SERVICE MANUALMULTI ROLLER EXModel:MR26-4EMR26-8EMR26-12EMultiple Air CompressorsAutomatic ControllerCharacteristics of this ManualThis manual expresses the matters that need your attention as below.Do not fail to observe "WARNING" and "CAUTION", as they assume considerableimportance to safety.What Marks Say:WARNING CAUTIONThis is a warning. This assumespossible death or severe injury tothe operator if handled wrongly.This is a caution. This assumespossible injury to the operator andphysical damage, if handledwrongly.This means the things that need attentionother than WARNING and CAUTION.IMPORTANT 1. SAFETY AND LIMITED WARRANTY 22. SPECIFICATIONS OF THE PRODUCT 43. PARTS DESCRIPTION 63.1 Dimensions 63.2 Structure 63.3 Names of the operation parts and monitor parts 84. PREPARATION AND OPERATION 94.1 Notes for electrical installation work 94.2 External interfaces with connection terminals of MULTI ROLLER 94.3 Wiring diagram 104.4 Preparation and operation 114.5 Main menu and setting screens124.6 Maintenance menu and setting screens185. DESCRIPTION OF CONTROL OPERATION 235.1 Basic functions and operations 235.2 Detail of pressure setting 245.3 Pressure control flow 245.4 Detail of pressure setting and timer setting 256. CONFIRM THE SETTING CONTENTS 266.1 Setting and Initial valve 266.2 Pressure Setting 286.3 Maintenance Setting296.4 Slave Unit Switch 317. LIST OF FAILURES AND ALARMS 327.1 Indication of alarms and failure on the Failure History screen 327.2 About restart after power failure and instantaneous power failure 338. KEY POINTS FOR USE 358.1 Connection example of compressor and auxiliaries (MR26-8) 358.2 Capacity control processing method for compressors 358.3 Precautions on setting and pressure prediction for single stage Type-V DSP368.4 Noise to MULTI ROLLER 368.5 Start/Stop conditions for MULTI ROLLER (after improvement)378.6 Precautions on Weekly Timer389. MAINTENANCE AND INSPECTION 399.1 Regular maintenance 399.2 Names of the parts 39CONTENTS11.SAFETY AND LIMITED WARRANTY2WarningWarningWarningWarning Asqualifiedpersonsarerequiredforinstallationofelectricalequipment,theinstallationworkshouldbeperformedonlybyqualifiedpersons.Electricalinstallationworkbyanyunqualified person may cause defective of the equipment, resulting in electrical shock. Noisefilterisused.Theequipmentshouldbeproperlygroundedintheearthusingstan-dard to prevent electrical shock. Beforeopeningthepanelforwiringworkandinspection,alwaysdisconnectthepowersupply to prevent electrical shock. Also, before any work on the inverter compressor (typeV), always check that the charge lamp of the inverter is turned off. Place the warning plateon the power supply side, such as Inspection. Do not turn on the power. to prevent thepower from being carelessly turned on during inspection work.NotethatthesystemcontrolofcompressorswillberestartedbystartingcommandfromtheMULTIROLLERatpoweronevenafterpowerfailureforlongtime,if"ON"issetforMULTIROLLER"restartafterpowerfailure(IPIAuto)."Also,whenmaintenance,etc.ofcompressorsisrequired,alwayssettheMULTIROLLERcompressorsettingto"Solo,"remotesettingonthecompressorsideto"Local,"stopthecompressors,disconnectthepower supply, and place the labels "Maintenance work," "Strictly prohibit to turn on," etc.on the earth leakage breakers, before any work. When drilling a hole on the MULTI ROLLER, pay attention not to take in any chips into thepanel.Solooperationofeachcompressorcannotbeactivatedonlybysetting"Solo"forcom-pressor on the MULTI ROLLER side. Always set the remote setting on the compressor sidefrom "Remote" to "Local." Also, as some models need setting change on the compressorsfor other operations, change the setting referring to this service manual.WarningFor safety purposes, the work such as the stopper cock work must always be performed bytwo workers.Also,whenoperatingthecustomer'sfacilitiesinoperation,graspthesystemfullyandoperate it in the presence of the customer.31. SAFETY AND LIMITED WARRANTYLimited WarrantyWarranty PeriodThewarrantyperiodis12(twelve)calendarmonthsafterthedateoftheproductdeliveryor18(eighteen)calendarmonthsafterthedateoftheproductshipping(asindicatedbythebilloflading),whicheverpassesearlier.Limitation of the WarrantyInthewarrantyperiod,HIESwillonlysuppliesthereplacementpartsorproduct.However,thisisonlyappliedifthey break down in the correct usage condition, according to Instruction Manual and the notification on the productlabel on tne product.This Limited Warranty does not extend in the following cases.(1) Product over the warranty period.(2) Product failed or damaged as a result of misuse or negligence of warnings, cautions and instructions asindicated on the labels on the product and the Instruction Manual.(3) ProductfailedordamagedasaresultofrepairormodificationbyanyoneotherthanHIESandanauthorized HIES distributor, who is not professional with the product.(4) Product failed or damaged as a result of fire, earthquake, flood, thunderbolt or any other natural disasterand the use of abnormal power supply voltage (higher or lower than the rated voltage 10%).(5) Product failed or damaged as a result of the use in abnormal environmental conditions as follows:Installation location: Outdoors.Ambient temperature: Lower than 0 degree C or higher than 40 degree C.Ambient humidity: Higher than 85%.Other environment which does not satisfy the conditions of installation.HIESshallnotbeliableforanyindirectorconsequentialdamagescausedbythefailedproduct,includinganylost production or sales.Contact with your dealer, if the product fails during use.2. SPECIFICATIONS OF THE PRODUCT4 Standard specificationsModel MR26-4 MR26-8 MR26-12EnvironmentUsing place IndoorTemperature 0-40 deg.C.Power Single phase AC85 to 240VFrequency 50/60HzControlled compressor unit qty. 4 8 12Touch panel Color LCD 5.7 inchControl functionInitial Pump up, 1st unit selection, Rotary operation,Turnback operation (exclusive for constant speed unit),PID control (exclusive for V-type), Pressure predict control,Second pressure setting. Weekly scheduled operation,IPI auto restart (selectable), Auto/Solo*),Peripheral equipment operation control (air dryer, cooling water pump),Shutdown history indication, Remote control,Forced start-up (forced rotation)InputDischarge pressure 0 to 1MPa (digital indication)Control Answer (operation), FailureExternal Start, Stop, Forced start-upOutputControl Run, Stop, Load, PID commandExternal Remote, Run, Failure, Pressure dropControlled discharge pressure range Minimum 0.001MPa settingPower capacity 38 to 48 VA 44 to 61 VA 50 to 74 VADimensions (mm)(widthdepthheight)400200600 500200900 5002001,200Weight 19kg 32kg 37kgCoating color Munsell No.5Y7/1, medium gloss) Solo: Stand-alone unit operation52. Specifications of the product Input and outputMaster boardSlave boardName Specification DescriptionInputRemote start signal ON pulse When Remote is selected, MULTI ROLLER is started with this signal ON.Remote stop signalExternal forted start-upsignalON pulseON pulseWhen Remote is selected, MULTI ROLLER is stopped with this signal ON.ThenextstartunitisforcedtostartwiththissignalON(thenumberofunits in start can be set).Pressure signal DC420mA Inputs pressure sensor signal (0-1MPa).Flow signal DC420mA Flow sensor needs to be separately connected (optional).OutputOperating signal Level This signal is turned ON when MULTI ROLLER is in operation.Remote control signal Level This signal is turned ON when MULTI ROLLER is operated as remote control.Pressure drop signal Level This signal is turned ON when it becomes Low press. alarm.Failures signal Level This signal is turned ON when Low press. alarm, compressor failure, system failure, or communication failure.Pressure signal DC420mA Outputs pressure sensor signal (0-1MPa).Flow signal DC420mA Functions when flow sensor is connected.Name Specification DescriptionInputOperation answer signal ON level ON when compressor is in operation.Failure signal ON level ON when compressor is faulty.Spare signal ON level Not used.Power signal ON pulse Power sensor needs to be separately connected (optional).Analog signal DC420mA 2 points not used.OutputStart command a-contact pulseON when compressor start is commanded (pulse output withlength of 1.5 sec.)Stop command b-contact pulseON when compressor stop is commanded (pulse output withlength of 1.5 sec.)Capacity control signal c-contact levelWhen compressor is loaded or unloaded, relay status can beswitched depending on output and parameters.Compressor status output signal LevelEitherofONwhenAutoselected,ONwheninoperation,orONwhenfailurecanbeselectedforcompressorstatus.Inverter unit to which Auto is selected is forced to be ON.Frequency (PID) signal DC420mA Outputs speed command to the inverter compressor.Analog signal DC420mA Not used.3. PARTS DESCRIPTION64-10Mount holeAir intake port(PT1/4)(Snap lock with key)4-10(Mount hole)C-1083W-60W 200170 30H-60HW-60WH-60HMULTI ROLLER EXTYPE MR26MULTI ROLLER EXTYPE MR26!!A-475-A-2-1(Flat swing handle)Touch panel monitorPower lampFig 1.MR26-4, MR26-8Fig 2.MR26-12Power lampTouch panel monitor3.1 Dimensions3.2 Structure(1)Interior detail (MR26-4)R S F1 2Noise filter90(PT1/4) BWTBWM170ARS3 ARS4 ARS1 ARS2Pressure sensorAir intake port(4units)Slave units Master boardAVR(For 5VDC)AVR(For 24VDC)Input/output terminal blockPower supply terminal blockBolt for grounding (2-M6)Wiring supportDimensions Table W H D FigureMR26-4 400 600 200Figure1MR26-8 500 900 200MR26-12 500 1200 200 Figure23. PARTS DESCRIPTION7(2)Interior detail (MR26-8)(3)Battery connection setting and checking of the master boardTurn the power switch after connecting the power supply.DIP switchSW2: All ON (Up)SW3: #1 and #4 ON (Up) #6 ON (Battery ON, Up)TM2: Input/output terminal block for external operationMaster boardWhen shipped, battery switch is turned ON. Always check the setting before use. Set thepresentdateandtimebeforeuse.Allsetvaluesaresettheirinitialvalues.Changethesettings as required for the compressors referring to the setting items.R S FARS3 ARS4 ARS1 ARS290170BWTBWM(PT1/4)Air intakeNoise filterPressure sensorMaster boardAVR(For 24VDC)AVR(For 5VDC)(8units)Slave units Eight compressors or six compressors and two dryers, total 8 units, can be controlled. However, for pump or dryer unit, only start/stop function is available.For 12 units, additional 4 units are added. Accordingly, the box becomes higher.Power supply terminal blockBolt for grounding (2-M6)Wiring supportInput/output terminal block83. PARTS DESCRIPTION3.3 Names of the operation parts and monitor parts!5!8e !4!6!7!0 !1 !2 !3Compressor operation monitor screen Compressor operation screent yu e worq iThe compressor operation screen and the compressor operation monitor screen are displayed by pressing the buttons on the Main menuscreen. Table 2 Details of operation parts and monitor partsNO. Name Operation and application Main menu button This is operated to switch to the menu screen. Remote control On/Off lamp & buttonTogglestheoperationsitetotheremotesideorthesystemside.TheOnbutton is in red when set to the remote/on side or off button is in blue whenset to the remote/off side. System control On/Off lamp & buttonStartsorstopssystemcontroloperation.Onbuttonisinredwhensystemcontrol operation or Off button is in green when stopped.Units in operation are sequentially stopped by pressing red Off button duringthe system control operation. Unit No. indicator Indicates the unit number (sample: C1 is the compressor No.1). Solo/Auto switch lamp & buttonToggleseachunittosoloorautosetting.Solobuttonisinbluewhensettosolo or the Auto button is in red when set to auto. Stop/Run switch lamp & buttonThisisoperatedtorunorstopeachunitwhensettosoloandoperatingcondition of each unit is displayed when set to system control operation. Thebutton is in red by Run button or the Stop button is in green when set to solo. First unit select button(1st set) This is operated to switch to the first unit select screen. Pump, Dryer operation screen buttonThis is operated to switch to the operation screen for Pump or to the opera-tion screen for Dryer. Pressure indicator Indicates the current pressure.] Auto(AT)/Solo status lampIndicates the Auto/Solo status of each unit. It is in red when set to Auto or inwhite when set to Solo.] Run/Stop status lampIndicatestheRun/Stopstatusofeachunit.Itisinredwhenrunningorinwhite when stopped.] Load(LD)/unload status lampIndicatestheLoad/Unloadstatusofeachunit.Itisinredwhenloadedorinwhite when unloaded.] Failure(Fail) status lampIndicates the Failure (Fail) status of each unit.The lamp is turned on (yellow) when the compressor fails.] Monitor switch button This is used to switch between monitors. (Pump, Dryer)] Date and time display Indicates the current date and time.] System control status display Indicates system control status; Running or Stop.]Initialstartunit(1st),nextstartunit(N-on),and next stop unit(N-off) status displayIndicates the numbers of initial start unit, next start unit, and next stop unit.] Weekly operation reserve status display Indicates "REZ" when the weekly operation is reserved.4. PREPRATION AND OPERATIOIN91 2 3 4 5 6 7 8 9 10 11 12 B1A 1 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 X 1 ( +) FG G C2 X 3 2b 1c NC C2 3b NC C3 4c NC C3 X 2 C1 ( - ) 24 V A i 1 X 4 2c NC 1a A i 2 3c 3a A o 1 NC 4a A o 2 C om m u n i ca ti o nC a bl e I N V F re qu e n cyS ta tu sO u tpu t L oa d/U n l o a dC o m ma n d S to pC o mm a n d S ta r t-u pC om m a n d ( P o we rP u l s e ) F a i l u r eI n pu t B12A 12 67891011121 123456789101112 2345 1a2a3a4a4cC1C1C2C2X 2C2( - ) 1c2c3c4bA o1A o2A i1A i2X1X 3( +)GND B1 B12 A 12 A1 R S 4 8 5 C i rcu i t RY1RY2RY3RY4 t Running Output (Flow Output) 4 20mA Pressure Output 4 20mA Failures Pressure Drop Remote Control (Flow Input) 4 20mA Pressure Sensor Input4 20mARemote Start Remote Stop Forced Start-up Master Unit TerminalSlave Unit Terminal To compressor StaterRun InputOutput (PID) Qualifiedpersonsarerequiredforelectricalinstallationwork.Theinstallationmustbeimplementedonlybyqualifiedpersons.Iftheinstallationisimplementedbyunqualifiedpersons, any mistakes cause electrical shock.Turn the power off to prevent electrical shock before opening the panel for electrical wiringorinspectionwork.Also,alwayscheckthatthechargelampoftheinverteristurnedoff,before performing any work on inverter compressor (V-type). Place "Caution plate," such as"Under inspection. Do not turn on." on the power supply side.Warning4.1 Notes for electrical installation work4.2 External interfaces with connection terminals ofthe MULTI ROLLERElectrical mattersCautions for combination with DSP-V typeInstall the electrical wiring equally for MULTI ROLLER and the compressor to let both of them be turned off at the time ofinstantaneous power failure.Cautions on wiring installation(1) If noise source is in the wiring area, or if the wiring distance to the compressor or the MULTI ROLLER is long, checkthe communication status of MULTI ROLLER to avoid malfunction.(2) Wiring and groundingInstall AC200V shielded wires and DC24V shielded wires into separate electrical systems.For communication connection, use communication twist pair cables.Eachequipmentshouldbegroundedintheearth.TheV-typecompressor,whichisthenoisesource,shouldbegrounded independently in the earth.(3) Power supply capacity[Power supply capacity] 100V 200V Master board's fuseFor 4 units 38VA 48VA 3AFor 8 units 44VA 61VA 3AFor 12 units 50VA 74VA 3AEssential requirementsOther connection signals of compressorAlwaysconnecttoafailuresignalandarunsignalofeachcompressortousethemforcheckofoperationstatusandforjump operations.Air tank capacityInstall an air tank that has three times as large capacity as the air tank being recommended for the compressor to be used(see the instruction manual of the compressor side), to prevent pressure fluctuation due to start/stop control and achievepower saving effects.Dryer operation and lead timeCancel the lead time setting for the dryer built in the compressor and perform solo operation using the instrument panel.The ganged operation of the dryer and the compressor may cause frequent stop of operation, resulting in dryer failure.104. PREPRATION AND OPERATIOINTwist pair cableSlave PCB (for the next unit) TM1-(+), (-) (up to the unit NO. n) (twist pair cable)Slave PCB (for the next unit) TM1-24V, G (up to the unit NO. n) (twist pair cable)TM1 1 2 31 2CN7 3TM2TM3 2 1SW1F1RS485 (-)RS485 (+)6145CN832AC100/200V IVPS3 1CN52 4 5 1 2 3CN228CN6614357FGDC24V OUTTouchPanelI/FDC5V OUTNFCSW1GND2(-)GND(-)RC SC FGTBAVR1(DC5V)012345678 9 A BCDEFSW3ON2143OFFz zzAC100V/200V10% 50/60Hz 121 34PL1a1c2a2c3a3c4a4b4cAo1Ao2C1C1Ai1C2Ai2C2X1X2X3C2CHDSW1RY4RY1RY3RY241OFF3SW32ON2b1c3a2cc2Ai11aAi2AO1C3Ao2C33c3b4c4a24VG X2X1X5X3FGC1C2 TM1RS485 (-)RS485 (+)GNDFG(-)(+)(+)(-)DCINIPIdetectionTouch panelcolor LCD monitorAC OUT (for AVR)Master PCB (MR-M) Current outputPressure output 1 (4-20mA)Sensor inputInput (dry contact)Pressure sensor input (4-20mA)Flow sensor input (4-20mA)Remote stop input (dry contact)External control input (dry contact)Communication in the slave units (Caution 1)RY2(Remote)RY3(Pressure drop)WhiteRedCommon for unit NO.2 to 12Slave PCB (MR-SR 2 to n)(Unit NO.2 to n)Answer input(Note 4)(Note 4)Start-up pulse commandoutput(Note 2)Stop pulse command outputCapacity control outputCompressor statusoutputINV frequency command output(Note 3)(Note 4)To Slave PCB of the next unitCommon for unit No. 2 to n Flow output 2 (4-20mA)Remote start input (dry contact)RY1(Running)RY4(Failures)External InputRemote stop Remote start Longer than 500msone-shot inputThis shows common wiring for unit No. 2 to n.This shows compressor side installation.FG S RA7G 24VA11+B12-RO SOFG 24VG224VG24VG24VB12-A11+A11+B12-Stop: dry a contact (2A)Compressor load/unload: dry c contact (2A)Compressor status output:dry c contact (2A)PID output: 4-20mA(When inverter unit is set)Pressure drop alarm: dry a contact (2A)Failures: dry c contact (1.5A)Remote control: dry a contact (2A)System control operation: dry a contact (2A)Start: dry a contact (2A)Compressor/PEAnswer outputCompressor/PEFailure outputFailure inputON (Compressor/PE Start up)ON (Compressor/PE stop)ON at loading (OFF at loading also can be set)ON for AUTO, run or, failure (Selected by setting)(ON is forced when both inverter and AUTO are selected)Y. RYAVRNFF ZCNFuseSW1 (MR-M)PLTMSymbolParts NameNoise FilterAuxiliary RelaySwitching PowerTerminal BlockVaristorConnectorPower SwitchSwitch for Setting Power LightSW (Others)SW3-4SymbolNameSettingConnecting device switchOFF (Compressor)ON (Peripheral Equipment)Setting switch (Note 3)1 2 3 45 6 7 89 A B CE FSWSWSWDCOMP./PE Unit NO.COMP./PE Unit NO.COMP./PE Unit NO.Unit NO.1Unit NO.2Unit NO.3Unit NO.4Unit NO.5Unit NO.6Unit NO.7Unit NO.8Unit NO.9Unit NO.10Unit NO.11Unit NO.12Unit NO.14Unit NO.15Unit NO.13Unit NO. setting of slave PCB (Note 4)RY1RY2RY4RY3SymbolNameOperationStart-up pulse command outputStop pulse command outputCapacity control outputCompressor status outputRelay output (Note 2) NameRY1RY2RY4RY3Relay output (Note 1)SymbolOperationSystem operation outputRemote control outputPressure dropFailure outputSystem operation ONRemote control ONPressure drop alarm ONAlarm/Failure ON0123456789AB C DEFCaution1. The wiring shown in the dotted line, the equipments installed in the compressor side and the wirings are either option or not supplied.2. The rated valve of dry contact is max. AC250V1A.3. The signal input of remote start, stop and external input is DC24V. Each shall be connected by one-shot, which is longer than 500ms.The unit quantity number in control is shown as n in the figure.The last digit number of the MULTI ROLLER EX model description stands for the unit quantity number in control. (e. g. MR26-4: n=4)AVR2(DC24V)RY4RY1RY3RY22b1c3a2cc2Ai11aAi2AO1C3Ao2C33c3b4c4a24VG X2X1X5X3FGC1C2 TM1RS485 (-)RS485 (+)GNDFG(-)(+)(Unit NO.1)Answer inputStart-up pulse commandoutput(Note 2)Stop pulse command outputCapacity control outputCompressor statusoutputINV frequency command outputG24VG24VB12-A11+A11+B12-Failure inputSlave PCB (MR-SC1)4.3 Wiring diagram114.4 Preparation and operationSetting on the compressor sideBefore running the compressor with theLocalsetting, always change the Remote setting and also change the capacitycontrol setting to the compressor side.(Factors for continued unload status and activation of safety valve)Beforeactivatingsolooperationofeachcompressorforinspectionetc,setSoloforthecompressorontheMULTIROLLER side instead of setting toLocalon the compressor side. [Constant speed units] Connect the load/unload output to the external load/unload of compressor. Oil-cooledtype:Setthecapacitycontrolsettingswitchofcompressorto[externalcapacity control].Oilless type: Set the operation control of compressor to [Unit quantity].[Inverter units]uses both the rotation speed control and the unloader control for load/unload outputChange the inverter setting. PQ is not used. Connect the PID output to the inverter of compressor.Oil-cooled type: Do not set the capacity control setting switch of compressor to [external capacity control].Directly connect the load/unload output to the blowoff solenoid valve circuit.Oil-freetype:Settheoperationcontrolsettingofcompressorsidetoexternal capacity control and [Unit quantity].Connect the load/unload output to the external load/unload input.[Common]Onautomaticstart/stopunits,changethemodetotheonethatdoesnotautomatically start/stop the capacity control (Auto operation).Setting on the MULTI ROLLER sideSTEP 1: Check battery switch and touch panel switchTurnonthebatteryconnectionswitch(the6th#ofSW3)onthemaster board (A)TurnontheDIPSWsetting(the5th#ofSW1)onthetouchpanel(B)STEP 2: Check/Reset current time and date[Main menu][System AD] [Time Setting](Note)Thebatteryisrechargeable.However,checkthedateandtimeiftheMULTIROLLERisstoredforalongperiod of time without being energized.STEP 3: Set compressor requirements from [Maintenance menu] [Control Requirement] Assigning compressors and setting operation layout(Note) Always press the [OK] button after setting.[Layout] [Select Loop: Assign Compressors][Loop 1: Select Operation Layout, Assign Start/Stop] [Loop 2: Output PID, Assign Start/Stop]Setting peripheral devices (Note) The auxiliary units are not shown if setting on the slave side is not set to Auxiliary.[Peripheral Device] [Number of auxiliary units, lead time]Setting IPI Auto (restart after power failure) [On], [Off]Setting capacity control [YCO], [TON] [Load/Unload condition]Setting compressor status output (DO-Status) [REN], [RUN] [ALM](Note) The function is enabled only for Loop 1 and is collectively set.Setting the number of compressor units (Comp. Unit)(Note) Check if the number of units conforms to the specification.STEP 4: Set compressor requirement timers.[Maintenance menu] [Parameter setting] Setting Initial Pump up and Forced Start-up [Parameter setting 1][Initial Pump up: 1st, 1sd] [Forced start-up: EFT, EFD]](Note) Forced Start-up: One-shot signal, EFT: Waiting time until unloadedSetting compressor limit timers [Parameter setting 2][StopLimitTimer:MT] [StartLimitTimer:ST] [UnloadStopTimer:UST] [OperationAnswerTimer (AN)]Setting INV and PID [Parameter setting 4], [Setting MLV](Note) This setting needs to be made only for DSP-type single stage units.Setting MID (minimum number of units in operation) [Parameter setting 6], [MID: 1 unit](Note) This setting needs to be made when a minimum of 1 unit is to be operated.4. PREPRATION AND OPERATIOINAB12OperationSTEP 1: Operation setting [Main menu] [Operation]Setting each compressor [Solo] or [Auto] [Run] or [Stop](Note)Whenthecompressorsaresettosolooperation,theyrunorstopregardlessofsystemcontrol.To enable system control operation, set to [Auto] and [Stop].[Auto] cannot be set unless the compressorssurely recover from the failure.Setting initial start unit [Loop 1 1st operation set] [Loop 2 1st operation set](Note) If start/stop order is changed in the loop setting, the initial start unit must be reset.Setting each auxiliary [Solo] or [Auto] [Run] or [Stop](Note) The auxiliary setting needs to be made on the slave side.STEP 2: MULTI ROLLER Stop/Run operation [Remote]: [Off] or [On] [System]: [On] or [Off]When [Remote: On] is selected: The operation starts by entering [Remote start: ON ( acontact)] to themasterboardterminalblock(TM2).Theoperationstopsbyentering[Remotestop:ON( acontact)]. A one-shot 500ms signal is used for both of them.When[Remote:Off]isselected:Theoperationstartsbypressingthe[System:On]buttonontheoperation panel. The operation stops by pressing the [System: Off] button on each screen.4.5 Main menu and setting screensNormal operation 14. PREPRATION AND OPERATIOINTitle screenLoop1 1st operation set Loop2 1st operation setOperation procedure of pumps and dryers-Unit is switchedtoStart . OK?YES NO5SMENUComp. MonitorComp. OperationControl is switched toRemote. OK?YES NO13Normal operation 2Normal operation 34. PREPRATION AND OPERATIOINPressure Setting 1 Pressure Setting 2Timer setting Weekly Time Setting: Press.2[Confirm setting validity][Set differential pressure][Wait for effects][Start/Stop time]Enablepressuresetting. OK?YESNOSystem Adjustment Time SettingShutdown HistoryCalibrationSelect a Day of the week screenSTEP1Stop buzzer = Stop alarmSTEP2Reset failure indication on compressorsSTEP3Reset = Recover from failure Setthecurrentdata,thedayoftheweek,andtimeusingcorresponding buttons.(Althoughthetimewassetbeforeshipping,checkitagainsince it may affect the Shutdown History or weekly operationif it is set to incorrect time.)Bypressingthecorrespondingbuttons,keypadscreenisdisplayedtoenterrequirednumbers.Forselectingthedayof the week, Select a Day of the week is displayed. Enter thedayandpressOKbutton.(Enterthelast2digitsfortheyear.) Bypressingbutton,itisreturnedtotheSystemADJscreen. Calibration (adjustment of screen detecting position) is usedtoadjustthescreenpositionwhengoodresponseofthescreen can not be obtained due to the shifted positions to bedetected after the long term use. Press Calibration button.AfteritischangedtotheCalibrationscreen,pressmarkssequentiallydisplayedonthescreen.Usethetouchpanelpen accompanied for adjustment.Adjustthecontrast(brightnessofthescreen)usingor button. Bypressingbutton,itisreturnedtotheSystemADJscreen.144. PREPRATION AND OPERATIOINDTime SettingETouch Panel Adjustment screenCalibrationCalibration screenw Pressure settingqSystem AdjustmentDPressure Setting 1IMPORTANT Twostagesofpressurecanbeauto-matically switched by the weekly timer. Forpressureadjustmentofthesystemcontrol,pressPressurebuttontosetthepressurevaluetoadjustthecapacity. It has two settings, Pressure setting 1 and Pressuresetting2,whichcanbeselectedaccordingtotheirapplications.ToshowthePressuresetting2screen,pressNext.Toreturn, press Back.To switch the pressure setting, select it by pressing USE orNo.(Forpressuresetvalues,considerthecontroltype,controlmethod,pressureloss,andpressurespecification.Set each pressure as described below.) To set the SET, enter the target pressure to control. ForvaluesofHH,H,L,LL,andLLL,enterthedeviationsfrom the value of SET.WhenthepressureisatLorlower,acompressorisloaded(started when no compressor is unloaded) or when the pressureisatHorhigher,acompressorisunloaded(stoppedwhennocompressor is loaded).The set values of LL and HH function as same as the L and H.WhenthepressureisatLLLorlower,pressurelowalarmisgenerated.Set values should be in the ranges below.0HHH1-SET Sample:00.020.040.35(1-0.65)0LLLLLLSET Sample:00.030.050.080.650.690MPa0.670MPa0.650MPa0.620MPa0.600MPa0.570MPaH= 0.020MPaL= 0.030MPaLL= 0.050MPaLLL= 0.080MPaSET= 0.650MPaHH= 0.040MPaSample Operation of Keypad to change setting valuesIMPORTANT Whennoswitchoperationisperformedfor10min.,thescreenbacklight is turned off to protect the screen. To turn it on again,touch the screen by your finger. Even if the position you touchedis at any switch, the corresponding operation is not performed. When a faiIure or an alarm occurs during operation, the screen isautomatically switched to the Shutdown History screen. The dateandtimeofoccurrence,compressorunitNo.,description,andstatusaredisplayedattheuppermostrowandthebuzzerandfailureoutputareturnedon.Tostopthebuzzer,pressStopalarm button. Shutdown History contains up to 50 items.TorecoverfromthefaiIure,pressResetafterdeterminingandresetting the cause on the compressor side.(Sample: Pressure setting 1) By pressing HH1 the keypad screen is displayed. After deleting current set value byBS: Backspace or CL: Clear button, enter the set value and press OK button. Finally press USE button.Select HH1 BSCL Keypad display154. PREPRATION AND OPERATIOIN Alwayssetthetimersbeforeoperation.Fortimers,setthe effect waiting time of the equipment according to thepressuresetvaluesandtheeffectwaitingtimeforthecompressors. (a)HH: 0-999 sec. (Initial value 5 sec.)H: 0-999 sec. (Initial value 45 sec.)L: 0-999 sec. (Initial value 45 sec.)LL: 0-999 sec. (Initial value 45 sec.)Load: 0-999 sec. (Initial value 5 sec.)Unload: 0-999 sec. (Initial value 5 sec.)Forced switching: 0-99 hours (Initial value 24 hours.)Bypressing"Weeklytimer"button,"WeeklyTimeSett-ing: Control" screen is shown. Weekly timers can be setfor pressure settings 1 and 2 for start time and stop timeof the scheduled operation on the days of the week. (b)Toshowthe"WeeklyTimeSetting:Press.2"screen,press "Next" button.Forthetimesettingoneachdayoftheweek,"Weeklyreserve:REZ"isshownintheoperationmonitorscreenwhichsetstheothersettingsthan0:00-24:00,andautomatic operation of the system control is started.Whenthetimeissetwithintherange00:00-24:00,therunandstopstatusofthepreviousdayiscontinuedtorun or stop the operation.Sample:Settingtooperatethesystemfrom8:30onMondayto18:00 on Wednesday:MO 8:30-24:00 TU 0:00-24:00 WE 0:00-18:00(However,thesettingsonSunday,Thursday,Friday,and Saturday are 0:00-24:00.) IntheWeeklyTimeSetting:Control,bypressing"1stSet"buttontoshowthe"WeeklySetting:1stUnit"screen, the initial start unit can be specified by the day ofthe week with loop. (c)Timer settingDTimer setting 1EWeekly timer system control time settingF GED InWeeklySetting:1stunit,settheunitwhichisinitiallyactivated(1stunit)whenthesystemcontrolisstartedoneachdayoftheweek.Thissettingisthefunctionforaveraging the operating time of compressors.Loop 1 is the dedicated for the group of constant speed unitsand Loop 2 is the dedicated for the group of inverter units (Vtype).Set the 1st unit for each loop by pressing Day of the weekbutton.WhentheturnbackisselectedinLoop1,selectionof1stunit is disabled. To return to Weekly Time Setting: Control screen, press button. Comp. Operation Panel screen (1) Discharge pressure is displayed at the upper left corner of thescreen.(2)ItemsfromC1toC12(max.)aretheoperationsettingsbycompressor unit number.Operationselectionsofthenumberofcompressorsconnected are displayed on the screen.SoloandAutobuttonsswitchesbetweenindividualoperation and automatic operation.WhenSoloisselected,theunitcanbeindividuallystartedorstoppedbyStop/Runbuttonsregardlesstothesystemcontrol.(3) Remote, is buttons to operate the panel.Select Off to operate from the panel or On to operate fromany external equipment(Remote).WhenRemote:offisselected,thesystemcontrolcanbestarted or stopped by Off/On buttons on this screen. 1st Set is to select the 1st unit from the unit numbers set ineach group. Press the button to select or change the 1st unit.Loop1 1st operation set screen is displayed.164. PREPRATION AND OPERATIOINIMPORTANT SettingsgotLoop1andLoop2andselectionofturnbackoperation are set from the Maintenance menu screen. WhenthescreenisswitchedtotheMaintenancemenuscreen,selectthe Requirementbutton.IntheControlRequirementpressLayoutbuttontosetoperationassignmentandoperationlayoutsofLoop1andLoop2.Refer to the page for Maintenance menu for detail.IMPORTANT System control On button on the screen is disabledwhenRemote:Onisselected.However,Offbutton is enabled regardless to the operating site.FWeekly Setting: 1st unitWeekly Time Setting: Press.2 is the function to switch tothePressuresetting2automatically.SetthestarttimeandstoptimeforeachdayoftheweekwhenthePressure setting 2 is used.Compressor operation procedureOperationPumpbuttonistodisplaythescreenforpumpoperation. Dry button is to display the screen for dryer operation.Operation procedure of pumps and dryersPump Operation screenIMPORTANT Pumpordryerunitsneedtobesetinadvance.Setthenumberofunitsand1stSetinthePeripheralDevice screen of Control Requirement screen, referringto the pages of Maintenance Menu operation.IMPORTANT PumporDryerOperationscreenisnotdisplayedwhen no pump or dryer unit is connected. Auto settingis the operation in conjunction with the operation fromthesystemcontrolpanel.Nosystemcontrolisperformed. Operation screen(1) Discharge pressure is displayed at the upper left corner of thescreen.(2)P1-P2(max.)areoperationsettingperpumpunitandD1-D12(max.) are operation setting per dryer unit.Operationselectionsofthenumberofauxiliaryunitsconnected are displayed on the screen.SoloandAutobuttonsswitchesbetweenindividualoperation and automatic operation.When Solo is selected, the unit can be individually started orstopped by Stop/Run buttons. When Auto is selected, unitsarestartedorstoppedinconjunctionwiththeoperationfromthe system control panel.(3)BypressingsystemOffbuttonduringthesystemcontrol,operationconfirmationscreenisdisplayed.PressYEStostop the system control.ToreturntotheComp.OperationPanelscreen,pressbutton.Tosetorchangethe1stunitofcompressors,press1stSet button on the Comp. Operation Panel screen. System control Loop 1 is for selection of 1st unit from theconstant speed units.Unitsmarkedinyellowinthesquareareassignedcompressors. Set the 1st unit by pressing one of buttonsof unit numbers marked in yellow. System control Loop 2 is for selection of 1st unit from theinverter units (for V type).Unitsmarkedinyellowinthesquareareassignedcompressors. Set the 1st unit by pressing one of buttonsof unit numbers marked in yellow.174. PREPRATION AND OPERATIOINIMPORTANT Compressorstobeusedneedtobeassignedinadvance.AssignthecompressornumbersfromtheOperationLayoutofControlRequirementscreenbyloop,referringtothepagesofMaintenanceMenuoperation.No1stunitissetatshipment.Forsystemcontrolofconstant speed units, always set the 1st unit ofSystem control Loop 1.IMPORTANT No1stunitissetatshipment.Forsystemcontrol of the inverter units (for V type), alwaysset the 1st unit of System control Loop 2. Comp.Monitorscreenisthemonitortodisplaythesystemcontrolstatusandoperationstatusofcompre-ssors.Buttonsrelatedtothisscreenareoperationmonitor of Pump or Dryer units.(1) Dischargepressure is displayed at the upper left corner of thescreen.(2)UpperpartofthescreendisplaysthesystemcontrolstatusRunning,weeklytimerstatus(REZ(Reserved)),1stunitamongcompressors(theunitinitiallystartedwhenstartingthesystemcontrol),nextstartunit(theunitstartednext,N-on), and next stop unit (the unit stopped next, N-off).Weeklyreserve:REZisdisplayedwhensettoperformthesystem control with weekly timer.(3) C1-C12 (max.) are operation status display of compressors.Operationstatusofthenumberofcompressors(Auto:AT,Run,Load:LD,andFail)connectedaredisplayedonthescreen.(4)Flowrateisdisplayedatthelowerleftcornerofthescreenwhentheoptionalflowsensorisconnected.Consultthesupplier for connection and setting of the flow sensor. BypressingsystemOffbuttonduringthesystemcontrol,operationconfirmationscreenisdisplayed.Press YES to stop the system control. Pumpbuttonistodisplaythescreenforpumpoperation monitor. Dry button is to display the screen for dryer operationmonitor.IMPORTANT Flowvolumeisnotdisplayedwhennoflowsensor is connected.DSelection of 1st unitLoop2 1st operation setLoop1 1st operation setComp. Monitorqrwet Operation monitor184. PREPRATION AND OPERATIOIN4.6 Maintenance menu and setting screensMain menu operation 1Main menu operation 2Pressure= Push 5sMaintenance[Parameter:1-6][ControlRequirement](user)Operation Layout Loop1,2Capacity Control SetPeripheral Device[Relay]194. PREPRATION AND OPERATIOINParameter setting 1. Parameter setting 2. Parameter setting 3.4 Parameter setting screen Parameter setting 1. Initial Pump up, Change isthescreentoperformsettingsofinitialPumpupandforcedStart-up.(RPTandOSKarenotused.:Initialvalue 0.)InitialPumpupfunctionistoavoidunproductiveoperationbylimitingthenumberofcompressorsinoperationandtheiroperation time. Also, in this time period, pressure low alarm isnot generated. When the pressure becomes at L or higher, it isreturned to the normal control.1ST: Initial Pump up timer (Initial value: 3 min.)1SD: The number of initial Pump up units (Initial value: 1 unit) ForcedStart-upistostartthenextstartunitunloadedevenwhen the pressure is at L or higher, by turning ON the forcedStart-upinput,preparingforloweredpressure.Itisenabledafter the initial Pump up is completed.EFT: Forced Start-up timer (Initial value: 0 min.)EFD: The number of unit to be forced-Start-up(Initial value: 1 unit)Parameter setting 2. Pressure Control Timer isoperation limit timers for compressors.Timer used for forced switchingParalleloperationtimeristostopthenextstartunitafterstarting the unit due to forced switching, etc.PRT: Parallel operation timer value(Initial value: 15 sec.)Timers used for operating conditions of compressorsUnloadstoptimeristostopunloadingwhentheunloadingofthenextstopunitiscontinuedinothercasesthanthatthepressure is dropping at pressure H or lower. Run answer timerisfordetectionofoperationfaultofcompressorsandPump,Dryer units.MT: Stop limit timer(Initial value: 20 min.)ST: Start limit timer(Initial value: 1 min.)UST: Unload stop timer(Initial value: 3 min.)AN: Operation answer timer(Initial value: 15 sec.)Parametersetting3.PressureSensorADJis to adjust the pressure sensor. Parametersetting4.PIDControlADJistosetPIDvalues. As they have been set to their initialvaluesatshipment,nosettingisrequired.NotethatMLVmayberequiredtobesetdepending on the model.Changing the number of units to be displayed The unit quantity less than 3 cannot be set.6 unitsExample: DisplayonlythenumbersofunitsconnectedtotheMULTIROLLERcapableofcontrolling12 units maximum.204. PREPRATION AND OPERATIOIN Control Requirement screen Parameter setting 5.6Operation Layout (Select Loop) and Loop 1 (constant speed units) settingDSP-22VI :"44" (%)DSP-37V-7k/DSP-37VI :"32" (%)DSP-55V-7k/DSP-55VI :"32" (%)Other than above :"0" (%)MLVsetting(ForMLV=PIDminimumoutputs,enterthePIDminimumoutputs(%)whenDSPcompressorsareloaded.)IncaseofNEWDSPVtype(singlestageunit),surelyselect one of the following models and enter it to the MLVsetting of the Parameter setting 4. Parameter setting 5 is the adjustment screen of the flowsensoroptionallyconnected.Parametersetting6istheairflowsettingscreenforoptimumcontrol,butnotnormallyused.However,theminimumnumberofunits(MID)inoperationisrequiredforthesystemcontrol.Surely set it. AsControlRequirementisrequiredforthesystemcontrol,surelysetit.Layoutbuttonisthesettingtogroupthecompressors(loop).Devicebuttonistosetthenumberofconnectedperipheraldevicesandleadtime.Besidethem,thereareRecoveryfrompowerfailure(IPIAuto),DO-Statusstatussetting,compressorconnectionsetting,etc.ByYCOandTON,detailsettingofcapacitycontroloutputstatuscan be performed.When IPI Auto is set to On compressors are automati-callystartedwhenrecoveredfrompowerfailure.WhensettoOffcompressorsstaystoppedwhenrecoveredfrompowerfailure.Fordetailoninstantaneouspowerfailure,etc.refertothesectiononinstantaneouspowerfailure and power failure control functions. (Initial value:None)DO-Status sets the status output of slave units (RY4).REN:Auto,RUN:Run,orALM:Alarmoutputcanbeselected.However,theunitssettotheLoop2aresettoREN.(Initial value: REN)The number of compressors has been set to the numbermatched to the specifications at shipment. BypressingLayoutbutton,OperationLayout(SelectLoop) screen is displayed. Assign compressors by loop.Select Circle () of Lp1 for constant speed units.Select Circle () of Lp2 for inverter units.Surely press OK button after setting. BypressingNextbutton,Loop1Layout(constantspeed units) screen is displayed.21 Loop 1 screen selects the layout of the system control ofthe constant speed compressors (Rotary control or TurnBackcontrol)andtheoperatingorderofthecompressors.For setting the operating order of each unit, by press-ing any unit number button, the square of that unit ismarkedinred.Changetheorderoftheunitbypressing Left arrow or Right arrow button. Always press OK button after setting.PressBackbuttontoreturntotheSelectLoopscreen.Press Next to the Loop 2 screen. Loop 2 screen selects the layout of the system control ofthe inverter compressors (PID output) and the operatingorder of the compressors.For setting the operating order of each unit, by press-ing any unit number button, the square of that unit ismarkedinred.Changetheorderoftheunitbypressing Left arrow or Right arrow button.Always press OK button after setting.Press Back button to return to the Loop 1 (constantspeed units) screen.Press to the Control Requirement screen. By pressing Device button, Peripheral Device (dryersandpumps)settingscreenisshown.Setthenumberofauxiliaryunitsandleadtime(operationtimebeforethesystemcontrol)beforethesystemcontrol.Also,slaveunit setting needs to be changed.DryersNumber of units: Max. 12 units (Initial value: 0 unit)Lead time setting: Waiting time (Initial value: 180 sec.)PumpsNumber of units: Max. 2 units (Initial value: 0 unit)Lead time setting: Waiting time (Initial value: 10 sec.)By pressing button to return to Control Require-ment screen. By pressing YCO button, the capacity control output tothe compressors can be set to energized when unloaded(ON) or to Energized when loaded (ON).However,itisNotEnergized(OFF)forbothstatuswhen stopped.Thecapacitycontroloutputcanbesetforeachunit.(Initial value: Loaded)By pressing button to return to Control Require-ment screen.4. PREPRATION AND OPERATIOINLoop 2 (INV units) Layout Peripheral Device setting Capacity Control selection Loop 1 (constant speed units) Layout 224. PREPRATION AND OPERATIOIN BypressingTONbutton,capacitycontrolselectionscreen for solo operation is shown. Whenthecompressorsaresettosolooperation,capacity control outputs can be set as follows.(1) Load: Always loaded.(2) Unload: Always unloaded.(3) Auto: Unloaded at H or higher or loaded at L orlower. (Initial value: Auto)H: (H0.0MPa) (Initial value: 0.56MPa) Bypressing button,itisreturnedtoControlRequirement screen. Clear History is used to clear the history of all failures. BypressingClearHistorybutton,operationcon-firmationscreenisdisplayed.PressYestoclearthehistory of failures.Defaultisusedtoreturnallsettingstotheirinitialvalues.BypressingDefaultbutton,operationconfirmationscreenisdisplayed.PressYestoreturn all settings to their initial values. Never operatethis button in normal condition. Com.StatusandTestbuttonsarethefunctionsforservice and inspection. They do not need to be operatedin normal condition. Com.Statusbuttondisplayscommunicationstatusbetweenboardsonthescreen.BykeepingpressingClearbuttononthescreen,allerrorcountsaresettozero.Eacherrorcountercountsthenumberoffaultsoncommunication.Whenthenumberoffaultswithinaunitoftimeisextremelyhigh,ascommuni-cationerroroccursresultinginuncontrollablecondition, consult the supplier.To return to the Maintenance menu screen, press button. "Test"buttonistochecktheoperationofauxiliaryrelays installed on the boards. BypressingM(Master)orC(Compressornumber)buttonontheTest1screen,RelayOutputTest screen for each unit is displayed. If the slave unitforwhichunitnumberbuttonispressedisnotconnected,NotConnectederrorscreenisdisplayed.BypressingConfirmbutton.Itisreturnedtotheprevious screen (Test 1 or Test 2 screen).By pressing Next, Test 2 (dryers and pumps) screenis displayed.Bypressingbutton,itisreturnedtotheMaintenance Menu screen. OntheRelayOutputTestscreen,bypressingeachrelaybutton,theoperationofrelaysinstalledontheboards can be checked.To return to the Test screen, press button.Communication status and test Test screen Communication Status screen History clear and default setting Sample of operation confirmation screen. HSolo Capacity Control Set 5.1 Basic functions and operations(1)Loop setting and start/stop order(2)Operation driven by inverter Two units or one unit can be selected as PID output unit.PIDoutputunitisPID-controlledbasedonthedeviationbetweenthetargetpressureandthepressuresensorreadout within the range between H and L.Speed command signal is output from the MULTI ROLLER to the inverter. To the PID output unit, maximum speed is output when loaded at H or higher , or minimum speed is output whenL or lower or when unloaded. When two units are selected as PID output units, the same signals are output to the inverters.Maximum speed output unit is loaded or unloaded at the maximum speed. When MLV setting >0, the compressor is considered as a DSP compressor and it is PID-controlled between MLVand 100% when loaded.Theoutputissetto0%afterswitchingtounloadanditisswitchedtoloadaftertheoutputissettoMLVwhenunloaded.(3) Operation upon instantaneous power failure and power failure Two units or one unit can be selected as PID output unit.PIDoutputunitisPID-controlledbasedonthedeviationbetweenthetargetpressureandthepressuresensorreadout within the range between H and L.Speed command signal is output from the MULTI ROLLER to the inverter.5. DESCRIPTION OF CONTROL OPERATION231.Selection of loop and settingof start/stop order(1) Each compressor can be set to Loop 1 (constant speed unit) and Loop 2 (Inverter unit).(2) For Loop 1, rotary operation (stopped in the order of started units) or turn back operation (stopped in the reversed order ofstarted units) can be selected.(3)ForLoop2,PIDoutputto1unitor2unitscanbeselected.(Theotherunitsareoperatedinfullspeed.)However,itiseffective only for rotary operation.2.Starting order with inverterunits mixed(1) When Loop 1 and Loop 2 are used together, the inverter units of Loop 2 have the priority to start.The unit firstly started among the inverter units is the unit to which PID output is sent.Each time an inverter unit is newly started, PID output is sequentially switched to the newly started unit.Whenthereare2ormoreinverterunitsand1ormoreconstantspeedunit,theconstantspeedunitsaresequentiallystartedafterthePIDunitisstarted.Afteralltheconstantspeedunitsarestarted,theotherinverterunitsarestarted.However, when constant speed units can not be started depending on the condition, inverter units are started.Sample 1: Setting for one PID unit Sample 2: Setting for one constant speed unit and two inverter units3. Stopping order (1) When Loop 1 and Loop 2 are used together, the inverter unit which is not PID unit is stopped first. Then, constant speedunits are stopped.(2) When Loop 1 is used, the units are sequentially stopped in the order by which they are started when Rotary is selected.When Turn Back is selected, the units are sequentially stopped in the reversed order by which they are started.(3) When Loop 2 is used, the inverter units are sequentially stopped in the order by which they are started (rotary operation).4. Loading order (1) When Loop 1 and Loop 2 are used together, the units are sequentially loaded in the order of inverter PID units, constantspeed units, and to inverter full speed units.(2) When Loop 1 is used, the units are sequentially loaded in the reversed order by which they are started when Rotary is selected.When Turn Back is selected, the units are sequentially loaded in the order by which they are started.(3)WhenLoop2isused,theinverterunitsaresequentiallyloadedinthereversedorderbywhichtheyarestarted(rotaryoperation).5. Unloading order (1) When Loop 1 and Loop 2 are used together, the units are sequentially unloaded in the order of inverter full speed units,constant speed units, and to inverter PID units.(2) When Loop 1 is used, the units are sequentially unloaded in the order by which they are started when Rotary is selected.When Turn Back is selected, the units are sequentially unloaded in the reversed order by which they are started.(3) When Loop 2 is used, the inverter units are sequentially unloaded in the order by which they are started.6. 1st start unit The 1st start unit is the unit to be firstly started when the operation with the MULTI ROLLER is started. It is selected from theunits to which Auto(AT) operation is set.(1) When Loop 1 and Loop 2 are used together, the inverter units have the priority to be the 1st unit. It can be selected fromthe all units.(2) When Loop 1 is used, it can be selected from the all units when Rotary is selected.When Turn Back is selected, it can not be selected. It is automatically selected in starting order set.7. Next start unit The next start unit is the unit to be started next. It is automatically searched from the stopped units to which Auto operation isset.(TheautomaticsearchisperformedeachtimewhenSoloorAutoswitchingofeachcompressororchangeofoperationisperformed.)(1) When Loop 1 and Loop 2 are used together, a unit becomes the next start unit in the order of inverter PID units, constantspeed units, and to inverter full speed units.However, the next start unit is switched to Solo, it is selected from the other units.8. Next stop unit The next stop unit is the unit to be stopped next. It is automatically searched from the running units to which Auto operation isset.(TheautomaticsearchisperformedeachtimewhenSoloorAutoswitchingofeachcompressororchangeofoperationisperformed.)(1)WhenLoop1andLoop2areusedtogether,aunitbecomesthenextstartunitintheorderofinverterfullspeedunits,constant speed units, and to inverter PID units.Switching condition of the next stop unit: When the next stop unit is switched to Solo, when the next stop unit fails, whenstop limit timer, unload stop timer, or forced switch timer is timed, or when the next stop unit is stopped due to H or HHcondition.Unit 1 RunRunRunStopUnit 2 Stop Run Run RunUnit 3 Stop Stop Run RunPID Unit 1 Unit 1 Unit 2 Unit 3 Unit 3Unit 1 RunRunRunStopUnit 2 Stop Stop Run RunUnit 3 Stop Run Run RunPID Unit 1,2 Unit 1 Unit 1 Unit 2 Unit 2245. Description of control operationTarget pressureTimePressureSet SetMI NMA XUnloadLoadUnloadLoadUnloadLoadTimeFirst unloaded unit is loaded.When no unloaded unit presents, one unit is immediately started to load.First loaded unit is unloaded.Second unloaded unit is loaded.When no unloaded unit presents, one unit is immediately started to load.Initial air Pump up operationMULTI ROLLER operation startFirst load- ed unit is unloaded.Second loaded unit is unloaded.Third unloaded unit is loaded.When no unloaded unit presents, one unit is immediately started to load.Pressure SetINV unit speedcommandNext unload unitINV unit Next subsequent/unload unit5.2 Detail of pressure setting5.3 Pressure control flow(1)Control flow of constant speed unit (2)Control flow of inverter unitSET+HH SET+H SET-L SET-LL SET-LLL Target pressure (SET) (Two types of value can be set to the pressure values at from HH to LLL and they can be used to control by switching.) Pressure (P) HH or higher continuedUnloaded unit is stopped each time end of HH timer. Unloaded unit is added eachtime end of unload timer. HH or higherSame operation as H or higher. H or higher continuedUnloaded unit is stopped each time end of H timer. Unloaded unit is added eachtime end of unload timer when the pressure is increasing (stopped when the nextstop unit is unloaded). H or higherOne unit is immediately unloaded. Stable between H and LThe next stop unit is stopped after time end of unload stop timer. Pressure decreasingWhen no unloaded unit presents and reaching time to L is shorter than the settingtime of pressure recovery timer, the next start unit is started. With inverter unit: In case of PID unit, speed command is PID-controlled whenloaded or speed command is minimum speed when unloaded. L or higherInitial air filling is reset. L or lowerOne unit is immediately loaded. When no unloaded unit presents, the next start unitis started. When PID unit is unloaded, the PID unit is immediately loaded to maximum speed. L or lower continuedWhen no unloaded unit presents, one unit is started after time end of L timer. Pressure decreasingLoaded unit is added after time end of load timer. With inverter unit: Speed command is maximum speed. LL or lowerSame operation as L or lower LL or lower continuedWhen no unloaded unit presents, one unit is started after time end of LL timer.Loaded unit is added after time end of load timer. LLL or lowerAfter 1 second, Pressure Low alarm is generated (not generated during initial airfilling). 255. Description of control operation5.4 Detail of pressure setting and timer settingItem name Setting range Initial value Description Time stop conditionPressuresettingPressure HHSET+HH1.000H