus:

tad, ja

lietot

i atbi

lstoši r

ažotā

ja no

rādīju

miem

, atbi

lst se

kojoš

iem st

anda

rtiem

un cit

iem no

rmatī

viem

doku

menti

em:

sú v

zhod

e s na

sledo

vnou

(ými) n

ormou

(ami) a

lebo i

ným(

i) norm

atívn

ym(i)

doku

mento

m(am

i), za

pred

pokla

du, ž

e sa p

oužív

ajú v

súlad

e s na

šimná

vodo

m:ürü

nün,

talim

atları

mıza

göre

kullan

ılmas

ı koş

uluyla

aşağ

ıdaki s

tanda

rtlar v

e norm

belirt

en be

lgeler

le uy

umlud

ur:

EN

6033

5-2-

40,

01 02 03 04 05 06 07 08 09

follow

ing th

e prov

isions

of:

gemä

ß den

Vorsc

hrifte

n der:

confo

rmém

ent a

ux st

ipulat

ions d

es:

overe

enko

mstig

de be

paling

en va

n:sig

uiend

o las

disp

osicio

nes d

e:se

cond

o le p

rescri

zioni

per:

με τήρ

ηση τ

ων δι

ατάξεω

ν των

:de

acord

o com

o pre

visto

em:

в соо

тветст

вии с

поло

жени

ями:

10 11 12 13 14 15 16 17 18

unde

r iagtt

agels

e af b

estem

melse

rne i:

enligt

villko

ren i:

gitt i

henh

old til

beste

mmels

ene i

:no

udatt

aen m

ääräy

ksiä:

za do

držen

í usta

nove

ní pře

dpisu

:pre

ma od

redba

ma:

köve

ti a(z)

:zg

odnie

z po

stano

wienia

mi Dy

rektyw

:în

urma p

reved

erilor

:

19 20 21 22 23 24 25

ob up

oštev

anju

določ

b:va

stava

lt nõu

etele:

след

вайки

клау

зите н

а:laik

antis

nuos

tatų,

patei

kiamų

:iev

ērojot

pras

ības,

kas n

oteikta

s:od

ržiav

ajúc u

stano

venia

:bu

nun k

oşulla

rına u

ygun

olara

k:

Mac

hine

ry 2

006/

42/E

CE

lect

rom

agne

tic C

ompa

tibili

ty 2

004/

108/

EC

** *

01 02 03 04 05 06 07 08 09

Direc

tives,

as am

ende

d.Dir

ektive

n, ge

mäß Ä

nderu

ng.

Direc

tives,

telles

que m

odifié

es.

Richtl

ijnen,

zoals

geam

ende

erd.

Direc

tivas,

segú

n lo e

nmen

dado

.Dir

ettive

, com

e da m

odific

a.Οδ

ηγιών

, όπω

ς έχο

υν τρ

οποπ

οιηθεί

.Dir

ectiva

s, co

nform

e alte

ração

em.

Дире

ктив с

о все

ми по

прав

ками.

10 11 12 13 14 15 16 17 18

Direk

tiver, m

ed se

nere

ændri

nger.

Direk

tiv, m

ed fö

retag

na än

dring

ar.Dir

ektive

r, med

foret

atte e

ndrin

ger.

Direk

tiivejä

, sella

isina k

uin ne

ovat

muute

ttuina

.v p

latné

m zn

ění.

Smjer

nice,

kako

je izm

ijenjen

o.irá

nyelv

(ek) é

s mód

osítá

saik r

ende

lkezé

seit.

z póź

niejsz

ymi p

opraw

kami

.Dir

ective

lor, c

u ame

ndam

entel

e res

pectiv

e.

19 20 21 22 23 24 25

Direk

tive z

vsemi

sprem

emba

mi.

Direk

tiivid

koos

muu

datus

tega.

Дире

ктиви

, с те

хните

изме

нени

я.Dir

ektyv

ose s

u pap

ildyma

is.Dir

ektīv

ās un

to pa

pildinā

jumos

.Sm

ernice

, v pl

atnom

znen

í.De

ǧiştiri

lmiş h

alleriy

le Yö

netm

elikler

.

01 No

te*

02 Hi

nweis

*

03 Re

marqu

e*

04 Be

merk*

05 No

ta*

as se

t out

in <A

> and

judg

ed po

sitive

ly by ac

cordi

ng to

the C

ertific

ate <C

>.wie

in <A

> aufg

eführt

und v

on pos

itivbe

urteilt

gemä

ß Zert

ifikat

<C>.

tel qu

e défi

ni da

ns <A

> et é

valué

positi

veme

nt pa

r 

confo

rmém

ent a

u Cert

ificat

<C>.

zoals

verm

eld in

<A> e

n pos

itief b

eoord

eeld

door



overe

enko

mstig

Certif

icaat

<C>.

como

se es

tablec

e en <

A> y

es va

lorad

opo

sitiva

mente

por de

acue

rdo co

n el

Certif

icado

<C>.

06 No

ta*

07 Ση

μείω

ση*

08 No

ta*

09 Пр

имеч

ание

*

10 Be

mærk*

deline

ato ne

l <A>

e giu

dicato

positi

vame

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Table of Contents

Installation and operation manual

3RKXYQ5T7Y1BVRV IV compressor unit for indoor installation4P408443-1 – 2015.07

Table of Contents

1 About the documentation 41.1 About this document.................................................................. 4

For the installer 4

2 About the box 42.1 Compressor unit ........................................................................ 4

2.1.1 To remove the accessories from the compressor unit 42.1.2 To remove the transportation stay .............................. 4

3 About the units and options 53.1 About the compressor unit and heat exchanger unit................. 53.2 System layout............................................................................ 5

4 Preparation 54.1 Preparing installation site .......................................................... 5

4.1.1 Installation site requirements of the compressor unit.. 54.2 Preparing refrigerant piping....................................................... 5

4.2.1 Refrigerant piping requirements.................................. 54.2.2 Refrigerant piping material.......................................... 54.2.3 To select the piping size ............................................. 64.2.4 To select refrigerant branch kits.................................. 6

4.3 Preparing electrical wiring ......................................................... 64.3.1 Safety device requirements ........................................ 6

5 Installation 75.1 Opening the units ...................................................................... 7

5.1.1 To open the compressor unit ...................................... 75.2 Mounting the compressor unit ................................................... 7

5.2.1 Guidelines when installing the compressor unit.......... 75.3 Connecting the refrigerant piping .............................................. 7

5.3.1 Using the stop valve and service port ......................... 75.3.2 To remove the pinched pipes...................................... 85.3.3 To connect the refrigerant piping to the compressor

unit .............................................................................. 95.4 Checking the refrigerant piping ................................................. 10

5.4.1 About checking the refrigerant piping ......................... 105.4.2 Checking refrigerant piping: General guidelines ......... 105.4.3 Checking refrigerant piping: Setup.............................. 105.4.4 To perform a leak test ................................................. 115.4.5 To perform vacuum drying .......................................... 11

5.5 To insulate the refrigerant piping............................................... 115.6 Charging refrigerant .................................................................. 11

5.6.1 Precautions when charging refrigerant ....................... 115.6.2 To determine the additional refrigerant amount .......... 125.6.3 To charge refrigerant .................................................. 125.6.4 Error codes when charging refrigerant........................ 135.6.5 To fix the fluorinated greenhouse gases label ............ 13

5.7 Connecting the electrical wiring................................................. 135.7.1 Field wiring: Overview................................................. 135.7.2 Guidelines when connecting the electrical wiring ....... 145.7.3 To connect the electrical wiring on the compressor

unit .............................................................................. 145.8 Finishing the compressor unit installation ................................. 15

5.8.1 To finish the transmission wiring................................. 15

6 Configuration 156.1 Making field settings.................................................................. 15

6.1.1 About making field settings ......................................... 156.1.2 To access the field setting components...................... 156.1.3 Field setting components ............................................ 156.1.4 To access mode 1 or 2 ............................................... 166.1.5 To use mode 1 (and default situation) ........................ 166.1.6 To use mode 2 ............................................................ 176.1.7 Mode 1 (and default situation): Monitoring settings .... 17

6.1.8 Mode 2: Field settings.................................................. 186.1.9 To connect the PC configurator to the compressor

unit ............................................................................... 20

7 Commissioning 207.1 Precautions when commissioning .............................................. 207.2 Checklist before commissioning................................................. 207.3 Checklist during commissioning ................................................. 21

7.3.1 About test run............................................................... 217.3.2 To perform a test run (7-LEDs display)........................ 217.3.3 Correcting after abnormal completion of the test run... 227.3.4 Operating the unit ........................................................ 22

8 Troubleshooting 228.1 Solving problems based on error codes..................................... 22

8.1.1 Error codes: Overview ................................................. 22

9 Technical data 249.1 Piping diagram: Compressor unit and heat exchanger unit ....... 249.2 Wiring diagram: Compressor unit ............................................... 24

For the user 25

10 About the system 2510.1 System layout............................................................................. 25

11 User interface 25

12 Operation 2512.1 Operation range ......................................................................... 2512.2 Operating the system ................................................................. 26

12.2.1 About operating the system ......................................... 2612.2.2 About cooling, heating, fan only, and automatic

operation ...................................................................... 2612.2.3 About the heating operation......................................... 2612.2.4 To operate the system (WITHOUT cool/heat

changeover remote control switch) .............................. 2612.2.5 To operate the system (WITH cool/heat changeover

remote control switch).................................................. 2612.3 Using the dry program................................................................ 27

12.3.1 About the dry program ................................................. 2712.3.2 To use the dry program (WITHOUT cool/heat

changeover remote control switch) .............................. 2712.3.3 To use the dry program (WITH cool/heat changeover

remote control switch).................................................. 2712.4 Adjusting the air flow direction.................................................... 27

12.4.1 About the air flow flap .................................................. 2712.5 Setting the master user interface ............................................... 27

12.5.1 About setting the master user interface ....................... 2712.5.2 To designate the master user interface (VRV DX)....... 28

13 Maintenance and service 2813.1 After-sales service and warranty ................................................ 28

13.1.1 Warranty period ........................................................... 2813.1.2 Recommended maintenance and inspection............... 28

14 Troubleshooting 2814.1 Error codes: Overview................................................................ 2914.2 Symptoms that are not air conditioner troubles.......................... 30

14.2.1 Symptom: The system does not operate ..................... 3014.2.2 Symptom: Cool/Heat cannot be changed over ............ 3014.2.3 Symptom: Fan operation is possible, but cooling and

heating do not work...................................................... 3014.2.4 Symptom: The fan strength does not correspond to

the setting .................................................................... 3014.2.5 Symptom: The fan direction does not correspond to

the setting .................................................................... 3014.2.6 Symptom: White mist comes out of a unit (Indoor

unit) .............................................................................. 3014.2.7 Symptom: White mist comes out of a unit (Indoor

unit, heat exchanger unit) ............................................ 30

1 About the documentation


4RKXYQ5T7Y1B

VRV IV compressor unit for indoor installation4P408443-1 – 2015.07

14.2.8 Symptom: The user interface display reads "U4" or"U5" and stops, but then restarts after a few minutes. 30

14.2.9 Symptom: Noise of air conditioners (Indoor unit, heatexchanger unit) ........................................................... 30

14.2.10 Symptom: Noise of air conditioners (Indoor unit,compressor unit, heat exchanger unit)........................ 31

14.2.11 Symptom: Noise of air conditioners (compressorunit, heat exchanger unit) ........................................... 31

14.2.12 Symptom: Dust comes out of the heat exchangerunit .............................................................................. 31

14.2.13 Symptom: The units can give off odours..................... 3114.2.14 Symptom: The heat exchanger unit fan does not spin 3114.2.15 Symptom: The display shows "88".............................. 3114.2.16 Symptom: The compressor in the compressor unit

does not stop after a short heating operation ............. 3114.2.17 Symptom: The inside of an compressor unit is warm

even when the unit has stopped ................................. 3114.2.18 Symptom: Hot air can be felt when the indoor unit is

stopped ....................................................................... 31

15 Relocation 31

16 Disposal 31

1 About the documentation

1.1 About this documentTarget audienceAuthorised installers + end users

INFORMATION

This appliance is intended to be used by expert or trainedusers in shops, in light industry and on farms, or forcommercial use by lay persons.

Documentation setThis document is part of a documentation set. The complete setconsists of:

▪ General safety precautions:

▪ Safety instructions that you must read before installing

▪ Format: Paper (in the accessory bag of the compressor unit)

▪ Compressor unit installation and operation manual:

▪ Installation and operation instructions

▪ Format: Paper (in the accessory bag of the compressor unit)

▪ Heat exchanger unit installation manual:

▪ Installation instructions

▪ Format: Paper (in the accessory bag of the heat exchangerunit)

▪ Installer and user reference guide:

▪ Preparation of the installation, technical specifications,reference data,…

▪ Detailed step-by-step instructions and background informationfor basic and advanced usage

▪ Format: Digital files on http://www.daikineurope.com/support-and-manuals/product-information/

Latest revisions of the supplied documentation may be available onthe regional Daikin website or via your dealer.

The original documentation is written in English. All other languagesare translations.

For the installer

2 About the box

2.1 Compressor unit

2.1.1 To remove the accessories from thecompressor unit

1 Remove the accessories (part 1).

a1×

b1×

c1×

d1×

e1×

f3×

2 Remove the service cover. See "5.1.1 To open the compressorunit" on page 7.

3 Remove the accessories (part 2).

1× 1×1×1×i jhg

a General safety precautionsb Compressor unit installation and operation manualc Fluorinated greenhouse gases labeld Multilingual fluorinated greenhouse gases labele Screw (for shield of transmission wiring)f Cable tieg Gas piping accessory (circuit 1: to heat exchanger unit)

(Ø19.1 mm)h Liquid piping accessory (circuit 1: to heat exchanger unit)

(Ø12.7 mm)i Liquid piping accessory (circuit 2: to indoor units)

(Ø9.5 mm)j Gas piping accessory (circuit 2: to indoor units)

(Ø15.9 mm)

2.1.2 To remove the transportation stay

NOTICE

If the unit is operated with the transportation stay attached,abnormal vibration or noise may be generated.

The transportation stay installed over the compressor leg forprotecting the unit during transport must be removed. Proceed asshown in the figure and procedure below.

1 Slightly loosen the fixing nut (a).

2 Remove the transportation stay (b) as shown in the figurebelow.

3 Tighten the fixing nut (a) again.

http://www.daikineurope.com/support-and-manuals/product-information/

http://www.daikineurope.com/support-and-manuals/product-information/

3 About the units and options



·

3

1

(10.1 N·m)

2

a

b

3 About the units and options

3.1 About the compressor unit andheat exchanger unit

The compressor unit and heat exchanger unit are intended for indoorinstallation and aimed for air to air heat pump applications.

Specification RKXYQ5+RDXYQ5Maximum capacity Heating 16 kW

Cooling 14 kWOutside ambientdesign temperature

Heating –20~15.5°C WBCooling –5~46°C DB

Ambient design temperature of compressorunit and heat exchanger unit

5~35°C DB(26°C WB)

3.2 System layoutNOTICE

Design of the system must not be done at temperaturesbelow –15°C.

d d

c c

a

b

VRV DX VRV DX VRV DX EKEXV

AHU

d d

1 2

1 In case of VRV DX indoor units2 In case of VRV DX indoor units combined with an air

handling unita Heat exchanger unitb Compressor unitc Refrigerant pipingd User interface (dedicated depending on indoor unit type)

VRV DX VRV direct expansion (DX) indoor unitEKEXV Expansion valve kit

AHU Air handling unit

4 Preparation

4.1 Preparing installation site

4.1.1 Installation site requirements of thecompressor unit

▪ Service space. Mind the following requirements:≥10 a ≥10

≥10

≥500

≥10

(mm)

3D098835-1

b

a Top viewb Front view

NOTICE

This is a class A product. In a domestic environment thisproduct may cause radio interference in which case theuser may be required to take adequate measures.

4.2 Preparing refrigerant piping

4.2.1 Refrigerant piping requirements

NOTICE

Refrigerant R410A requires strict cautions for keeping thesystem clean and dry. Foreign materials (including mineraloils or moisture) should be prevented from getting mixedinto the system.

NOTICE

The piping and other pressure-containing parts shall besuitable for refrigerant. Use phosphoric acid deoxidisedseamless copper for refrigerant.

▪ Foreign materials inside pipes (including oils for fabrication) mustbe ≤30 mg/10 m.

4.2.2 Refrigerant piping material▪ Piping material: Phosphoric acid deoxidised seamless copper.

▪ Piping temper grade and thickness:

Outer diameter(Ø)

Temper grade Thickness (t)(a)

6.4 mm (1/4")

9.5 mm (3/8")

12.7 mm (1/2")

Annealed (O) ≥0.80 mmt

Ø

15.9 mm (5/8") Annealed (O) ≥0.99 mm19.1 mm (3/4") Half hard (1/2H) ≥0.80 mm

(a) Depending on the applicable legislation and the unit'smaximum working pressure (see "PS High" on the unitname plate), larger piping thickness might be required.

4 Preparation


6RKXYQ5T7Y1B


4.2.3 To select the piping sizeDetermine the proper size referring to following tables and referencefigure (only for indication).

A

a

B

D

D

CD

D

bEKEXV

AHU

VRV DX

VRV DX

c c

a Heat exchanger unitb Compressor unitc Refrigerant branch kit

VRV DX VRV DX indoor unitEKEXV Expansion valve kit

AHU Air handling unitA Piping between heat exchanger unit and compressor unitB Piping between compressor unit and (first) refrigerant

branch kit (= main pipe)C Piping between refrigerant branch kitsD Piping between refrigerant branch kit and indoor unit

In case the required pipe sizes (inch sizes) are not available, it isalso allowed to use other diameters (mm sizes), taken the followinginto account:

▪ Select the pipe size nearest to the required size.

▪ Use the suitable adapters for the change-over from inch to mmpipes (field supply).

▪ The additional refrigerant calculation has to be adjusted asmentioned in "5.6.2 To determine the additional refrigerantamount" on page 12.

A: Piping between heat exchanger unit andcompressor unitUse the following diameters:

Compressor unitcapacity type (HP)

Piping outer diameter size (mm)Gas pipe Liquid pipe

5 19.1 12.7

B: Piping between compressor unit and (first)refrigerant branch kitIf the equivalent pipe length between the heat exchanger unit andthe furthest indoor unit is 90 m or more, it is recommended toincrease the size (size-up) of the main gas pipe (betweencompressor unit and first refrigerant branch kit). If the recommendedgas pipe (size-up) is not available, you must use the standard size(which might result in a small capacity decrease).

Compressor unitcapacity type (HP)


Standard Size-up5 15.9 19.1 9.5

C: Piping between refrigerant branch kitsUse the following diameters:

Indoor unit capacityindex


<150 15.9 9.5

D: Piping between refrigerant branch kit andindoor unitUse the same diameters as the connections (liquid, gas) on theindoor units. The diameters of the indoor units are as follows:

Indoor unit capacityindex


15~50 12.7 6.463~140 15.9 9.5

4.2.4 To select refrigerant branch kitsFor piping example, refer to "4.2.3 To select the piping size" onpage 6.

Refnet jointWhen using refnet joints, choose from the following table inaccordance with the capacity of the compressor unit. Example:Refnet joint c.

Compressor unit capacity type(HP)

Refrigerant branch kit

5 KHRQ22M20T

Refnet headersWhen using refnet headers, choose from the following table inaccordance with the capacity of the compressor unit.

Compressor unit capacity type(HP)

Refrigerant branch kit

5 KHRQ22M29H

INFORMATION

Maximum 8 branches can be connected to a header.

4.3 Preparing electrical wiring

4.3.1 Safety device requirements

NOTICE

When using residual current operated circuit breakers, besure to use a high-speed type 300 mA rated residualoperating current.

Power supply: Compressor unitThe power supply must be protected with the required safetydevices, i.e. a main switch, a slow blow fuse on each phase and anearth leakage protector in accordance with the applicable legislation.

Selection and sizing of the wiring should be done in accordance withthe applicable legislation based on the information mentioned in thetable below.

Model Minimum circuitampacity

Recommendedfuses

RKXYQ5 13.5 A 16 A

▪ Phase and frequency: 3N~ 50 Hz

▪ Voltage: 380-415 V

Transmission wiringTransmission line section:

Transmission wiring Sheathed + shielded cable (2wires)

Vinyl cords

0.75~1.25 mm²

5 Installation



Maximum wiring length

(= distance between compressorunit and furthest indoor unit)

300 m

Total wiring length

(= distance between compressorunit and all indoor units, andbetween compressor unit andheat exchanger unit)

600 m

If the total transmission wiring exceeds these limits, it mayresult in communication error.

5 Installation

5.1 Opening the units

5.1.1 To open the compressor unit

DANGER: RISK OF BURNING

DANGER: RISK OF ELECTROCUTION

1 Remove the service cover of the compressor unit.

2 If you want to make field settings, remove the inspection cover.

3 If you want to connect electrical wiring, remove the switch boxcover.

2

3

1

5× 4×

5.2 Mounting the compressor unit

5.2.1 Guidelines when installing thecompressor unit

Check the strength and level of the installation ground so that theunit will not cause any operating vibration or noise. If the vibrationmight be transmitted to the building, use a vibration-proof rubber(field supply).

You can install the compressor unit directly on the floor or on astructure.

▪ On the floor. You do NOT have to fix the unit with anchor bolts.

▪ On a structure. Fix the unit securely with anchor bolts, nuts andwashers (field supply) to the structure. The foundation (steel beamframe or concrete) must be larger than the grey marked area.

a

≤480

516

≥666

426

≥640

(mm)

Minimum foundationa Anchor point (4×)

INFORMATION

The recommended height of the upper protruding part ofthe bolts is 20 mm.

20 m

m

5.3 Connecting the refrigerant pipingDANGER: RISK OF BURNING

5.3.1 Using the stop valve and service port

To handle the stop valve▪ Make sure to keep all stop valves open during operation.

▪ The stop valve is factory closed.

To open the stop valve1 Remove the stop valve cover.

2 Insert a hexagon wrench into the stop valve and turn the stopvalve counterclockwise.

3 When the stop valve cannot be turned any further, stop turning.

Result: The valve is now open.

To fully open the Ø19.1 stop valve, turn the hexagonal wrench until atorque between 27 and 33 N•m is achieved.

Inadequate torque may cause leakage of refrigerant and breakage ofthe stop valve cap.

1

23

4

5 Installation


8RKXYQ5T7Y1B


NOTICE

Pay attention that mentioned torque range is applicable foropening Ø19.1 mm stop valves only.

To close the stop valve1 Remove the stop valve cover.

2 Insert a hexagon wrench into the stop valve and turn the stopvalve clockwise.

3 When the stop valve cannot be turned any further, stop turning.

Result: The valve is now closed.

Closing direction:

To handle the stop valve cover▪ The stop valve cover is sealed where indicated by the arrow. Take

care not to damage it.

▪ After handling the stop valve, make sure to tighten the stop valvecover securely. For the tightening torque, refer to the table below.

▪ Check for refrigerant leaks after tightening the stop valve cover.

To handle the service port▪ Always use a charge hose equipped with a valve depressor pin,

since the service port is a Schrader type valve.

▪ After handling the service port, make sure to tighten the serviceport cover securely. For the tightening torque, refer to the tablebelow.

▪ Check for refrigerant leaks after tightening the service port cover.

Tightening torques

Stop valvesize (mm)

Tightening torque N•m (turn clockwise to close)Shaft

Valve body Hexagonalwrench

Cap (valvelid)

Serviceport

Ø9.5 5.4~6.6 4 mm 13.5~16.5 11.5~13.9Ø19.1 27.0~33.0 8 mm 22.5~27.5

5.3.2 To remove the pinched pipes

WARNING

Any gas or oil remaining inside the stop valve may blow offthe pinched piping.

Failure to observe the instructions in procedure belowproperly may result in property damage or personal injury,which may be serious depending on the circumstances.

Use the following procedure to remove the pinched piping:

1 Remove the valve cover and make sure that the stop valves arefully closed.

c

d

a

b

a Service port and service port coverb Stop valvec Field piping connectiond Stop valve cover

2 Connect the vacuuming/recovery unit through a manifold to theservice port of all stop valves.

You have to recover gas and oil from all 4 pinched pipes. Dependingon your available tools, use method 1 (manifold with refrigerant linesplitters required) or method 2.

Manifold Connections Compressor unit

p

e

B

A Method 1:

Connect to all serviceports at once.

C

abA

cdB

CC

C

D

D

cd

ba

Method 2:

First connect to thefirst 2 service ports.

C

C

bBaA

Then connect to thelast 2 service ports.

dBcA

C

C

a, b, c, d Service ports of stop valvese Vacuuming/recovery unit

A, B, C Valves A, B and CD Refrigerant line splitter

3 Recover gas and oil from the pinched piping by using arecovery unit.

CAUTION

Do not vent gases into the atmosphere.

4 When all gas and oil is recovered from the pinched piping,disconnect the charge hose and close the service ports.

5 Cut off the lower part of the gas and liquid stop valve pipesalong the black line. Use an appropriate tool (e.g. a pipe cutter,a pair of nippers).

5 Installation



WARNING

Never remove the pinched piping by brazing.

Any gas or oil remaining inside the stop valve may blow offthe pinched piping.

6 Wait until all oil is dripped out before continuing with theconnection of the field piping in case the recovery was notcomplete.

5.3.3 To connect the refrigerant piping to thecompressor unit

NOTICE

▪ Be sure to use the supplied accessory pipes whencarrying out piping work in the field.

▪ Be sure that the field installed piping does not touchother pipes, the bottom panel or side panel.

1 Remove the service cover. See "5.1.1 To open the compressorunit" on page 7.

2 Choose a piping route (a or b).

b

a

a

a To the backb To the top

3 If you have chosen the piping route to the top:

a b c d

a Cut the insulation (under the knockout hole).b Hit on the knockout hole, and remove it.c Remove the burrs.d Paint the edges and areas around the edges using repair

paint to prevent rusting.

NOTICE

Precautions when making knockout holes:

▪ Avoid damaging the casing.

▪ After making the knockout holes, we recommend youremove the burrs and paint the edges and areasaround the edges using repair paint to prevent rusting.

▪ When passing electrical wiring through the knockoutholes, wrap the wiring with protective tape to preventdamage.

4 Connect piping (by brazing) as follows:

a1

c1

c2c3

a2a3

b1

b2b3

d3d1d2

a Liquid line (circuit 2: to indoor units)b Gas line (circuit 2: to indoor units)c Gas line (circuit 1: to heat exchanger unit)d Liquid line (circuit 1: to heat exchanger unit)1 Pinched piping2 Piping accessory3 Field piping

5 Reattach the service cover.

6 Seal all gaps (example: a) to prevent small animals fromentering the system.

a

a

a

a

WARNING

Provide adequate measures to prevent that the unit can beused as a shelter by small animals. Small animals thatmake contact with electrical parts can cause malfunctions,smoke or fire.

5 Installation


10RKXYQ5T7Y1B


5.4 Checking the refrigerant piping

5.4.1 About checking the refrigerant pipingRefrigerant piping works are finished?

The indoor units, compressor unit and/or heat exchanger unit were already powered ON?

Use procedure:"Method 2: After power ON".

Finish piping work.

Use procedure:"Method 1: Before power ON (regular method)".

Yes

No

No

Yes

It is very important that all refrigerant piping work is done before theunits (compressor unit, heat exchanger unit or indoor units) arepowered on.

When the units are powered on, the expansion valves will initialise.This means that they will close. Leak test and vacuum drying of fieldpiping, heat exchanger unit and indoor units is impossible when thishappens.

Therefore, there will be explained 2 methods for initial installation,leak test and vacuum drying.

Method 1: Before power ONIf the system has not yet been powered on, no special action isrequired to perform the leak test and the vacuum drying.

Method 2: After power ONIf the system has already been powered on, activate setting [2‑21](refer to "6.1.4 To access mode 1 or 2" on page 16). This settingwill open field expansion valves to guarantee a R410A pipingpathway and make it possible to perform the leak test and thevacuum drying.

NOTICE

Make sure that the heat exchanger unit and all indoor unitsconnected to the compressor unit are powered on.

NOTICE

Wait until the compressor unit has finished the initialisationto apply setting [2‑21].

Leak test and vacuum dryingChecking the refrigerant piping involves:

▪ Checking for any leakages in the refrigerant piping.

▪ Performing vacuum drying to remove all moisture, air or nitrogenin the refrigerant piping.

If there is a possibility of moisture being present in the refrigerantpiping (for example, water may have entered the piping), first carryout the vacuum drying procedure below until all moisture has beenremoved.

All piping inside the unit has been factory tested for leaks.

Only field installed refrigerant piping needs to be checked.Therefore, make sure that all the compressor unit stop valves arefirmly closed before performing leak test or vacuum drying.

NOTICE

Make sure that all (field supplied) field piping valves areOPEN (not compressor unit stop valves!) before you startleak test and vacuuming.

For more information on the state of the valves, refer to"5.4.3 Checking refrigerant piping: Setup" on page 10.

5.4.2 Checking refrigerant piping: Generalguidelines

Connect the vacuum pump through a manifold to the service port ofall stop valves to increase efficiency (refer to "5.4.3 Checkingrefrigerant piping: Setup" on page 10).

NOTICE

Use a 2-stage vacuum pump with a non-return valve or asolenoid valve that can evacuate to a gauge pressure of–100.7 kPa (5 Torr absolute).

NOTICE

Make sure the pump oil does not flow oppositely into thesystem while the pump is not working.

NOTICE

Do not purge the air with refrigerants. Use a vacuum pumpto evacuate the installation.

5.4.3 Checking refrigerant piping: SetupThe system contains 2 refrigerant circuits:

▪ Circuit 1: Compressor unit → Heat exchanger unit

▪ Circuit 2: Compressor unit → Indoor units

You have to check both circuits (leak test, vacuuming drying). Howto check depends on your available tools:

If you have amanifold…

Then

With refrigerant linesplitters

You can check both circuits at once. To doso, connect the manifold via the splitters toboth circuits, and check.

Without refrigerantline splitters

(takes twice as long)

You have to check the circuits separately. Todo so:

▪ First connect the manifold to circuit 1,and check.

▪ Then connect the manifold to circuit 2,and check.

Possible connections:


p

R410AN2

b c e

ad

B

A Circuit 1 and 2together

C

ghA

fiB

CC

C

D

D

hi

gf

Only circuit 1

iBhA

C

C

Only circuit 2

C

C

fBgA

5 Installation



a Pressure reducing valveb Nitrogenc Weighing scalesd Refrigerant R410A tank (siphon system)e Vacuum pumpf Liquid line stop valve (circuit 2: to indoor units)g Gas line stop valve (circuit 2: to indoor units)h Gas line stop valve (circuit 1: to heat exchanger unit)i Liquid line stop valve (circuit 1: to heat exchanger unit)


Valve State of valveValves A, B and C OpenLiquid line and gas line stopvalves (f, g, h, i)

Close

NOTICE

The connections to the indoor units and to the heatexchanger unit, and all indoor units and the heatexchanger unit itself should also be leak and vacuumtested. Keep any possible (field supplied) field pipingvalves open as well.

Refer to the indoor unit installation manual for more details.Leak test and vacuum drying should be done before thepower supply is set to the unit. If not, see also the flowchart earlier described in this chapter (see "5.4.1 Aboutchecking the refrigerant piping" on page 10).

5.4.4 To perform a leak testThe leak test must satisfy the specifications of EN378‑2.

To check for leaks: Vacuum leak test1 Evacuate the system from the liquid and gas piping to

–100.7 kPa (–1.007 bar/5 Torr) for more than 2 hours.

2 Once reached, turn off the vacuum pump and check that thepressure does not rise for at least 1 minute.

3 Should the pressure rise, the system may either containmoisture (see vacuum drying below) or have leaks.

To check for leaks: Pressure leak test1 Break the vacuum by pressurising with nitrogen gas to a

minimum gauge pressure of 0.2 MPa (2 bar). Never set thegauge pressure higher than the maximum operation pressure ofthe unit, i.e. 4.0 MPa (40 bar).

2 Test for leaks by applying a bubble test solution to all pipingconnections.

3 Discharge all nitrogen gas.

NOTICE

Make sure to use a recommended bubble test solutionfrom your wholesaler. Do not use soap water, which maycause cracking of flare nuts (soap water may contain salt,which absorbs moisture that will freeze when the pipinggets cold), and/or lead to corrosion of flared joints (soapwater may contain ammonia which causes a corrosiveeffect between the brass flare nut and the copper flare).

5.4.5 To perform vacuum dryingTo remove all moisture from the system, proceed as follows:

1 Evacuate the system for at least 2 hours to a target vacuum of–100.7 kPa (–1.007 bar/5 Torr).

2 Check that, with the vacuum pump turned off, the targetvacuum is maintained for at least 1 hour.

3 Should you fail to reach the target vacuum within 2 hours ormaintain the vacuum for 1 hour, the system may contain toomuch moisture. In that case, break the vacuum by pressurisingwith nitrogen gas to a gauge pressure of 0.05 MPa (0.5 bar)and repeat steps 1 to 3 until all moisture has been removed.

4 Depending on whether you want to immediately chargerefrigerant through the refrigerant charge port or first pre-chargea portion of refrigerant through the liquid line, either open thecompressor unit stop valves, or keep them closed. See"5.6.3 To charge refrigerant" on page 12 for more information.

5.5 To insulate the refrigerant pipingAfter finishing the leak test and vacuum drying, the piping must beinsulated. Take into account the following points:

▪ Make sure to insulate the connection piping and refrigerant branchkits entirely.

▪ Be sure to insulate the liquid and gas piping (for all units).

▪ Use heat resistant polyethylene foam which can withstand atemperature of 70°C for liquid piping and polyethylene foam whichcan withstand a temperature of 120°C for gas piping.

▪ Reinforce the insulation on the refrigerant piping according to theinstallation environment.

Ambienttemperature

Humidity Minimum thickness

≤30°C 75% to 80% RH 15 mm>30°C ≥80% RH 20 mm

Condensation might form on the surface of the insulation.

▪ If there is a possibility that condensation on the stop valve mightdrip down into the indoor unit or into the heat exchanger unitthrough gaps in the insulation and piping because the compressorunit is located higher than the indoor unit or higher than the heatexchanger unit, this must be prevented by sealing up theconnections. See below figure.

ab

a Insulation materialb Caulking etc.

5.6 Charging refrigerant

5.6.1 Precautions when charging refrigerant

WARNING

▪ Only use R410A as refrigerant. Other substances maycause explosions and accidents.

▪ R410A contains fluorinated greenhouse gases. Itsglobal warming potential value is 2087.5. Do NOT ventthese gases into the atmosphere.

▪ When charging refrigerant, always use protectivegloves and safety glasses.

5 Installation


12RKXYQ5T7Y1B


NOTICE

If the power of some units is turned off, the chargingprocedure cannot be finished properly.

NOTICE

Be sure to turn on the power 6 hours before operation inorder to have power running to the crankcase heater andto protect the compressor.

NOTICE

If operation is performed within 12 minutes after thecompressor unit, heat exchanger unit and indoor units areturned on, the compressor will not operate before thecommunication is established in a correct way between thecompressor unit, heat exchanger unit and indoor units.

NOTICE

Before starting charging procedures, check if the 7‑LEDsdisplay is as normal (see "6.1.4 To access mode 1 or 2" onpage 16), and there is no malfunction code on the userinterface of the indoor unit. If a malfunction code ispresent, see "8.1 Solving problems based on errorcodes" on page 22.

NOTICE

Make sure all connected units (heat exchanger unit +indoor units) are recognised (setting [1‑5]).

5.6.2 To determine the additional refrigerantamount

Additional refrigerant to be charged=R (kg). R should be rounded offin units of 0.1 kg.

R=[(X1×Ø12.7)×0.12+(X2×Ø9.5)×0.059+(X3×Ø6.4)×0.022]×0.8+B

X1...3=Total length (m) of liquid piping size at Øa

Model B parameter (kg)RKXYQ5 3.1

When using metric piping, please take into account following tableconcerning the weight factor to be allocated. It should be substitutedin the formula for R.

Inch piping Metric pipingSize (Ø) (mm) Weight factor Size (Ø) (mm) Weight factor

6.4 0.022 6 0.0189.5 0.059 10 0.065

12.7 0.12 12 0.097

5.6.3 To charge refrigerantCharging refrigerant consists of 2 stages:

Stage DescriptionStage 1: Pre-charging Recommended in case of larger systems.

Can be skipped, but charging will take longerthen.

Stage 2: Manualcharging

Only necessary if the determined additionalrefrigerant amount is not reached yet bypre-charging.

Stage 1: Pre-charging

Summary – Pre-charging:

Refrigerant bottle Connected to the service ports of the stopvalves. Which stop valves to use dependson the circuits you choose to pre-charge to:

▪ Circuits 1 and 2 together (manifold withrefrigerant line splitters required).

▪ First circuit 1, then circuit 2 (or vice versa).

▪ Only circuit 1

▪ Only circuit 2Stop valves ClosedCompressor Does NOT operate

1 Connect as shown (choose one of the possible connections).Make sure that all compressor unit stop valves, as well as valveA are closed.

Possible connections:


p

R410AN2

b c e

ad

B

A Circuit 1 and 2together

C

ghA

fiB

CC

C

D

D

hi

gf

Only circuit 1

iBhA

C

C

Only circuit 2

C

C

fBgA

a Pressure reducing valveb Nitrogenc Weighing scalesd Refrigerant R410A tank (siphon system)e Vacuum pumpf Liquid line stop valve (circuit 2: to indoor units)g Gas line stop valve (circuit 2: to indoor units)h Gas line stop valve (circuit 1: to heat exchanger unit)i Liquid line stop valve (circuit 1: to heat exchanger unit)


2 Open valves C (on line of B) and B.

3 Pre‑charge refrigerant until the determined additional refrigerantamount is reached or pre‑charging is not possible anymore, andthen close valves C and B.

4 Do one of the following:

If ThenThe determined additionalrefrigerant amount is reached

Disconnect the manifold fromthe liquid line(s).

You do not have to perform the"Stage 2" instructions.

Too much refrigerant ischarged

Recover refrigerant until thedetermined additionalrefrigerant is reached.


You do not have to perform the"Stage 2" instructions.

The determined additionalrefrigerant amount is notreached yet


Continue with the "Stage 2"instructions.

5 Installation



Stage 2: Manual charging(= charging in the "Manual additional refrigerant charge" mode)

Summary – Manual charging:Refrigerant bottle Connected to the service port for refrigerant

charge.

This charges to both circuits, and to thecompressor unit's internal refrigerant piping.

Stop valves OpenCompressor Operates

5 Connect as shown. Make sure valve A is closed.

p

R410A

a c

b

A

e

d

a Weighing scalesb Refrigerant R410A tank (siphon system)c Vacuum pumpd Refrigerant charge porte Heat exchanger unitA Valve A

NOTICE

The refrigerant charging port is connected to the pipinginside the unit. The unit's internal piping is already factorycharged with refrigerant, so be careful when connectingthe charge hose.

6 Open all compressor unit stop valves. At this point, valve Amust remain closed!

7 Take all the precautions mentioned in "6 Configuration" onpage 15 and "7 Commissioning" on page 20 into account.

8 Turn on the power of the indoor units, compressor unit and heatexchanger unit.

9 Activate setting [2‑20] to start the manual additional refrigerantcharge mode. For details, see "6.1.8 Mode 2: Field settings" onpage 18.

Result: The unit will start operation.

INFORMATION

The manual refrigerant charge operation will automaticallystop within 30 minutes. If charging is not completed after30 minutes, perform the additional refrigerant chargingoperation again.

INFORMATION

▪ When a malfunction is detected during the procedure(e.g., in case of closed stop valve), a malfunction codewill be displayed. In that case, refer to "5.6.4 Errorcodes when charging refrigerant" on page 13 andsolve the malfunction accordingly. Resetting themalfunction can be done by pushing BS3. You canrestart the "Charging" instructions.

▪ Aborting the manual refrigerant charge is possible bypushing BS3. The unit will stop and return to idlecondition.

10 Open valve A.

11 Charge refrigerant until the remaining determined additionalrefrigerant amount is added, and then close valve A.

12 Press BS3 to stop the manual additional refrigerant chargemode.

NOTICE

Make sure to open all stop valves after (pre-) charging therefrigerant.

Operating with the stop valves closed will damage thecompressor.

NOTICE

After adding the refrigerant, do not forget to close the lid ofthe refrigerant charging port. The tightening torque for thelid is 11.5 to 13.9 N•m.

5.6.4 Error codes when charging refrigerant

INFORMATION

If a malfunction occurs, the error code is displayed on theuser interface of the indoor unit.

If a malfunction occurs, close valve A immediately. Confirm themalfunction code and take corresponding action, "8.1 Solvingproblems based on error codes" on page 22.

5.6.5 To fix the fluorinated greenhouse gaseslabel

1 Fill in the label as follows:

d

c

b

a

a From the multilingual fluorinated greenhouse gases labelpeal off the applicable language and stick it on top of a.

b Factory refrigerant charge: see unit name platec Additional refrigerant amount chargedd Total refrigerant charge

2 Fix the label on the inside of the compressor unit. There is adedicated place for it on the wiring diagram label.

5.7 Connecting the electrical wiring

5.7.1 Field wiring: OverviewField wiring consists of:

▪ Power supply (always including earth)

▪ Communication (= transmission) wiring between the compressorunit, the heat exchanger unit, and the indoor units.

Example:

g

fF1/F2(16 V)

F1/F2(16 V)

220-240 V1~ 50 Hz

e

c

a

d

b

220-240 V1~ 50 Hz

380-415 V3N~ 50 Hz

a Main switch

5 Installation


14RKXYQ5T7Y1B


b Earth connectionc Power supply wiring (including earth) (sheathed cable)

F1/F2 Transmission wiring (sheathed + shielded cable)d Compressor unite Heat exchanger unitf Indoor unitg User interface

BranchesNo branching is allowed after branching.

D

B

C

b2

b3

c1

c2

b1

a

A

A Central user interface (etc...)B Compressor unitC Indoor unitD Heat exchanger unita Main line. The main line is the line to which the

transmission wiring of the heat exchanger unit isconnected.

b1, b2, b3 Branch linesc1, c2 No branch is allowed after branch

5.7.2 Guidelines when connecting the electricalwiring

Tightening torques

Wiring Screw size Tightening torque(N•m)

Power supply wiring

(power supply +shielded ground)

M5 2.0~3.0

Transmission wiring M3.5 0.8~0.97

5.7.3 To connect the electrical wiring on thecompressor unit

NOTICE

▪ Follow the wiring diagram (delivered with the unit,located on the switch box cover).

▪ Make sure the electrical wiring does NOT obstructproper reattachment of the service cover.

1 Remove the service covers of the compressor unit and theswitch box.

2 Connect the transmission wiring as follows:

F1 F2 F1 F2 F1 F2

F1 F2 F1 F2 F1 F2

F1 F2 F1 F2 F1 F2

d

X2MX2MTO OUT/DTO IN/D

F1 F2 F1 F2

ba

c

a Compressor unitb Heat exchanger unitc Sheathed + shielded cable (2 wires) (no polarity)d Terminal board (field supply)

WARNING

You must use shielded wire and connect the earth to thetransmission terminal.

X2MF1 F2

a

a Earth (use the screw delivered as accessory)

3 Connect the power supply as follows:3N~ 50 Hz380-415 V

L1 L2 L3

L1 L2 L3

N X1M

ab

c

a Earth leakage circuit breakerb Fusec Power supply cable

4 Route the wiring through the frame, and fix the cables (powersupply and transmission wiring) with cable ties.

INFORMATION

To make routing the wiring easier, you can turn the switchbox horizontally by loosening the screw on the left side ofthe switch box.

1×

6 Configuration



X1MX2M c

c

b

a≥50 mm

ba

X2M

b a

X1ML1

F1 F2

L2 L3 N

c ca Transmission wiringb Power supplyc Cable tie

5 Reattach the service covers.

6 Connect an earth leakage circuit breaker and fuse to the powersupply line.

5.8 Finishing the compressor unitinstallation

5.8.1 To finish the transmission wiringAfter installing the transmission wires inside the unit, wrap themalong with the on-site refrigerant pipes using finishing tape, asshown in figure below.

a bc de

a Liquid pipeb Gas pipec Insulatord Transmission wiring (F1/F2)e Finishing tape

6 ConfigurationINFORMATION

It is important that all information in this chapter is readsequentially by the installer and that the system isconfigured as applicable.

DANGER: RISK OF ELECTROCUTION

6.1 Making field settings

6.1.1 About making field settingsTo configure the heat pump system, you must give input to thecompressor unit's main PCB (A1P). This involves the following fieldsetting components:

▪ Push buttons to give input to the PCB

▪ A display to read feedback from the PCB

▪ DIP switches (only change the factory settings if you install a cool/heat selector switch).

Field settings are defined by their mode, setting and value. Example:[2‑8]=4.

PC configuratorYou can also make field settings through a personal computerinterface (for this, option EKPCCAB is required). The installer canprepare the configuration (off-site) on PC and afterwards upload theconfiguration to the system.

See also: "6.1.9 To connect the PC configurator to the compressorunit" on page 20.

Mode 1 and 2

Mode DescriptionMode 1

(monitoringsettings)

Mode 1 can be used to monitor the currentsituation of the compressor unit. Some fieldsetting contents can be monitored as well.

Mode 2

(field settings)

Mode 2 is used to change the field settings ofthe system. Consulting the current field settingvalue and changing the current field settingvalue is possible.

In general, normal operation can be resumedwithout special intervention after changing fieldsettings.

Some field settings are used for specialoperation (e.g., 1 time operation, recovery/vacuuming setting, manual adding refrigerantsetting, etc.). In such a case, it is required toabort the special operation before normaloperation can restart. It will be indicated inbelow explanations.

6.1.2 To access the field setting componentsSee "5.1.1 To open the compressor unit" on page 7.

6.1.3 Field setting componentsThe components to make field settings are as follows:

A1P

A2P

X1M X2M

BS2

SET

BS1

MODE

BS3

RETURN

BS4

TEST

BS5

RESET

H1P H2P H3P H4P H5P H6P H7P H8P

1 2OFFON DS1

MULTIDEMANDL.N.O.P.SLAVEMASTERINDTEST/HWLMODE

DS1 DIP switchesBS1~BS5 Push buttonsH1P~H7P 7‑LEDs display

H8P LED for indication during initialisationON ( ) OFF ( ) Flashing ( )

6 Configuration


16RKXYQ5T7Y1B


DIP switchesOnly change the factory settings if you install a cool/heat selectorswitch.

DS1‑1 COOL/HEAT selector (refer to the manual of thecool/heat selector switch). OFF=notinstalled=factory setting

DS1‑2 NOT USED. DO NOT CHANGE THE FACTORYSETTING.

Push buttonsUse the push buttons to make the field settings. Operate the pushbuttons with an insulated stick (such as a closed ball-point pen) toavoid touching of live parts.

BS1 MODE: For changing the set modeBS2 SET: For field settingBS3 RETURN: For field settingBS4 TEST: For test operationBS5 RESET: For resetting the address when the wiring is

changed or when an additional indoor unit is installed

7‑LEDs displayThe display gives feedback about the field settings, which aredefined as [Mode-Setting]=Value.

H1P Shows the modeH2P~H7P Shows the settings and values, represented in binary code

H8P NOT used for field settings, but used during initialisation

Example:

H1P H2P H3P H4P H5P H6P H7P

- + + + + +[H1P 32 16 8 4 2 1] Description

(H1P OFF)

Default situation

(H1P flashing)

Mode 1

(H1P ON)

Mode 2

+ + + + +0 0 8 0 0 0

(H2P~H7P = binary 8)

Setting 8

(in mode 2)

+ + + + +0 0 0 4 0 0

(H2P~H7P = binary 4)

Value 4

(in mode 2)

6.1.4 To access mode 1 or 2After the units are turned ON, the display goes to its defaultsituation. From there, you can access mode 1 and mode 2.

Initialisation: default situation

NOTICE


Turn on the power supply of the compressor unit, heat exchangerunit, and all indoor units. When the communication between thecompressor unit, heat exchanger unit, and indoor units is establishedand normal, the display indication state will be as below (defaultsituation when shipped from factory).

10~12 min

b

c

a

a Power ONb Default situationc LED indication when there is a malfunction

If the default situation is not displayed after 10~12 minutes, checkthe malfunction code on the indoor unit user interface. Solve themalfunction code accordingly. First, check the communication wiring.

Switching between modesUse BS1 to switch between the default situation, mode 1 andmode 2.

BS1 [5 s]BS1BS1 BS1

a

cba Default situation (H1P OFF)b Mode 1 (H1P flashing)c Mode 2 (H1P ON)

BS1 Press BS1.BS1 [5 s] Press BS1 for at least 5 s.

INFORMATION

If you get confused in the middle of the process, press BS1to return to the default situation.

6.1.5 To use mode 1 (and default situation)In mode 1 (and in default situation) you can read out someinformation.

Example: 7‑LEDs display – Default situationYou can read out the status of low noise operation as follows:

# Action Button/display1 Make sure the LEDs are

showing the default situation.(H1P OFF)

2 Check the status of LEDH6P. H6P OFF: Unit is currently

not operating under low noiserestrictions.

H6P ON: Unit is currentlyoperating under low noiserestrictions.

Example: 7‑LEDs display – Mode 1You can read out setting [1‑5] (= the total number of connected units(heat exchanger unit + indoor units)) as follows:

# Action Button/display1 Start from the default

situation.

6 Configuration



# Action Button/display2 Select mode 1. BS1 [1×]

3 Select setting 5.

("X×" depends on the settingthat you want to select.)

BS2 [X×]

(= binary 5)4 Display the value of setting 5.

(there are 8 units connected)

BS3 [1×]

(= binary 8)5 Quit mode 1. BS1 [1×]

6.1.6 To use mode 2In mode 2 you can make field settings to configure the system.

Example: 7‑LEDs display – Mode 2You can change the value of setting [2‑8] (= Te target temperatureduring cooling operation) to 4 (= 8°C) as follows:

# Action Button/display1 Start from the default

situation.2 Select mode 2. BS1 [5 s]

3 Select setting 8.

("X×" depends on the settingthat you want to select.)

BS2 [X×]

(= binary 8)4 Select value 4 (= 8°C).

a: Display the current value.

b: Change to 4. ("X×"depends on the currentvalue, and the value that youwant to select.)

c: Enter the value in thesystem.

d: Confirm. The system startsoperating according to thesetting.

BS2 [X×]b

a

BS3 [1×]c

BS3 [1×]d

BS3 [1×]

5 Quit mode 2. BS1 [1×]

6.1.7 Mode 1 (and default situation): Monitoringsettings

In mode 1 (and in default situation) you can read out someinformation.

7‑LEDs display – Default situation (H1P OFF)You can read out the following information:

Value / DescriptionH6P Shows the status of low noise operation.

OFF

Unit is currently not operating under low noiserestrictions.

ON

Unit is currently operating under low noiserestrictions.

Low noise operation reduces the sound generated by theunit compared to nominal operating conditions.

Low noise operation can be set in mode 2. There are twomethods to activate low noise operation of the compressorunit and heat exchanger unit.

▪ The first method is to enable an automatic low noiseoperation during night time by field setting. The unit willoperate at the selected low noise level during theselected time frames.

▪ The second method is to enable low noise operationbased on an external input. For this operation an optionalaccessory is required.

H7P Shows the status of power consumption limitation operation.OFF

Unit is currently not operating under powerconsumption limitations.

ON

Unit is currently operating under power consumptionlimitation.

Power consumption limitation reduces the powerconsumption of the unit compared to nominal operatingconditions.

Power consumption limitation can be set in mode 2. Thereare two methods to activate power consumption limitation ofthe compressor unit.

▪ The first method is to enable a forced power consumptionlimitation by field setting. The unit will always operate atthe selected power consumption limitation.

▪ The second method is to enable power consumptionlimitation based on an external input. For this operationan optional accessory is required.

7‑LEDs display – Mode 1 (H1P flashing)You can read out the following information:

Setting( )

Value / Description

[1‑5]

Shows the total number ofconnected units (heat exchangerunit + indoor units).

It can be convenient to check ifthe total number of units whichare installed (heat exchanger unit+ indoor units) match the totalnumber of units which arerecognised by the system. Incase there is a mismatch, it isadvised to check thecommunication wiring pathbetween compressor unit andheat exchanger unit, andbetween compressor unit andindoor units (F1/F2communication line).

6 Configuration


18RKXYQ5T7Y1B


Setting( )

Value / Description

[1‑14]

Shows the latest malfunctioncode.

When the latest malfunctioncodes were reset by accident onan indoor unit user interface, theycan be checked again throughthis monitoring settings.

For the content or reason behindthe malfunction code see"8.1 Solving problems based onerror codes" on page 22, wheremost relevant malfunction codesare explained. Detailedinformation about malfunctioncodes can be consulted in theservice manual of this unit.

To obtain more detailedinformation about the malfunctioncode, press BS2 up to 3 times.

[1‑15]

Shows the 2nd last malfunctioncode.[1‑16]

Shows the 3rd last malfunctioncode.

6.1.8 Mode 2: Field settings

In mode 2 you can make field settings to configure the system. The LEDs give a binary representation of the setting/value number.

Setting

(= binary)

ValueDescription

[2‑8]

Te target temperature during cooling operation. (default)

Auto

6°C7°C8°C9°C

10°C11°C

[2‑9]

Tc target temperature during heating operation. (default)

Auto

41°C43°C46°C

[2‑12]

Enable the low noise function and/or power consumption limitationvia external control adaptor (DTA104A61/62).

If the system needs to be running under low noise operation orunder power consumption limitation conditions when an externalsignal is sent to the unit, this setting should be changed. Thissetting will only be effective when the optional external controladaptor (DTA104A61/62) is installed in the indoor unit.

(default)

Deactivated.

Activated.

[2‑15]

Fan static pressure setting (in heat exchanger unit).

You can set the external static pressure of the heat exchanger unitaccording to the ducting requirements.

30 Pa

(default)

60 Pa

90 Pa120 Pa150 Pa

6 Configuration



Setting

(= binary)

ValueDescription

[2‑20]

Manual additional refrigerant charge.

In order to add the additional refrigerant charge amount in amanual way (without automatic refrigerant charging functionality),following setting should be applied.

(default)

Deactivated.

Activated.

To stop the manual additional refrigerantcharge operation (when the required additionalrefrigerant amount is charged), push BS3. Ifthis function was not aborted by pushing BS3,the unit will stop its operation after 30 minutes.If 30 minutes was not sufficient to add theneeded refrigerant amount, the function can bereactivated by changing the field setting again.

[2‑21]

Refrigerant recovery/vacuuming mode.

In order to achieve a free pathway to reclaim refrigerant out of thesystem or to remove residual substances or to vacuum the systemit is necessary to apply a setting which will open required valves inthe refrigerant circuit so the reclaim of refrigerant or vacuumingprocess can be done properly.

(default)

Deactivated.

Activated.

To stop the refrigerant recovery/vacuumingmode, push BS1. If BS1 is not pushed, thesystem will remain in refrigerant recovery/vacuuming mode.

[2‑22]

Automatic low noise setting and level during night time.

By changing this setting, you activate the automatic low noiseoperation function of the unit and define the level of operation.Depending on the chosen level, the noise level will be lowered.The start and stop moments for this function are defined undersetting [2‑26] and [2‑27].

(default)

Deactivated

Level 1 Level 3<Level 2<Level 1Level 2Level 3

[2‑25]

Low noise operation level via the external control adaptor.

If the system needs to be running under low noise operationconditions when an external signal is sent to the unit, this settingdefines the level of low noise that will be applied.

This setting will only be effective when the optional external controladaptor (DTA104A61/62) is installed and the setting [2‑12] wasactivated.

Level 1 Level 3<Level 2<Level 1

(default)

Level 2

Level 3

[2‑26]

Low noise operation start time.

This setting is used in conjunction with setting [2‑22].

20h00

(default)

22h00

24h00[2‑27]

Low noise operation stop time.


6h007h00

(default)

8h00

[2‑30]

Power consumption limitation level (step 1) via the external controladaptor (DTA104A61/62).

If the system needs to be running under power consumptionlimitation conditions when an external signal is sent to the unit, thissetting defines the level power consumption limitation that will beapplied for step 1. The level is according to the table.

60%

(default)

70%

80%

[2‑31]

Power consumption limitation level (step 2) via the external controladaptor (DTA104A61/62).

If the system needs to be running under power consumptionlimitation conditions when an external signal is sent to the unit, thissetting defines the level power consumption limitation that will beapplied for step 2. The level is according to the table.

30%

(default)

40%

50%

7 Commissioning


20RKXYQ5T7Y1B


Setting

(= binary)

ValueDescription

[2‑32]

Forced, all time, power consumption limitation operation (noexternal control adaptor is required to perform power consumptionlimitation).

If the system always needs to be running under powerconsumption limitation conditions, this setting activates and definesthe level power consumption limitation that will be appliedcontinuously. The level is according to the table.

(default)

Function not active.

Follows [2‑30] setting.Follows [2‑31] setting.

[2‑41]

Cooling comfort setting.


Eco

(default)

Mild

QuickPowerful

[2‑42]

Heating comfort setting.


Eco

(default)

Mild

QuickPowerful

6.1.9 To connect the PC configurator to thecompressor unit

a b

X41A

A1P

23

45

H JS

T

a PCb Cable (EKPCCAB)

X41A ConnectorA1P Compressor unit main PCB

7 CommissioningAfter installation and once the field settings are defined, the installeris obliged to verify correct operation. Therefore a test run must beperformed according to the procedures described below.

7.1 Precautions when commissioningCAUTION

Do not perform the test operation while working on theindoor units or the heat exchanger unit.

When performing the test operation, not only thecompressor unit will operate, but the heat exchanger unitand the connected indoor units as well. Working on anindoor unit or the heat exchanger unit while performing atest operation is dangerous.

NOTICE


During test operation, the compressor unit, the heat exchanger unitand the indoor units will start up. Make sure that the preparations ofthe heat exchanger unit and all the indoor units are finished (fieldpiping, electrical wiring, air purge, ...). See installation manual of theindoor units for details.

7.2 Checklist before commissioningAfter the installation of the unit, first check the following items. Onceall below checks are fulfilled, the unit must be closed, only then canthe unit be powered up.

You read the complete installation and operationinstructions, as described in the installer and userreference guide.Installation

Check that the unit is properly installed, to avoid abnormalnoises and vibrations when starting up the unit.Field wiring

Be sure that the field wiring has been carried outaccording to the instructions described in the chapter"5.7 Connecting the electrical wiring" on page 13,according to the wiring diagrams and according to theapplicable legislation.Power supply voltage

Check the power supply voltage on the local supply panel.The voltage must correspond to the voltage on theidentification label of the unit.Earth wiring

Be sure that the earth wires have been connectedproperly and that the earth terminals are tightened.Insulation test of the main power circuit

Using a megatester for 500 V, check that the insulationresistance of 2 MΩ or more is attained by applying avoltage of 500 V DC between power terminals and earth.Never use the megatester for the transmission wiring.

7 Commissioning



Fuses, circuit breakers, or protection devices

Check that the fuses, circuit breakers, or the locallyinstalled protection devices are of the size and typespecified in the chapter "4.3.1 Safety devicerequirements" on page 6. Be sure that neither a fuse nor aprotection device has been bypassed.Internal wiring

Visually check the electrical component box and theinside of the unit on loose connections or damagedelectrical components.Pipe size and pipe insulation

Be sure that correct pipe sizes are installed and that theinsulation work is properly executed.Stop valves

Be sure that the stop valves are open on both liquid andgas side.Damaged equipment

Check the inside of the unit on damaged components orsqueezed pipes.Refrigerant leak

Check the inside of the unit on refrigerant leakage. If thereis a refrigerant leak, try to repair the leak. If the repair isunsuccessful, call your local dealer. Do not touch anyrefrigerant which has leaked out from refrigerant pipingconnections. This may result in frostbite.Oil leak

Check the compressor for oil leakage. If there is an oilleak, try to repair the leak. If the repairing is unsuccessful,call your local dealer.Air inlet/outlet

Check that the air inlet and outlet of the unit is notobstructed by paper sheets, cardboard, or any othermaterial.Additional refrigerant charge

The amount of refrigerant to be added to the unit shall bewritten on the included "Added refrigerant" plate andattached to the rear side of the front cover.Installation date and field setting

Be sure to keep record of the installation date on thesticker on the rear of the front panel according toEN60335‑2‑40 and keep record of the contents of the fieldsetting(s).Insulation and air leaks

Make sure the unit is fully insulated and checked for airleaks.

Possible consequence: Condensate water might drip.Drainage

Make sure drainage flows smoothly.

Possible consequence: Condensate water might drip.External static pressure

Make sure the external static pressure is set.

Possible consequence: Insufficient cooling or heating.

7.3 Checklist during commissioningTo perform a test run.

7.3.1 About test runThe procedure below describes the test operation of the completesystem. This operation checks and judges following items:

▪ Check of wrong wiring (communication check with indoor unitsand heat exchanger unit).

▪ Check of the stop valves opening.

▪ Check of wrong piping. Example: Gas or liquid pipes switched.

▪ Judgement of piping length.

Make sure to carry out the system test operation after the firstinstallation. Otherwise, the malfunction code will be displayed onthe user interface and normal operation or individual indoor unit testrun cannot be carried out.

Abnormalities on indoor units cannot be checked for each unitseparately. After the test operation is finished, check the indoor unitsone by one by performing a normal operation using the userinterface. Refer to the indoor unit installation manual for more detailsconcerning the individual test run.

INFORMATION

▪ It may take 10 minutes to achieve a uniform refrigerantstate before the compressor starts.

▪ During the test operation, the refrigerant running soundor the magnetic sound of a solenoid valve may becomeloud and the display indication may change. These arenot malfunctions.

7.3.2 To perform a test run (7-LEDs display)1 Make sure all field settings you want are set; see "6.1 Making

field settings" on page 15.

2 Turn ON the power to the compressor unit, heat exchanger unit,and the connected indoor units.

NOTICE


3 Make sure the default (idle) situation is existing (H1P is OFF);see "6.1.4 To access mode 1 or 2" on page 16. Push BS4 for 5seconds or more. The unit will start test operation.

Result: The test operation is automatically carried out, thecompressor unit H2P flashes and the indication "Test operation"and "Under centralised control" will display on the user interfaceof indoor units.

Steps during the automatic system test run procedure:

Step DescriptionControl before start up (pressureequalisation)Cooling start up controlCooling stable conditionCommunication checkStop valve checkPipe length checkPump down operationUnit stop

INFORMATION

During the test operation, it is not possible to stop the unitoperation from a user interface. To abort the operation,press BS3. The unit will stop after ±30 seconds.

4 Check the test operation results on the compressor unit 7‑LEDsdisplay.

8 Troubleshooting


22RKXYQ5T7Y1B


Completion DescriptionNormalcompletionAbnormalcompletion Refer to "7.3.3 Correcting after abnormal

completion of the test run" on page 22 to takeactions for correcting the abnormality. Whenthe test operation is fully completed, normaloperation will be possible after 5 minutes.

7.3.3 Correcting after abnormal completion ofthe test run

The test operation is only completed if there is no malfunction codedisplayed. In case of a displayed malfunction code, performcorrecting actions as explained in the malfunction code table. Carryout the test operation again and confirm that the abnormality isproperly corrected.

INFORMATION


INFORMATION

Refer to the installation manual of the indoor unit for otherdetailed malfunction codes related to indoor units.

7.3.4 Operating the unitOnce the units are installed and test operation of compressor unit,heat exchanger unit and indoor units is finished, the operation of thesystem can start.

For operating the indoor unit, the user interface of the indoor unitshould be switched ON. Refer to the indoor unit operation manual formore details.

8 Troubleshooting

8.1 Solving problems based on errorcodes

In case of a displayed malfunction code, perform correcting actionsas explained in the malfunction code table.

After correcting the abnormality, press BS3 to reset the malfunctioncode and retry operation.

INFORMATION


8.1.1 Error codes: Overview

Main code Cause Solution▪ Heat exchanger fan malfunction.

▪ Drain pump feedback contact is open.

In the heat exchanger unit:

▪ Check connection on PCB: A1P (X15A)

▪ Check connection on terminal block (X2M)

▪ Check the fan connectors.▪ The stop valves of the compressor unit are left closed.

▪ Refrigerant overcharge

▪ Open the stop valves on both the gas and liquid side.

▪ Recalculate the required amount of refrigerant from thepiping length and correct the refrigerant charge level byrecovering any excessive refrigerant with a refrigerantrecovery machine.

▪ The stop valves of the compressor unit are left closed.

▪ Insufficient refrigerant


▪ Check if the additional refrigerant charge has beenfinished correctly. Recalculate the required amount ofrefrigerant from the piping length and add an adequateamount of refrigerant.

Electronic expansion valve malfunction

Heat exchanger unit: (Y1E) - A1P (X7A)

Compressor unit: (Y1E) - A1P (X22A)

Check connection on PCB or actuator.


▪ Insufficient refrigerant


▪ Check if the additional refrigerant charge has beenfinished correctly. Recalculate the required amount ofrefrigerant from the piping length and add an adequateamount of refrigerant.

Refrigerant overcharge Recalculate the required amount of refrigerant from thepiping length and correct the refrigerant charge level byrecovering any excessive refrigerant with a refrigerantrecovery machine.

Ambient temperature sensor malfunction

Heat exchanger unit: (R1T) - A1P (X16A)


Discharge temperature sensor malfunction: open circuit /short circuit

Compressor unit: (R2T) - A1P (X12A)


8 Troubleshooting



Main code Cause SolutionHeat exchanger gas sensor malfunction



Suction temperature sensor malfunction




Coil temperature sensor malfunction



Liquid temperature sensor (after subcool HE) malfunction



Gas temperature sensor (after subcool HE) malfunction



High pressure sensor malfunction: open circuit / short circuit

Compressor unit: (BIPH) - A1P (X17A)


Low pressure sensor malfunction: open circuit / short circuit

Compressor unit: (BIPL) - A1P (X18A)


Transmission compressor unit - inverter: INV1 transmissiontrouble

Check connection.

INV1 unbalanced power supply voltage Check if power supply is within range.Heat exchanger unit capacity setting malfunction. Check the type of heat exchanger unit. If necessary, replace

the heat exchanger unit.Insufficient supply voltage Check if the supply voltage is supplied properly.Malfunction code: System test run not yet executed (systemoperation not possible)

Execute system test run.

▪ No power is supplied to the compressor unit.

▪ Transmission wiring malfunction

▪ Check if all units are powered on.

▪ Check the transmission wiring.▪ System mismatch. Wrong type of indoor units combined

(R410A, R407C, RA, etc). Indoor unit malfunction

▪ Heat exchanger unit malfunction

▪ Check if other indoor units have malfunction and confirmindoor unit mix is allowed.

▪ Check the transmission wiring to the heat exchanger unit.▪ Improper type of indoor units are connected.

▪ Mismatch of compressor unit and heat exchanger unit.

▪ Check the type of indoor units that are currentlyconnected. If they are not proper, replace them withproper ones.

▪ Check if the compressor unit and heat exchanger unit arecompatible.


▪ The piping and wiring of the specified indoor unit or heatexchanger unit are not connected correctly to thecompressor unit.


▪ Confirm that the piping and wiring of the specified indoorunit or heat exchanger unit are connected correctly to thecompressor unit.

9 Technical data


24RKXYQ5T7Y1B


9 Technical dataLatest information can be found in the technical engineering data.

9.1 Piping diagram: Compressor unit and heat exchanger unit

R2T

R3T

R1T

M1FM2F

Y1E

Y3E

R2T

M1C

R3TR7T

R4T

Y1S

S1NPL

S1PH

S1NPH

A B

R5T

f fc

bf

g

a

df h

f i

jk

e

l

3D098825-1A Heat exchanger unitB Compressor unita Stop valve (gas) (circuit 2: to indoor units)b Stop valve (liquid) (circuit 2: to indoor units)c Stop valve (liquid) (circuit 1: to heat exchanger unit)d Stop valve (gas) (circuit 1: to heat exchanger unit)e Service port (refrigerant charge)f Filter (5×)g Subcool heat exchangerh Pressure regulating valvei Capillary tubej Accumulator

k Compressor accumulatorl Heat exchanger

M1C CompressorM1F-M2F Fan motor

R1T (A) Thermistor (air)R2T (A) Thermistor (gas)R3T (A) Thermistor (coil)R2T (B) Thermistor (discharge)R3T (B) Thermistor (suction accumulator)R4T (B) Thermistor (subcool heat exchanger gas)R5T (B) Thermistor (suction compressor)R7T (B) Thermistor (liquid)S1NPH High pressure sensorS1NPL Low pressure sensor

S1PH High pressure switchY1E, Y3E Electronic expansion valve

Y1S Solenoid valve (4‑way valve)HeatingCooling

9.2 Wiring diagram: Compressor unitThe wiring diagram is delivered with the unit, located on the switchbox cover.

Symbols:

X1M Main terminal

Earth wiring

15 Wire number 15

Field wire

Field cable

**/12.2 Connection ** continues on page 12 column 2

10 About the system



1 Several wiring possibilities

Option

Not mounted in switch box

Wiring depending on model

PCB

Legend for wiring diagram RKXYQ5:

A1P Printed circuit board (main)

A2P Printed circuit board (inverter)

BS* Push button (A1P)

C* Capacitor (A2P)

DS1 DIP switch (A1P)

F1U, F2U Fuse (T 31.5 A / 250 V) (A1P)

F3U, F5U Fuse (T 6.3 A / 250 V) (A1P)

H*P LED (service monitor orange) (A1P)

HAP Running LED (service monitor green) (A*P)

K1M Magnetic contactor (A2P)

K1R Magnetic relay (A*P)

L1R Reactor

M1C Motor (compressor)

M1F Motor (fan)

PS Switching power supply (A2P)

Q1DI Earth leakage circuit breaker (field supply)

R* Resistor (A2P)

R2T Thermistor (discharge)

R3T Thermistor (suction accumulator)

R4T Thermistor (subcool heat exchanger gas)

R5T Thermistor (suction compressor)

R7T Thermistor (liquid)

R10T Thermistor (fin)

S1NPL Low pressure sensor

S1NPH High pressure sensor

S1PH High pressure switch

S*S Cool/heat selector switch (optional)

V1R IGBT power module (A2P)

V2R Diode module (A2P)

X1M Terminal strip (power supply)

X2M Terminal strip (transmission wiring)

X*Y Connector

Y3E Electronic expansion valve

Y1S Solenoid valve (4‑way valve)

Z*C Noise filter (ferrite core)

Z*F Noise filter (A1P)

For the user

10 About the systemThe VRV IV heat pump for indoor installation can be used forheating/cooling applications.

NOTICE

Do not use the air conditioner for other purposes. In orderto avoid any quality deterioration, do not use the unit forcooling precision instruments, food, plants, animals orworks of art.

NOTICE

For future modifications or expansions of your system:

A full overview of allowable combinations (for futuresystem extensions) is available in technical engineeringdata and should be consulted. Contact your installer toreceive more information and professional advice.

10.1 System layout

d d

c c

a

b


AHU

d d

1 2

1 In case of VRV DX indoor units2 In case of VRV DX indoor units combined with an air

handling unita Heat exchanger unitb Compressor unitc Refrigerant pipingd User interface (dedicated depending on indoor unit type)



11 User interfaceCAUTION

Never touch the internal parts of the controller.

Do not remove the front panel. Some parts inside aredangerous to touch and appliance problems may happen.For checking and adjusting the internal parts, contact yourdealer.

This operation manual will give a non-exhaustive overview of themain functions of the system.

Detailed information on required actions to achieve certain functionscan be found in the dedicated installation and operation manual ofthe indoor unit.

Refer to the operation manual of the installed user interface.

12 Operation

12.1 Operation rangeUse the system in the following temperature and humidity ranges forsafe and effective operation.

12 Operation


26RKXYQ5T7Y1B


Specification RKXYQ5+RDXYQ5Outside ambientdesign temperature

Heating –20~15.5°C WBCooling –5~46°C DB

Ambient design temperature of compressorunit and heat exchanger unit

5~35°C DB(26°C WB)

Indoor humidity ≤80%(a)

(a) To avoid condensation and water dripping out of the unit. Ifthe temperature or the humidity is beyond these conditions,safety devices may be put in action and the air conditionermay not operate.

Special operation ranges are valid in case of using AHU. They canbe found in the installation/operation manual of the dedicated unit.Latest information can be found in the technical engineering data.

12.2 Operating the system

12.2.1 About operating the system▪ Operation procedure varies according to the combination of

compressor unit, heat exchanger unit, and user interface.

▪ To protect the unit, turn on the main power switch 6 hours beforeoperation.

▪ If the main power supply is turned off during operation, operationwill restart automatically after the power turns back on again.

▪ When stopping the unit, the unit might still operate for a fewminutes. This is not a malfunction.

12.2.2 About cooling, heating, fan only, andautomatic operation

▪ Changeover cannot be made with a user interface whose displayshows "change-over under centralised control" (refer toinstallation and operation manual of the user interface).

▪ When the display "change-over under centralised control"flashes, refer to "12.5.1 About setting the master userinterface" on page 27.

▪ The fan may keep on running for about 1 minute after the heatingoperation stops.

▪ The air flow rate may adjust itself depending on the roomtemperature or the fan may stop immediately. This is not amalfunction.

12.2.3 About the heating operationIt may take longer to reach the set temperature for general heatingoperation than for cooling operation.

The following operation is performed in order to prevent the heatingcapacity from dropping or cold air from blowing.

Defrost operationIn heating operation, freezing of the heat exchanger unit's air cooledcoil increases over time, restricting the energy transfer to the heatexchanger unit's coil. Heating capability decreases and the systemneeds to go into defrost operation to be able to deliver enough heatto the indoor units:

The indoor unit will stop fan operation, the refrigerant cycle willreverse and energy from inside the building will be used to defrostthe heat exchanger unit coil.

The indoor unit will indicate defrost operation on the displays.

During defrost operation, ice melts and possibly evaporates.Possible consequence: Mist might be visible during or directly afterdefrost operation. This is not a malfunction.

Hot startIn order to prevent cold air from blowing out of an indoor unit at thestart of heating operation, the indoor fan is automatically stopped.The display of the user interface shows . It may take sometime before the fan starts. This is not a malfunction.

12.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch)

1 Press the operation mode selector button on the user interfaceseveral times and select the operation mode of your choice.

Cooling operation

Heating operation

Fan only operation

2 Press the ON/OFF button on the user interface.

Result: The operation lamp lights up and the system startsoperating.

12.2.5 To operate the system (WITH cool/heatchangeover remote control switch)

Overview of the changeover remote control switch

a

b

a FAN ONLY/AIR CONDITIONINGSELECTOR SWITCH

Set the switch to for fan onlyoperation or to for heating orcooling operation.

b COOL/HEAT CHANGEOVER SWITCH

Set the switch to for cooling or to for heating

To start1 Select operation mode with the cool/heat changeover switch as

follows:

Cooling operation Heating operation Fan only operation

1

1

1

1 1

2 Press the ON/OFF button on the user interface.


To stop3 Press the ON/OFF button on the user interface once again.

Result: The operation lamp goes out and the system stopsoperating.

NOTICE

Do not turn off power immediately after the unit stops, butwait for at least 5 minutes.

12 Operation



To adjustFor programming temperature, fan speed and air flow direction referto the operation manual of the user interface.

12.3 Using the dry program

12.3.1 About the dry program▪ The function of this program is to decrease the humidity in your

room with minimal temperature decrease (minimal room cooling).

▪ The micro computer automatically determines temperature andfan speed (cannot be set by the user interface).

▪ The system does not go into operation if the room temperature islow (<20°C).

12.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch)

To start1 Press the operation mode selector button on the user interface

several times and select (program dry operation).

2 Press the ON/OFF button of the user interface.


3 Press the air flow direction adjust button (only for double-flow,multi-flow, corner, ceiling-suspended and wall-mounted). Referto "12.4 Adjusting the air flow direction" on page 27 for details.



NOTICE


12.3.3 To use the dry program (WITH cool/heatchangeover remote control switch)

To start1 Select cooling operation mode with the cool/heat changeover

remote control switch.

1

1

2 Press the operation mode selector button on the user interfaceseveral times and select (program dry operation).

3 Press the ON/OFF button of the user interface.


4 Press the air flow direction adjust button (only for double-flow,multi-flow, corner, ceiling-suspended and wall-mounted). Referto "12.4 Adjusting the air flow direction" on page 27 for details.



NOTICE


12.4 Adjusting the air flow directionRefer to the operation manual of the user interface.

12.4.1 About the air flow flap

Double flow+multi-flow units

Corner units

Ceiling suspended units

Wall-mounted units

For the following conditions, a micro computer controls the air flowdirection which may be different from the display.

Cooling Heating▪ When the room temperature is

lower than the settemperature.

▪ When starting operation.

▪ When the room temperature ishigher than the settemperature.

▪ At defrost operation.▪ When operating continuously at horizontal air flow direction.

▪ When continuous operation with downward air flow is performedat the time of cooling with a ceiling-suspended or a wall-mountedunit, the micro computer may control the flow direction, and thenthe user interface indication will also change.

The air flow direction can be adjusted in one of the following ways:

▪ The air flow flap itself adjusts its position.

▪ The air flow direction can be fixed by the user.

▪ Automatic and desired position .

WARNING

Never touch the air outlet or the horizontal blades while theswing flap is in operation. Fingers may become caught orthe unit may break down.

NOTICE

▪ The movable limit of the flap is changeable. Contactyour dealer for details. (only for double-flow, multi-flow,corner, ceiling-suspended and wall-mounted).

▪ Avoid operating in the horizontal direction . It maycause dew or dust to settle on the ceiling or flap.

12.5 Setting the master user interface

12.5.1 About setting the master user interface

d d

c c

a

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d d

1 2

1 In case of VRV DX indoor units

13 Maintenance and service


28RKXYQ5T7Y1B


2 In case of VRV DX indoor units combined with an airhandling unit

a Heat exchanger unitb Compressor unitc Refrigerant pipingd User interface (dedicated depending on indoor unit type)



When the system is installed as shown in the figure above, it isnecessary to designate one of the user interfaces as the master userinterface.

The displays of slave user interfaces show (change-overunder centralised control) and slave user interfaces automaticallyfollow the operation mode directed by the master user interface.

Only the master user interface can select heating or cooling mode.

12.5.2 To designate the master user interface(VRV DX)

1 Press the operation mode selector button of the current masteruser interface for 4 seconds. In case this procedure was not yetperformed, the procedure can be executed on the first userinterface operated.

Result: The display showing (change-over undercentralised control) of all slave user interfaces connected to thesame compressor unit flashes.

2 Press the operation mode selector button of the controller thatyou wish to designate as the master user interface.

Result: Designation is completed. This user interface isdesignated as the master user interface and the displayshowing (change-over under centralised control)vanishes. The displays of other user interfaces show (change-over under centralised control).

13 Maintenance and serviceNOTICE

Never inspect or service the unit by yourself. Ask aqualified service person to perform this work.

WARNING

Never replace a fuse with a fuse of a wrong ampere ratingsor other wires when a fuse blows out. Use of wire orcopper wire may cause the unit to break down or cause afire.

CAUTION

Do not insert fingers, rods or other objects into the air inletor outlet. Do not remove the fan guard. When the fan isrotating at high speed, it will cause injury.

CAUTION

After a long use, check the unit stand and fitting fordamage. If damaged, the unit may fall and result in injury.

NOTICE

Do not wipe the controller operation panel with benzine,thinner, chemical dust cloth, etc. The panel may getdiscoloured or the coating peeled off. If it is heavily dirty,soak a cloth in water-diluted neutral detergent, squeeze itwell and wipe the panel clean. Wipe it with another drycloth.

13.1 After-sales service and warranty

13.1.1 Warranty period▪ This product includes a warranty card that was filled in by the

dealer at the time of installation. The completed card has to bechecked by the customer and stored carefully.

▪ If repairs to the air conditioner are necessary within the warrantyperiod, contact your dealer and keep the warranty card at hand.

13.1.2 Recommended maintenance andinspection

Since dust collects when using the unit for several years,performance of the unit will deteriorate to some extent. As takingapart and cleaning interiors of units requires technical expertise andin order to ensure the best possible maintenance of your units, werecommend to enter into a maintenance and inspection contract ontop of normal maintenance activities. Our network of dealers hasaccess to a permanent stock of essential components in order tokeep your air conditioner in operation as long as possible. Contactyour dealer for more information.

When asking your dealer for an intervention, always state:▪ The complete model name of the air conditioner.

▪ The manufacturing number (stated on the nameplate of the unit).

▪ The installation date.

▪ The symptoms or malfunction, and details of the defect.

WARNING

▪ Do not modify, disassemble, remove, reinstall or repairthe unit yourself as incorrect dismantling or installationmay cause an electric shock or fire. Contact yourdealer.

▪ In case of accidental refrigerant leaks, make sure thereare no naked flames. The refrigerant itself is entirelysafe, non-toxic and non-combustible, but it willgenerate toxic gas when it accidentally leaks into aroom where combustible air from fan heaters, gascookers, etc. is present. Always have qualified servicepersonnel confirm that the point of leakage has beenrepaired or corrected before resuming operation.

14 TroubleshootingIf one of the following malfunctions occur, take the measures shownbelow and contact your dealer.

WARNING

Stop operation and shut off the power if anythingunusual occurs (burning smells etc.).

Leaving the unit running under such circumstances maycause breakage, electric shock or fire. Contact your dealer.

The system must be repaired by a qualified service person:

Malfunction MeasureIf a safety device such as a fuse, abreaker or an earth leakage breakerfrequently actuates or the ON/OFFswitch does not properly work.

Turn off the main powerswitch.

If water leaks from the unit. Stop the operation.The operation switch does not workwell.

Turn off the power.

14 Troubleshooting



Malfunction MeasureIf the user interface display indicates theunit number, the operation lamp flashesand the malfunction code appears.

Notify your installer andreport the malfunctioncode.

If the system does not properly operate except for the abovementioned cases and none of the above mentioned malfunctions isevident, investigate the system according to the followingprocedures.

Malfunction MeasureIf the system does notoperate at all.

▪ Check if there is no power failure. Waituntil power is restored. If power failureoccurs during operation, the systemautomatically restarts immediately afterthe power supply is recovered.

▪ Check if no fuse has blown or breakerhas worked. Change the fuse or reset thebreaker if necessary.

If the system goes intofan only operation, butas soon as it goes intoheating or coolingoperation, the systemstops.

▪ Check if air inlet or outlet of heatexchanger unit or indoor unit is notblocked by obstacles. Remove anyobstacle and make it well-ventilated.

▪ Check if the user interface display shows (time to clean the air filter). (Refer to

"13 Maintenance and service" onpage 28 and "Maintenance" in the indoorunit manual.)

The system operatesbut cooling or heatingis insufficient.

▪ Check if air inlet or outlet of heatexchanger unit or indoor unit is notblocked by obstacles. Remove anyobstacle and make it well-ventilated.

▪ Check if the air filter is not clogged (referto "Maintenance" in the indoor unitmanual).

▪ Check the temperature setting.

▪ Check the fan speed setting on your userinterface.

▪ Check for open doors or windows. Shutdoors and windows to prevent wind fromcoming in.

▪ Check if there are too many occupants inthe room during cooling operation. Checkif the heat source of the room isexcessive.

▪ Check if direct sunlight enters the room.Use curtains or blinds.

▪ Check if the air flow angle is proper.

If after checking all above items, it is impossible to fix the problemyourself, contact your installer and state the symptoms, the completemodel name of the air conditioner (with manufacturing number ifpossible) and the installation date (possibly listed on the warrantycard).

14.1 Error codes: OverviewIn case a malfunction code appears on the indoor unit user interfacedisplay, contact your installer and inform the malfunction code, theunit type, and serial number (you can find this information on thenameplate of the unit).

For your reference, a list with malfunction codes is provided. Youcan, depending on the level of the malfunction code, reset the codeby pushing the ON/OFF button. If not, ask your installer for advice.

Main code ContentsExternal protection device was activatedEEPROM failure (indoor)Drain system malfunction (indoor)Fan motor malfunction (indoor)Swing flap motor malfunction (indoor)Expansion valve malfunction (indoor)Drain malfunction (indoor unit)Filter dust chamber malfunction (indoor)Capacity setting malfunction (indoor)Transmission malfunction between main PCB and subPCB (indoor)Heat exchanger thermistor malfunction (indoor; liquid)Heat exchanger thermistor malfunction (indoor; gas)Suction air thermistor malfunction (indoor)Discharge air thermistor malfunction (indoor)Movement detector or floor temperature sensormalfunction (indoor)User interface thermistor malfunction (indoor)Fan or drain pump malfunction (heat exchanger unit)PCB malfunction (compressor unit)Current leakage detector was activated (compressorunit)High pressure switch was activatedLow pressure malfunction (compressor unit)Compressor lock detection (compressor unit)Electronic expansion valve malfunction (compressorunit or heat exchanger unit)Discharge temperature malfunction (compressor unit)Abnormal suction temperature (compressor unit)Refrigerant overcharge detectionHigh pressure switch malfunctionLow pressure switch malfunctionAmbient temperature sensor malfunction (heatexchanger unit)Pressure sensor malfunctionCurrent sensor malfunctionDischarge temperature sensor malfunction(compressor unit)Heat exchanger gas temperature sensor malfunction(heat exchanger unit)Suction temperature sensor malfunction (compressorunit)De-icing temperature sensor malfunction (heatexchanger unit)Liquid temperature sensor (after subcool HE)malfunction (compressor unit)Gas temperature sensor (after subcool HE)malfunction (compressor unit)High pressure sensor malfunction (BIPH)Low pressure sensor malfunction (BIPL)INV PCB abnormalFin temperature abnormalInverter PCB faultyCompressor over current detectedCompressor lock (startup)Transmission compressor unit - inverter: INVtransmission trouble

14 Troubleshooting


30RKXYQ5T7Y1B


Main code ContentsINV unbalanced power supply voltageFin thermistor malfunctionHeat exchanger unit capacity setting malfunction.Abnormal low pressure drop, faulty expansion valveReversed power supply phase malfunctionINV voltage power shortageSystem test run not yet executedFaulty wiring indoor/heat exchanger unit/compressorunitAbnormal user interface - indoor communicationAbnormal main-sub user interface communicationSystem mismatch. Wrong type of indoor unitscombined. Indoor unit malfunction. Heat exchangerunit malfunction.Connection malfunction over indoor units or typemismatch (wrong type of indoor units or heatexchanger unit)Centralised address duplicationMalfunction in communication centralised controldevice - indoor unitAuto address malfunction (inconsistency)Auto address malfunction (inconsistency)

14.2 Symptoms that are not airconditioner troubles

Following symptoms are not air conditioner troubles:

14.2.1 Symptom: The system does not operate▪ The air conditioner does not start immediately after the ON/OFF

button on the user interface is pressed. If the operation lamplights, the system is in normal condition. To prevent overloading ofthe compressor motor, the air conditioner starts 5 minutes after itis turned ON again in case it was turned OFF just before. Thesame starting delay occurs after the operation mode selectorbutton was used.

▪ If "Under Centralized Control" is displayed on the user interface,pressing the operation button causes the display to blink for a fewseconds. The blinking display indicates that the user interfacecannot be used.

▪ The system does not start immediately after the power supply isturned on. Wait one minute until the micro computer is preparedfor operation.

14.2.2 Symptom: Cool/Heat cannot be changedover

▪ When the display shows (change-over under centralizedcontrol), it shows that this is a slave user interface.

▪ When the cool/heat changeover remote control switch is installedand the display shows (change-over under centralizedcontrol), this is because cool/heat changeover is controlled by thecool/ heat changeover remote control switch. Ask your dealerwhere the remote control switch is installed.

14.2.3 Symptom: Fan operation is possible, butcooling and heating do not work

Immediately after the power is turned on. The micro computer isgetting ready to operate and is performing a communication checkwith all indoor units. Please wait 12 minutes (max.) till this process isfinished.

14.2.4 Symptom: The fan strength does notcorrespond to the setting

The fan speed does not change even if the fan speed adjustmentbutton in pressed. During heating operation, when the roomtemperature reaches the set temperature, the compressor unit goesoff and the indoor unit changes to whisper fan speed. This is toprevent cold air blowing directly on occupants of the room. The fanspeed will not change even when another indoor unit is in heatingoperation, if the button is pressed.

14.2.5 Symptom: The fan direction does notcorrespond to the setting

The fan direction does not correspond with the user interfacedisplay. The fan direction does not swing. This is because the unit isbeing controlled by the micro computer.

14.2.6 Symptom: White mist comes out of a unit(Indoor unit)

▪ When humidity is high during cooling operation. If the interior of anindoor unit is extremely contaminated, the temperature distributioninside a room becomes uneven. It is necessary to clean theinterior of the indoor unit. Ask your dealer for details on cleaningthe unit. This operation requires a qualified service person.

▪ Immediately after the cooling operation stops and if the roomtemperature and humidity are low. This is because warmrefrigerant gas flows back into the indoor unit and generatessteam.

14.2.7 Symptom: White mist comes out of a unit(Indoor unit, heat exchanger unit)

When the system is changed over to heating operation after defrostoperation. Moisture generated by defrost becomes steam and isexhausted.

14.2.8 Symptom: The user interface displayreads "U4" or "U5" and stops, but thenrestarts after a few minutes

This is because the user interface is intercepting noise from electricappliances other than the air conditioner. The noise preventscommunication between the units, causing them to stop. Operationautomatically restarts when the noise ceases.

14.2.9 Symptom: Noise of air conditioners(Indoor unit, heat exchanger unit)

▪ A "zeen" sound is heard immediately after the power supply isturned on. The electronic expansion valve inside an indoor unitstarts working and makes the noise. Its volume will reduce inabout one minute.

▪ A continuous low "shah" sound is heard when the system is incooling operation or at a stop. When the drain pump (optionalaccessories) is in operation, this noise is heard.

▪ A "pishi-pishi" squeaking sound is heard when the system stopsafter heating operation. Expansion and contraction of plastic partscaused by temperature change make this noise.

▪ A low "sah", "choro-choro" sound is heard while the indoor unit isstopped. When another indoor unit is in operation, this noise isheard. In order to prevent oil and refrigerant from remaining in thesystem, a small amount of refrigerant is kept flowing.

15 Relocation



14.2.10 Symptom: Noise of air conditioners(Indoor unit, compressor unit, heatexchanger unit)

▪ A continuous low hissing sound is heard when the system is incooling or defrost operation. This is the sound of refrigerant gasflowing through the compressor unit, heat exchanger unit andindoor units.

▪ A hissing sound which is heard at the start or immediately afterstopping operation or defrost operation. This is the noise ofrefrigerant caused by flow stop or flow change.

14.2.11 Symptom: Noise of air conditioners(compressor unit, heat exchanger unit)

When the tone of operating noise changes. This noise is caused bythe change of frequency from the compressor or the fans.

14.2.12 Symptom: Dust comes out of the heatexchanger unit

When the unit is used for the first time in a long time. This isbecause dust has gotten into the heat exchanger unit.

14.2.13 Symptom: The units can give off odoursThe unit can absorb the smell of rooms, furniture, cigarettes, etc.,and then emit it again.

14.2.14 Symptom: The heat exchanger unit fandoes not spin

During operation. The speed of the fan is controlled in order tooptimise product operation.

14.2.15 Symptom: The display shows "88"This is the case immediately after the main power supply switch isturned on and means that the user interface is in normal condition.This continues for one minute.

14.2.16 Symptom: The compressor in thecompressor unit does not stop after ashort heating operation

This is to prevent refrigerant from remaining in the compressor. Theunit will stop after 5 to 10 minutes.

14.2.17 Symptom: The inside of an compressorunit is warm even when the unit hasstopped

This is because the crankcase heater is warming the compressor sothat the compressor can start smoothly.

14.2.18 Symptom: Hot air can be felt when theindoor unit is stopped

Several different indoor units are being run on the same system.When another unit is running, some refrigerant will still flow throughthe unit.

15 RelocationContact your dealer for removing and reinstalling the total unit.Moving units requires technical expertise.

16 DisposalThis unit uses hydrofluorocarbon. Contact your dealer whendiscarding this unit. It is required by law to collect, transport anddiscard the refrigerant in accordance with the "hydrofluorocarboncollection and destruction" regulations.

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4P408443-1 2015.07

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