Appliance Documentation UIKP 1550 from -20A UIKP 1554...

Service Documentation

Customer Service

Service Manual No. 14/2018 Version 01 LHG/CS-Un/17.04.18

Page 1/24 14201801SM_en.docx

Appliance Documentation

UIKP 1550 from -20A Premium, A+++

UIKP 1554 from -20A Premium, A+++, 4-star freezer compartment

Built-under fridge with/without 4-star freezer compartment for

door-on-door system

UIKP 1550

UIKP 1554

Service Manual No. 14/2018 Version 01 UIKP 1550, 1554 from -20A

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Legal Notice

© 24.01.2017 Liebherr-Hausgeräte Ochsenhausen GmbH. All rights reserved.

No part of this documentation may be reproduced or processed, duplicated or distributed by means of electronic systems in any form whatsoever (print, photocopy or any other process) for purposes other than personal use without the written consent of Liebherr- Hausgeräte Ochsenhausen GmbH.

Liebherr-Hausgeräte Ochsenhausen GmbH reserves the right to change or amend the documentation at any time without prior notice. Liebherr-Hausgeräte Ochsenhausen GmbH assumes no liability for printing errors and ensuing damages.

Other brand or product names contained in this document are the brands of the respective holders of the rights and are hereby recognised as such.

Liebherr-Hausgeräte Ochsenhausen GmbH, Memminger Straße 77-79, 88416 Ochsenhausen, Germany, Phone +49 7352 928-0, E-Mail: [email protected], Internet: home.liebherr.com


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Contents 1.0 Operating and control elements ............................................................................................... 4 2.0 Functions at a glance ................................................................................................................. 4 3.0 Description of Appliance ........................................................................................................... 5

3.1 Sensor positions, schematic diagrams ......................................................................................... 5 4.0 Main components and their functions ...................................................................................... 6

4.1 Electrical components and functions ............................................................................................ 6 4.1.1 General .................................................................................................................................................. 6 4.1.2 Refrigerator compartment ..................................................................................................................... 7

4.2 Refrigeration components and functions ...................................................................................... 8 4.2.1 General .................................................................................................................................................. 8 4.2.2 Refrigerator compartment ..................................................................................................................... 8 4.2.3 Principle of operation of the refrigerating system .................................................................................. 8

5.0 Assembly instructions / Parts replacement ............................................................................. 9 5.1 General ......................................................................................................................................... 9

5.1.1 Electronics ............................................................................................................................................. 9 5.1.2 Door mounting ..................................................................................................................................... 10 5.1.3 Door magnet ........................................................................................................................................ 11 5.1.4 Door seal ............................................................................................................................................. 12 5.1.5 Evaporation tray .................................................................................................................................. 12 5.1.6 Base fan .............................................................................................................................................. 13

5.2 Refrigerator compartment ........................................................................................................... 14 5.2.1 LED lighting ......................................................................................................................................... 14 5.2.2 Air sensor ............................................................................................................................................ 15 5.2.3 Evaporator sensor ............................................................................................................................... 15 5.2.4 UIK 1514 evaporator door ................................................................................................................... 16

6.0 Technical Data .......................................................................................................................... 17 6.1 General ....................................................................................................................................... 17

7.0 Service menu ............................................................................................................................ 18 7.1 Brief overview of service menu ................................................................................................... 18 7.2 Demo mode D ........................................................................................................................... 19 7.3 Panel test (control panel test) P ................................................................................................. 20 7.4 Sensor test (display of temperature) and door contact test E- .................................................. 21 7.5 Service mode L .......................................................................................................................... 22

8.0 Error code, troubleshooting .................................................................................................... 23 8.1 Table of error codes ................................................................................................................... 23 8.2 VCC compressor Diagnostic LED .............................................................................................. 24

8.2.1 Activation of diagnostic LED ............................................................................................................... 24 8.2.2 Diagnostic LED flash codes ................................................................................................................ 24


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1.0 Operating and control elements

Refrigerator 1 ON/OFF ON/OFF button for appliance 2 SuperCool SuperCool function 3 Temperature display 4 Up/Down Setting button temperature warmer/colder 5 Alarm Acknowledge alarm

2.0 Functions at a glance Control: Electronics

Temperature display: Target value

Temperature range: +2 °C to +9 °C

SuperCool Featured

Temperature alarm: Not featured

Door alarm: Featured

Defrosting: Automatic

LED interior light: Featured

Service menu: Featured

Fan: Featured (base fan)

Compressor: AC protocol

UIKP 1554 Winter mode:

Automatic

1 2 3 4 5


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3.0 Description of Appliance The UIKP 1550 and the UIKP 1554 are built-under fridges for door-on-door system. The appliances are controlled using series 4 electronics with air sensor and evaporator sensor. The appliances are cooled using a foamed-in rear wall evaporator. The 4-star freezer compartment on the UIKP 1554 is also equipped with a wrapped evaporator tube.

3.1 Sensor positions, schematic diagrams

Fig. 3.1/ 1 UIKP 1550 front view Fig. 3.1/ 2 UIKP 1550 side view section Fig. 3.1/ 3 UIKP 1554 front view Fig. 3.1/ 4 UIKP 1554 side view section

Foamed-in evaporator sensor

Air sensor

Electronics

Ambient air sensor

LED interior light

Foamed-in rear wall evaporator

Base fan

Foamed-in evaporator sensor

Electronics

Base fan

Ambient air sensor

LED interior light

Foamed-in rear wall evaporator

Foamed-in evaporator tube

Air sensor

Winter mode heater


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4.0 Main components and their functions

4.1 Electrical components and functions

4.1.1 General

Electronics

Type: Series 4 electronic control system

Components: Integral electronics

Sensors

Ambient air sensor: Position: On integral electronics

Function: Impact on temperature control

UIKP 1554: Also switches the winter mode heater ON and OFF

Info: An ambient air sensor error is only displayed in the service menu. In the case of a defect, the integral electronics must be replaced.

Compressor

Type: VCC compressor, AC protocol

Function: ON: Evaporator sensor switch-on value Note: Switch-on delay time (8 min) must have elapsed.

OFF: Air sensor switch-off value

VCC compressor, AC protocol – Compressor with various speed levels. – The compressor is triggered via an inverter, the inverter electronics are mounted directly on the compressor. The inverter receives a control command from the appliance electronics. – Appropriate command signals in the AC protocol control the compressor speed levels and switch-off. These commands are sent cyclically depending on the type of command. Note: If commands are absent or not recognised, the compressor will continue to run at a pre-specified speed level! Function test see chapter 7.5: Customer service mode

Troubleshooting, see Chapter 8.2: VCC compressor diagnostic LED

Base fan

Position: On the rear side in the appliance base, between the compressor and condenser.

Function: ON: When compressor is running, – At low speed when ambient temperature is below 10 °C. – At medium speed when ambient temperature is below 36 °C. – At high speed when ambient temperature is above 36 °C.


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4.1.2 Refrigerator compartment

Electronics

Setting range: +2 °C to +9 °C

Display range: +2 °C to +9 °C (target value display)

Functions

SuperCool: ON: Refrigerator compartment sets itself to +2 °C for 12 hours.

OFF: Refrigerator compartment adjusts itself to the set target value.

Defrosting: Automatic, while the compressor is in stand-by.

Temperature alarm: Not featured

Door alarm: When: After 60 seconds if the door is open.

Audible: 3 beeps

Visual: Not featured

Sensors

Air sensor: Position: Behind the air sensor cover, on the left rear bottom side of the interior.

Function: Switches the compressor OFF.

Evaporator sensor: Position: Foamed-in, above the defrost water drain. Sensor position, see schematic diagram Fig. 3.1.

In spare parts case: Behind service air sensor cover

Function: Switches the compressor ON. Ends the defrost phase.

Switches

Door switch: Position: Behind the front panel, underneath the temperature display. On the integral electronics, not replaceable separately.

Type: Magnetic field sensor

Function: Activation via: Magnet in the door, magnet is not replaceable.

Switching signal when:

Door closed: Interior light OFF

Door open: Interior light ON Door alarm ON after 60 s.

Consumers / Loads

LED interior light: Position: UIKP 1550: Inside ceiling, central.

Position: UIKP 1554: Inside left, beneath the 4-star compartment

Function: Lights up as soon as door is opened. Is switched OFF after door has been open for 15 minutes.

Winter mode heater (only UIKP 1554)

Position: Foamed-in on the inside left of the side wall. Beneath LED interior light.

Function: Triggered at an ambient temperature below 18 °C while the compressor is stationary. Causes longer compressor runtimes which ensures that the temperature in the 4-star freezer compartment is kept more constant.


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1

3

4

5 2

4.2 Refrigeration components and functions

4.2.1 General

Compressor

Compressor: VCC compressor, AC protocol

4.2.2 Refrigerator compartment

Evaporator

Type of appliance: UIKP 1550: Rear wall evaporator UIKP 1554: Wrapped evaporator tube and rear wall evaporator

Type of installation: UIKP 1550: Foamed-in UIKP 1554: Foamed-in

Injection point: UIKP 1550: Top middle UIKP 1554: Front of the 4-star freezer compartment

Flow sequence: UIKP 1550: From the top centre downwards.

UIKP 1554: From the front to the back in the 4-star freezer compartment, then into the refrigerator compartment at the top centre to the bottom.

4.2.3 Principle of operation of the refrigerating system

Fig. 4.2.3 / 1 1 Compressor 2 Condenser 3 Dryer 4 Evaporator 5 4-star freezer compartment evaporator

2

1

3

4

UIKP 1550 UIKP 1554


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5.0 Assembly instructions / Parts replacement

5.1 General

5.1.1 Electronics

DANGER

Dangerous voltage! Danger to life ► Ensure that the appliance is de-energised.

Cover: – Disengage the covers at the marked locations (Fig. 5.1.1/ 1+2). Front housing: – Disengage the electronics at the marked locations (Fig. 5.1.1/ 3+4).

– Draw the electronics forwards for removal. – Unlock and pull off the connector (Fig. 5.1.1/ 5+6).

Fig. 5.1.1/ 1 Fig. 5.1.1/ 2 Fig. 5.1.1/ 3 Fig. 5.1.1/ 4 Fig. 5.1.1/ 5 Fig. 5.1.1/ 6


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5.1.2 Door mounting

Top door hinges: – Remove cover (Fig. 5.1.1/ 2). – Undo fastening screws (approx. 1 cm), do not unscrew completely (Fig. 5.1.2/ 1). Remove the door when the screws are undone but still in place. – After removing the door, unscrew the fastening screws completely and slide the

metal bracket upwards to remove (Fig. 5.1.2/ 2). – Mount metal brackets for changing the door hinges onto the opposite side and screw in the screws, leaving 1 cm (Fig. 5.1.2/ 3+4). – Insert the door and tighten screws.

Fig. 5.1.2/ 1 Fig. 5.1.2/ 2

Fig. 5.1.2/ 3 Fig. 5.1.2/ 4 Lower door hinges: – Remove cover (Fig. 5.1.2/ 5).

– Undo fastening screws (approx. 1 cm), do not unscrew completely (Fig. 5.1.2/ 6). Remove the door when the screws are undone but still in place. – After removing the door, unscrew the fastening screws completely. – Screw in the screws on the opposite side, leaving 1 cm (Fig. 5.1.2/ 7). – Insert the door and tighten screws.

Fig. 5.1.2/ 5 Fig. 5.1.2/ 6 Fig. 5.1.2 / 7


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Soft stop mechanism: – Lever the soft stop mechanism off the spherical head with a screwdriver (Fig. 5.1.2/ 9).

– Undo the screw on the hinge (Fig. 5.1.2/ 10).

Spherical head: – Undo the spherical head using an open-ended spanner or Torx screwdriver and screw into the opposite side (Fig. 5.1.2/ 9).

Fig. 5.1.2/ 8 Fig. 5.1.2/ 9 Fig. 5.1.2/ 5 Fig. 5.1.2/ 6 5.1.3 Door magnet

Door magnet: – The door magnet is foamed-in within the door, cannot be replaced. – Above the door seal, beneath the mounting brackets (Fig. 5.1.3/ 1). Fig. 5.1.3 / 1


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5.1.4 Door seal

Removing the door seal: – Remove the door seal from the groove at the top and bottom corners (Fig. 5.1.4/ 1). – Circumferentially pull out the door seal (Fig. 5.1.4/ 2). Installing the door seal: – Insert the new door seal into the top and bottom corners (Fig. 5.1.4/ 1). – Circumferentially insert the door seal. Fig. 5.1.4/ 1 Fig. 5.1.4/ 2 5.1.5 Evaporation tray

Position: – On the rear side in the appliance base, beneath the condenser. Height-adjustable feet: – Unscrew the height-adjustable feet to the maximum position. Evaporation tray: – Unscrew the fastening screws (Fig. 5.1.5/ 1).

– Disengage the evaporation tray at the marked locations (Fig. 5.1.5/ 2). – Pull the evaporation tray towards the rear by approx. 1 cm and set aside in adownward direction (Fig. 5.1.5/ 3).

Fig. 5.1.5/ 1 Fig. 5.1.5/ 2

Fig. 5.1.5 / 3


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5.1.6 Base fan

DANGER

Dangerous voltage! Danger to life ► Ensure that the appliance is de-energised.

Support: – Disengage the compressor recess at the marked locations (Fig. 5.1.6/ 1)

and pull off towards the rear. Cables and connectors: – Disengage the pressure cable and the capillary tube from the base fan cover

(Fig. 5.1.6/ 2). – Unlock and pull off connector (Fig. 5.1.6/ 2).

Cover: – Disengage the base fan cover and pull off towards the rear

(Fig. 5.1.6/ 3). Base fan: – Pull the base fan off towards the rear (Fig. 5.1.6/ 4). Fig. 5.1.6/ 1 Fig. 5.1.6/ 2 Fig. 5.1.6/ 3 Fig. 5.1.6/ 4


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5.2 Refrigerator compartment

5.2.1 LED lighting

UIKP 1550 Lighting unit: – Undo the lighting unit locking device by turning it slightly and

pull off downwards (Fig. 5.2.1/ 1). – Remove the connector (Fig. 5.2.1/ 2). Fig. 5.2.1/ 1 Fig. 5.2.1/ 2 UIKP 1554 Light housing: – Undo the light housing locking device at the marked position by turning it slightly

and remove towards the inside (Fig. 5.2.1/ 3). – Remove the connector (Fig. 5.2.1/ 4). Lighting unit: – Unlock the lighting unit and lift out in an upward direction (Fig. 5.2.1/ 5). Holder: – Undo the holder locking device by levering it off (Fig. 5.2.1/ 6). Fig. 5.2.1/ 3 Fig. 5.2.1/ 4 Fig. 5.2.1/ 5 Fig. 5.2.1/ 6


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5.2.2 Air sensor

Air sensor cover: – Undo the air sensor cover at the marked location. (Fig. 5.2.2/ 1). Air sensor repair: – Repair the sensor (see the repair instructions and the associated repair kit).

(Fig. 5.2.2/ 2). (Fig. 5.2.2/ 1) (Fig. 5.2.2/ 2) 5.2.3 Evaporator sensor

Air sensor cover: – Undo the air sensor cover at the marked location. (Fig. 5.2.3/ 1). Evaporator sensor repair: – Cut off the evaporator sensor cable at the black marked line

(Fig. 5.2.3/ 2). – Repair the sensor (see the repair instructions and the associated repair kit).

(Fig. 5.2.3/ 1) (Fig. 5.2.3/ 2)


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5.2.4 UIK 1514 evaporator door

Evaporator door: – Undo the right cover at the marked location and pull off downwards (Fig. 5.2.4/ 1+2). – Same procedure on the left hand side.

– Pull off the evaporator door towards the front. Handle plate: – Undo the handle plate on one side at the marked location (Fig. 5.2.4/ 3).

– Undo the upper locking catches as the marked locations (Fig. 5.2.4/ 4). (Fig. 5.2.4/ 1) (Fig. 5.2.4/ 2). (Fig. 5.2.4/ 3) (Fig. 5.2.4/ 4).


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6.0 Technical Data

6.1 General

Sensor values: Air and evaporator sensors

Temperature [°C] Resistance value [kOhm]

+35 3.1

+30 3.8

+25 4.7

+20 5.9

+15 7.3

+10 9.3

+5 11.9

0 15.3

-5 19.8

-10 25.9

-15 34.1

-20 45.3

-25 60.8

-30 82.3

-35 112.8

LED interior light: UIKP 1550: Output: 2 watts Voltage: 12 volts/DC

UIKP 1554: Output: 2 watts Voltage: 13 volts/DC

Condenser fan: Output: 2 watts Voltage: 8–12 volts/DC Low speed: 8 volts/DC Medium speed: 10 volts/DC High speed: 12 volts/DC

Winter mode heater UIKP 1550: Not featured

UIKP 1554: Output: 7 watts Voltage: 230 volts/AC


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7.0 Service menu The service menu may only be used by service engineers.

Service menu activation: Appliance must be switched on. Press “ON/OFF” + “Up/Down” simultaneously for about 5 seconds. Once the service menu is activated, “MENU” flashes in the display. 7.1 Brief overview of service menu

Activation Press “ON/OFF” + “Up/Down” simultaneously for about 5 seconds

Service menu Menu Action Sub-menu

ActionSelection of

functional part Demo mode

Up

/ Do

wn

bu

tto

n

D 1x SC* D1/D0 1x SC Demo Mode ON / OFF

Panel test (control panel test) P 1x SC P1 1x SC Press sensor buttons, door sensor

Sensor test

E- 1x SC Ed 1x SC

U

p/D

ow

n

d1 : Refrigerator compartment

d2 : Refrigerator compartment evaporator sensor

d7 : Ambient air sensor

dA : Refrigerator compartment door contact

Service mode

L 1x SC Ld 1x SC

Up

/Do

wn

d0 : All OFF

d1 : Compressor ON, ..low speed

d2 : Compressor ON, ..high speed

d5 : Refrigerator compartment light ON

d6 : Winter mode heater (only UIKP 1554)

dR : Condenser fan ON (low speed)

dU : Condenser fan ON (high speed) * SC=SuperCool


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7.2 Demo mode D

Step Display Action Display following action

Testing option / Info

Start service menu --Demo mode ON--

1 Target value

Press “ON/OFF” and “Up/Down” simultaneously for 5 seconds

D flashes Service menu activeDemo mode selected

2 D flashes Press “SuperCool” once D1static Demo mode ON selected

3 D1static Press “SuperCool” once Set target value and “Demo”

Demo mode ON

Start service menu --Demo mode OFF--

1 Target value and “Demo”


D flashes and “Demo” Service menu activeDemo mode selected

2 D flashes and “Demo” Press “SuperCool” once D0static and “Demo” Demo mode OFF selected

3 D0static and “Demo” Press “SuperCool” once Target value Demo mode OFF

In the display, the text “Demo” provides information of the activated demo mode. Demo mode can only be deactivated via the service menu, not by OFF / ON or disconnection from the power supply. The required mode, demo or normal, is switched to as soon as “SuperCool” is pressed.


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7.3 Panel test (control panel test) P



Start service menu

1 Target value


D flashes Service menu active

Control panel test -- Test of sensor buttons, display elements, door sensor and beep --

2 D flashes Press “Up/Down” once P flashes Control panel test selected

3 P flashes Press “SuperCool” once P1static Control panel test activated

4

P1static Press “SuperCool” once zz All symbols/

segments

Display elements/sensors More symbols are displayed than are used by the respective electronics.

5 zz All symbols/ segments

Door closed/open and press all buttons one after the other (each operation is confirmed by beep)

– Beep for 2 seconds – Appliance switches OFF

After the last button has been pressed a beep sounds for 2 seconds, but only if the test was successful.

Termination

Control panel test cannot be terminated, e.g. in the 2nd step; it has to be performed in full. Should a button/sensor be defective, there will be no 2-second beep and the appliance will not switch OFF. The appliance then has to be unplugged and plugged back in again.

All settings are returned to factory settings. Return to normal/control mode.


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7.4 Sensor test (display of temperature) and door contact test E-



Start service menu

1 Target value



Sensor test and door contact test (sensor values without offset, appliance in control mode)

2 D flashes Press “Up/Down” twice E-flashes Sensor test mode selected

3 E-flashes Press “SuperCool” once Edstatic Sensor test mode activated

4 Edstatic Press “SuperCool” once d1flashes alternately with sensor temperature

Refrigerator compartment air sensor

5 d1flashes alternately with sensor temperature

Press “Up/Down” once d2 flashes alternately with sensor temperature

Refrigerator compartment evaporator sensor

6 d2 flashes alternately with sensor temperature

Press “Up/Down” once d7 flashes alternately with sensor temperature

Ambient air sensor

7 d7 flashes alternately with sensor temperature

Press “Up/Down” once dAflashes alternately

with OP or gL

Refrigerator compartment door contact (OP=door open, gL=door closed)

Termination Press “ON/OFF” once: Return to level 2 Ed. No further options can be selected for this appliance. Press “ON/OFF” twice: Return to level 1 E-. Points: D.P.E-.L selectable. Press “ON/OFF” three times: Return to normal/control mode.


Page 22/24

7.5 Service mode L



Start service menu

1 Target value



Service mode -- Testing electric loads --

Output

2 D flashes Press “Up/Down” three times L flashes Service mode selected

3 L flashes Press “SuperCool” once Ldstatic Service mode activated

4 Ldstatic Press “SuperCool” once d0static All OFF Electronic control system active

1.1 W*

5 d0static Press “Up/Down” once d1static Compressor ON, low speed

--

6 d1static Press “Up/Down” once d2static Compressor ON high speed

--

7 d2static Press “Up/Down” once d5static Light ON

UIKP 1550 3.6 W* UIKP 1554 3.9 W*

UIKP 1554 d5static Press “Up/Down” once d6static Winter mode heater ON

8.4 W*

8 d5static or

d6static Press “Up/Down” once dRstatic

Condenser fan ON Low speed

1.5 W*

9 dRstatic Press “Up/Down” once dUstatic Condenser fan ON High speed

2.1 W*

Termination Press “ON/OFF” once: Return to level 2 Ld. No further options can be selected for this appliance. Press “ON/OFF” twice: Return to level 1 L . Points: D.P.E-.L selectable. Press “ON/OFF” three times: The appliance will carry out a reset

* Values were determined using CLM1000 measuring device.


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8.0 Error code, troubleshooting 8.1 Table of error codes

Error code Defective component Emergency mode

Appliance Refrigeration ON Refrigeration OFF

F1 Air sensor UIKP 1550

UIKP 1554

6 min

15 min

26 min

46 min

F2 Evaporator sensor UIKP 1550

UIKP 1554

6 min

15 min

26 min

46 min

F7 Ambient air sensor* UIKP 1550

UIKP 1554 No emergency mode: An ambient temperature of 25 °C is assumed

* Note: Ambient air sensor error is only tested and displayed in the panel test (control panel test) P of the service menu.


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8.2 VCC compressor Diagnostic LED

8.2.1 Activation of diagnostic LED

A green LED may flash through the light-permeable front cover of the VCC inverter. The diagnostic LED is activated of 60 minutes (diagnosis period) after activating the service mode Ld. If a valid command is recognised, the LED flashes once. If no valid command is recognised, the LED flashes twice. As long as the inverter control does not detect an error and the diagnosis period is not active, no information will be issued via the diagnostic LED.

Fig. 8.2.1/ 1 Inverter diagnostic LED “OFF” Fig. 8.2.1/ 2 Inverter diagnostic LED “ON” 8.2.2 Diagnostic LED flash codes

Code Cycle Meaning Flashes twice 5 s Invalid or no command received (> 30 min) Flashes three times 5 s Inverter error or break in coil Flashes four times 5 s Compressor errors

Error codes have to be processed in succession. Once an error code has been processed, a new error code may appear.

Date post:	26-Jul-2021
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