SERVICE MANUALSPLIT-TYPE, HEAT PUMP AIR CONDITIONERSSPLIT-TYPE, AIR CONDITIONERSCONTENTS1. REFERENCE MANUAL··································22. SAFET
105-3. NOISE CRITERION CURVES5ft3.3ftMICROPHONEUNITGROUND90807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARING FORCONTINU
100Request codeRequest contentDescription(Display range)Unit Remarks153154155156157158159160161162163164165166167~189190191192~7647657667670 – 99990 –
101Frequency control state 2DisplayDischarge temperatureCondensation temperatureAnti-freezeHeatsink temperatureoverheat preventionoverheat preventionp
102[Fan control state] (Request code :"53")Data displayFan step correction value by heatsink temperature overheat prevention controlFan step
103[Contact demand capacity] (Request code "61")Data display000Setting content[External input state] (Request code "62")Data displ
104SW1, SW2, SW6, SW7123456000000 0000100000 0001010000 0002110000 0003001000 0004101000 0005011000 0006111000 0007000100 0008100100 0009010100 000A11
105[Indoor unit – Model setting information] (Request code : 162)Data display00See the table on the right.Display Model setting state Display Model s
10614 DISASSEMBLY PROCEDUREOPERATING PROCEDUREPHOTOSPUZ-A18NHA2 PUZ-A18NHA2-BS1. Removing the top panel, service panel, front panel and back panel(1)
107Electrical parts boxController circuitboard (C.B.)Electrical parts box fixingscrewTerminal block(TB1)OPERATING PROCEDURE PHOTOS4. Removing the ther
108OPERATING PROCEDURE PHOTOS5. Removing the thermistor <Outdoor> (TH7)(1) Remove the service panel. (See photo 1.)(2) Remove the top panel. (Se
1099. Removing linear expansion valve(1) Remove the service panel. (See photo 1.)(2) Remove the top panel. (See photo 1.)(3) Remove the front panel. (
115-4. STANDARD OPERATION DATA5-4-1. Heat pumpRepresentative matchingPKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BAModeCOOLING HEATING COOLING HEAT
110OPERATING PROCEDURE PHOTOSPhoto 13Photo 14Compressor(MC)Valve bedSeparatorSeparatorfixing screwCompressorfixing nutAccumulatorAccumulatorOutletInle
111OPERATING PROCEDUREPHOTOS & ILLUSTRATIONPUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BS1. Removing the service panel and top panel(1) Remove 3 service
112OPERATING PROCEDURE PHOTOS4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)(1) Remove the service panel. (See figure 1.)(2) Remove the
113OPERATING PROCEDUREPHOTOS7. Removing the 4-way valve coil (21S4),linear expansion valve coil (LEV-A) and bypass valve coil (SV)(1) Remove the servi
114OPERATING PROCEDUREPHOTOS10. Removing the bypass valve(1) Remove the service panel. (See figure 1.)(2) Remove the top panel. (See figure 1.)(3) Rem
115OPERATING PROCEDUREPHOTOS14. Removing the compressor (MC)(1) Remove the service panel. (See figure 1.)(2) Remove the top panel. (See figure 1.)(3)
116OPERATING PROCEDUREPHOTOS & ILLUSTRATIONPUZ-A42NHA2 PUZ-A42NHA2-BS1. Removing the service panel and top panel(1) Remove 3 service panel fixing
117OPERATING PROCEDURE PHOTOSPhoto 44. Removing the thermistor <Outdoor 2-phase pipe> (TH6)(1) Remove the service panel. (See figure 1.)(2) Remo
118OPERATING PROCEDUREPHOTOS7. Removing the 4-way valve coil (21S4),and linear expansion valve coil (LEV-A)(1) Remove the service panel. (See figure 1
119OPERATING PROCEDUREPHOTOS11. Removing the reactor (DCL) and capacitor (CE)(1) Remove the service panel. (See figure 1.)(2) Remove the top panel. (S
12Representative matchingPKA-A12GA PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BAModeCOOLING COOLING COOLING COOLING COOLING COOLINGTotal Capacity
OPERATING PROCEDUREPHOTOS12. Removing the compressor (MC)(1) Remove the service panel. (See figure 1.)(2) Remove the top panel. (See figure 1.)(3) Rem
13OUTDOOR UNIT Unit : mm<inch>PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS1/2 conduit hole144<5-21/32>2-ø22.2<7/8>
14PUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BS Unit : mm<inch>PUY-A24/30/36NHA2 PUY-A24/30/36NHA2-BSMin. 10mm <3/8>Min. 10mm<3/8>Mi
15PUZ-A42NHA2 PUZ-A42NHA2-BS Unit : mm<inch>PUY-A42NHA2 PUY-A42NHA2-BSTerminal BlockLeft ··· Power supply wiringRight ··· Indoor/Outdoor wir
16TB1MCMF121S463HTH3TH4TH6TH7TH8LEV-ACY1,CY2Terminal Block<Power Supply, Indoor/Outdoor>Motor for CompressorFan Motor Solenoid Valve (Four-Way V
17P. B.C. B.CNF1(WHT)MF1MS3~71TRANSCNDC(PNK)31TH7/6(RED)63H(YLW)TH3(WHT)TH4(WHT)TH7 TH6 TH3 TH441212131t≈ t° t° t°63HLEV-A(WHT)LEV-AMLED1LED261CNVMN
18SYMBOLM-NET ADAPTERNAMETB7CN5CNDCN2MSW1SW11SW12LED1LED2LED3LED4LED5Terminal Block<M-net connection>Connector<Transmission>Connector<P
19TB1MCMF1,MF221S463H63LTH3TH4TH6TH7TH8LEV-ADCLTerminal Block<Power Supply, Indoor/Outdoor >Motor for CompressorFan Motor Solenoid Valve (Four-W
21-1. INDOOR UNITModel name Service Ref.ServiceManual No.PLA-A12/18/24/30/36/42BA PLA-A12/18/24/30/36/42BA1OCH420OCB420PCA-A24/30/36/42GA PCA-A24/30/3
208WIRING SPECIFICATIONS8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT (A-control application)The following connection patterns are available.The o
218-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIESThe following connection patterns are available.The outdoor unit power supply patterns vary on
22w The max. cable length may vary depending on the condition of installation, humidity or materials, etc.Indoor unit-Outdoor unitOutdoor power supply
238-4. M-NET WIRING METHOD(Points to notice)(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electrom
248-4-3. Regulations in address settingsIn case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the
259REFRIGERANT SYSTEM DIAGRAMPUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BSOutdoor heat exchangerThermistor(TH3)Thermistor(TH6)DistributorServiceport(check
26Outdoor heat exchangerThermistor(TH3)Thermistor(TH6)DistributorServiceport(check)AccumulatorCompressorRefrigerant GAS pipe15.88A({5/8)Refrigerant LI
272. Start and finish of test run• Operation from the indoor unitExecute the test run using the installation manual for the indoor unit.• Operation fr
2810 TROUBLESHOOTING<Error code display by self-diagnosis and actions to be taken for service (summary)>Present and past error codes are logged
29[TEST] buttonPipe (liquid) temperatureDisplays the remainingtest run time."TEST RUN" and the currently selectedoperation mode are displaye
32 SAFETY PRECAUTIONCautions for units utilizing refrigerant R410A2-2. CAUTIONS RELATED TO NEW REFRIGERANTUse new refrigerant pipes.Make sure that the
30ON/OFFTEMPFANVANEMODECHECKLOUVERTEST RUN AUTO STOP AUTO STARThminRESETSETCLOCKTESTRUNCOOL75623,4Test run [for wireless remote controller]Meas
3110-3. HOW TO PROCEED "SELF-DIAGNOSIS"10-3-1. When a Problem Occurs During OperationIf a problem occurs in the air conditioner, the indoor
32Transmission data from remote controllerTransmission data on transmission pathWhen the number of data errors is "02":D Press the ON/OFF bu
33[Procedure]1. Press the CHECK button twice.2. Press the temperaturebuttons.3. Point the remote controller at the sensor on the indoor unit andpress
34[Output pattern A] Errors detected by indoor unit[Output pattern B]E9*1 If the beeper does not sound again after the initial 2 beeps to confirm the
3510-4. SELF-DIAGNOSIS ACTION TABLE<Abnormalities detected when the power is turned on>(Note 1) Refer to indoor unit section for code P and code
36Error CodeAbnormal point and detection method Judgment and actionEb(6845)Miswiring of indoor/outdoor unit connecting wire (converse wiring ordisconn
37<Abnormalities detected while unit is operating>Error CodeAbnormal point and detection method Judgment and actionU1(1302)High pressure (High-p
38ThermistorsOpen detection Short detectionSymbol NameTH3TH6TH7TH8– 40:[-40˚F] or below– 40:[-40˚F] or below– 40:[-40˚F] or below– 27:[-17˚F] or below
39UH(5300)Current sensor error• Abnormal if current sensor detects –1.5Ato 1.5A during compressor operation.(This error is ignored in case of test run
4GravimeterUnit[3] Service toolsUse the below service tools as exclusive tools for R410A refrigerant.No. Tool name Specifications1 Gauge manifold ·Onl
40Error CodeAbnormal point and detection method Judgment and actionUL(1300)Low pressure (63L worked)Abnormal if 63L is worked (under-0.03MPa) during c
41Error CodeAbnormal point and detection method Judgment and actionE9(6841)Indoor/outdoor unit communicationerror (Transmitting error) (Outdoor unit)(
42Error CodeAbnormal point and detection method Case Judgment and actionA0(6600)Address duplicate definitionThis error is displayed when transmissionf
43A6(6606)Communication error with communica-tion processorDefective communication between unitprocessor and transmission processorNote) The address a
445. If displayed address or attribute isFRESH MASTER, Indoor unit detects abnormality whenindoor unit transmitted to FRESH MAS-TER and there was no r
4510-5. TROUBLESHOOTING BY INFERIOR PHENOMENAPhenomenaFactor Countermeasure1. Remote controller display does notwork.2. “PLEASE WAIT” display is remai
46PhenomenaFactorCountermeasure7. Remote controller display works nor-mally and the unit performs heatingoperation, however, the capacitycannot be ful
47How long is “PLEASE WAIT” kept being displayed on the remote controller?6 minutes or more2 minutes or less2 to 6 minutesNONOYESYESAre any error code
48AC 187V to AC 253V?AC 187V to AC 253V?AC 187V to AC 253V?DC 12V to DC 16V?DC 12V to DC 16V?NOYESNOYESNOYESYESNOYESNOCheck the voltage between S1 an
49AC 187V to AC 253V?Are there looseness or disconnection of the indoor/outdoor connecting wire?Is anything displayed?DC 17V to DC 28V?Is “E8” display
52-3. CAUTIONS FOR REFRIGERANT PIPING WORKNew refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R
50DC 10V to DC 16V?YESNOLightingBlinkingLightingBlinkingCheck the voltage of the terminal block (TB6) of the remote controller.Check the status of the
511 The operating display of remote controller does not come on.Phone Calls From Customers How to Respond Note1 Check if power is supplied to air con
52Phone Calls From Customers How to Respond Note1 Check the set temperature of remote controller. The outdoor unit cannot be operated if the set
533 Air blows out for a while after HEAT operation is stopped.Phone Calls From Customers How to Respond Note3 This is not a malfunction. The
54Phone Calls From Customers How to Respond NoteThis is not a malfunction.This may occur when the operation gets started in the room of high humidity
55123456MGrayOrangeRedYellowBlack123456MParts nameCheck pointsDisconnect the connector then measure the resistance with a tester. (At the ambient temp
56Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor. Give attention to the service. · Do not pull out the connector (CNF1,
57Thermistor R0 = 15k' ±3%B constant = 3480 ± 2%t (:): Rt =15exp{3480( 273+t – 273)}T (˚F): RT =15exp{3480( 273+(T– 32)/1.8 – 273)}10-7. HOW TO C
58<Output pulse signal and the valve operation>(2) Linear expansion valve operationABCOpenExtra tightning (about 32 pulse)Pulse number500 pulseO
59<Output pulse signal and the valve operation>(2) Linear expansion valve operationABCOpenExtra tightning (about 32 pulse)Pulse number500 pulseO
63 FEATURESCHARGELESS SYSTEMPRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.(Max. 100ft, 30m (A42) / Max. 70ft, 20m (A12-36))The ref
60Main bodyLead wireStopperCoilABe sure to attach thestopper to pipe B.BA(3) How to attach and detach the coil of linear expansion valve (A12, 18)<
61Main bodyLead wireStopperCoilABe sure to attach the stopper.A(4) How to attach and detach the coil of linear expansion valve (A24, 30, 36, 42)<Co
6210-8. EMERGENCY OPERATION (1) When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor
63(5) Operation data during emergency operationDuring emergency operation, no communication is performed with the indoor unit, so the data items neede
6410-9. TEST POINT DIAGRAMOutdoor controller circuit boardPUZ-A18/24/30/36/42NHA2 PUZ-A18/24/30/36/42NHA2-BSPUY-A12/18/24/30/36/42NHA2 PUY-A12/18/24/3
65Outdoor noise filter circuit boardPUZ-A18NHA2 PUZ-A18NHA2-BSPUY-A12/18NHA2 PUY-A12/18NHA2-BSLO, NOVoltage of 208/230V AC is output. (Connect to the
66LO, NOVoltage of 208/230V AC is output.(Connect ACL)CN52C52C relay signal(Connect to the outdoor controller circuit board(CN52C))CN5Primary current(
67CNAC1, CNAC2208/230V AC(Connect to theoutdoor controllercircuit board(CNAC))EIConnect to the earthLI, NIVoltage of 208/230V AC is input.(Connect to
68CN2Connect to the outdoor controller circuit board (CN2)1-5:Outdoor power circuit board ➔ Transmitting signalto the outdoor controller circuit board
69Outdoor power circuit boardPUZ-A30/36/42NHA2PUZ-A30/36/42NHA2-BSPUY-A30/36/42NHA2PUY-A30/36/42NHA2-BSTABP1Connect to 52CTABP2/SC-P2Connect toACTMCN4
74 SPECIFICATIONSService Ref. PUZ-A18NHA2 PUZ-A24NHA2 PUZ-A30NHA2 PUZ-A36NHA2 PUZ-A42NHA2PUZ-A18NHA2-BS PUZ-A24NHA2-BS PUZ-A30NHA2-BS PUZ-A36NHA2-BS P
70N1Non-connectloConnect to the outdoor power circuit board(TABN2)L1, L2Connect tothe DCL(Reactor)PConnect to the outdoor power circuit board(TABP2)+D
71SwitchTypeofswitchDipswitchPushswitchSW112No.Function Effective timingAction by the switch operationForced defrost w1 Start NormalWhen compressor is
72123,4,563456123,4123456786ON OFFNo.Function Effective timingAction by the switch operationNo functionPower failureautomatic recovery w2No functionMo
73Special function(a) Low-level sound priority mode (Local wiring)Unit enters into Low-level sound priority mode by external signal input setting.Inpu
74<Display function of inspection for outdoor unit>The blinking patterns of both LED1(green) and LED2(red) indicate the types of abnormality whe
75U2U1U8UFUPUHU6U3U4U5U9P1P2P9P4P5P6P8FbE1E2Indication ErrorErrorcodew1Outdoor controller boardContents Inspection methodLED1 (Green)LED2 (Red)3 blink
76<Outdoor unit operation monitor function>[When option part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to outdoor controller board(CNM)]
77SW2 setting1ON23456Display detailExplanation for display UnitPipe temperature / Liquid(TH3)– 40~194– 40~194 (– 40~90:)(When the coil thermistor dete
78SW2 setting1ON23456Display detailExplanation for display UnitPipe temperature / Liquid(TH3) on erroroccurring– 40~194– 40~194 (– 40~90:)(When the co
79SW2 setting1ON23456Display detailExplanation for displayUnitCapacity setting displayDisplayed as an outdoor capacity codeCodedisplay1ON234561ON23456
8Service Ref.PUY-A12NHA2 PUY-A18NHA2 PUY-A24NHA2 PUY-A30NHA2 PUY-A36NHA2 PUY-A42NHA2PUY-A12NHA2-BS PUY-A18NHA2-BS PUY-A24NHA2-BS PUY-A30NHA2-BS PUY-A3
801ON23456degFDischarge superheat. SHd0~327Cooling = TH4-TH6Heating = TH4-TH50~327 (0~182degC)(When the temperature is 100degF or more, hun-dreds digi
81SW2 settingDisplay detailExplanation for display Unit1ON23456%Capacity save0~100When air conditioner is connected to M-NET and capacity save mode is
82SW2 settingDisplay detailExplanation for display Unit1ON23456PulseLEV-A opening pulse on error occurring0~4800~480(When it is 100 pulse or more, hun
83SW2 settingDisplay detailExplanation for display UnitdegF0~327 (0~182degC)(When the temperature is 100degF or more, hundreds digit, tens digit and o
84SW2 settingDisplay detailExplanation for display UnitControlling status of compressor operating frequency1ON23456CodedisplayThe following code will
85● Reduces maintenance work drastically.● Enables you to check operation data of the indoor and outdoor units by remote controller.Furthermore, use o
86● Data measurementWhen the operation is stabilized, measure operation data as explained below.(4) Press the [TEMP] buttons ( and ) to select the
8711-2.GUIDE FOR OPERATION CONDITIONInspection item ResultPower supplyLoose con-nectionBreaker Good RetightenedTerminal block Outdoor Unit Good Retigh
8812 FUNCTION SETTINGFunctionSettingsMode No.Setting No. : Initial setting (when sent from the factory)RemarksPower failure automatic recoveryIndoor
89FunctionSettingsNo.ModeNo.Setting: Initial setting (Factory setting)- : Not available4-WaycassetteCeiling suspendedWallmountedPCA-GAPKA-GA(L)PKA-FA(
Piping Length (one way)ChargedFactoryService Ref. 50ft 60ft 70ft 80ft 90ft 100ft 110ft 120ft 130ft 140ft 150ft 160ft 165ft15m 18m 21m 24m 27m 30m 33m
906 Select mode No. 02 (room temperature detection position).7 Select setting No. 03 (remote controller fixed). (Use F and G.)8 Enter the sett
91[Operating Procedure]1 Check the setting items provided by function selection.If settings for a mode are changed by function selection, the function
92By setting unit number with the button, specified indoor unit starts performing fan operation. Detect which unit is assigned to which numbe
9312-2. FUNCTION SELECTION OF REMOTE CONTROLLERThe setting of the following remote controller functions can be changed using the remote controller fun
94OFFno1no2OFFONOFFONOFFOFFCALL-ONOFFONOFF˚C˚FPAR-21MAAON/OFFFILTERCHECKOPERATIONCLEARTESTTEMP.MENUBACK DAYMONITOR/SETCLOCKON/OFFEnglishGermanySpanish
9512-3. Function selection of wireless remote controllerTEMPERATURE DISPLAY::/--F SETTING (Change of temp mode from --F to ::)1 Press the set button w
9613-1. HOW TO "MONITOR THE OPERATION DATA"• Turn on the [Monitoring the operation data]ADCB(1)(2)(3)(4)(5)(6)(7)(1) Press the TEST button
9713-2. REQUEST CODE LIST* Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.Reques
98Request codeRequest contentDescription(Display range)Unit Remarks50515253545556575859606162636465666768697071727374757677787980818283848586878889909
99Request codeRequest contentDescription(Display range)Unit Remarks10310410510610710810911011111211311411511611711811912012112212312412512612712812913
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