Page 2 - REFERENCE MANUAL
2 1-1. INDOOR UNIT Model name Service Ref. Service Manual No. PLA-A12/18/24/30/36/42BA PLA-A12/18/24/30/36/42BA 1 OCH420 OCB420 PCA-A24/30/36/42GA PCA-A24/30/36/42GA 2 OC368 PKA-A12/18GA PKA-A12/18GA 2 OC369 PKA-A12/18GAL PKA-A12/18GAL 2 PKA-A24/30/36FA PKA-A24/30/36FA 2 PKA-A24/30/36FAL PKA-A24/30/...
Page 3 - SAFETY PRECAUTION; Cautions for units utilizing refrigerant R410A; Use new refrigerant pipes.
3 2 SAFETY PRECAUTION Cautions for units utilizing refrigerant R410A 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Use new refrigerant pipes. Make sure that the inside and outside of refrige-rant piping is clean and it has no contaminationsuch as sulfur hazardous for use, oxides, dirt, shaving particles,...
Page 4 - Tool name; Be sure to use a filter drier for new refrigerant.
4 Gravimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. Tool name Specifications 1 Gauge manifold ·Only for R410A ·Use the existing fitting specifications. ·Use high-tension side pressure of 5.3MPa·G or over. 2 Charge hose ·Only for R410A ·Use pr...
Page 5 - -3. CAUTIONS FOR REFRIGERANT PIPING WORK; Thickness of pipes
5 2-3. CAUTIONS FOR REFRIGERANT PIPING WORK New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A issame as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as theworking pressure of R41...
Page 6 - FEATURES
6 3 FEATURES CHARGELESS SYSTEMPRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.(Max. 100ft, 30m (A42) / Max. 70ft, 20m (A12-36)) The refrigerant circuit with LEV(Linear Expansion Valve) and accumulator always control the optimal refrigerant levelregardless of the length (A42: 100ft,...
Page 7 - SPECIFICATIONS
7 4 SPECIFICATIONS Service Ref. PUZ-A18NHA2 PUZ-A24NHA2 PUZ-A30NHA2 PUZ-A36NHA2 PUZ-A42NHA2 PUZ-A18NHA2-BS PUZ-A24NHA2-BS PUZ-A30NHA2-BS PUZ-A36NHA2-BS PUZ-A42NHA2-BS Power supply Phase Single Cycle 60Hz Voltage 208/230V MCA A 13 18 25 25 26 MOCP A 20 30 40 40 40 Breaker size A 15 25 30 30 30 Extern...
Page 9 - Longer pipe than 70 or 100 ft, additional charge is required.; DATA
Piping Length (one way) Charged Factory Service Ref. 50ft 60ft 70ft 80ft 90ft 100ft 110ft 120ft 130ft 140ft 150ft 160ft 165ft 15m 18m 21m 24m 27m 30m 33m 37m 40m 43m 46m 49m 50m PUY-A12NHA2-BS PUY-A12NHA2 42 oz 44 oz 46 oz 48 oz 50 oz 52 oz - - - - - - - 46 oz 1.2 kg 1.2 kg 1.3 kg 1.4 kg 1.4 kg 1.5 ...
Page 13 - OUTDOOR UNIT; PIPING-WIRING DIRECTION; OUTLINES AND DIMENSIONS
13 OUTDOOR UNIT Unit : mm<inch> PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS 1/2 conduit hole 144<5-21/32> 2-ø22.2<7/8> 22<7/8> 38<1-1/2> 241<9-1/2> Min.100mm<3-15/16> Piping and wiring connection canbe made from the rear direction only. *1 In...
Page 14 - Example of Notes
14 PUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BS Unit : mm<inch> PUY-A24/30/36NHA2 PUY-A24/30/36NHA2-BS , ,,,, ,,,,,, ,,,,, ,,,,,, ,,,,, ,,, ,, ,, ,,,, , ,, , ,,,, , , ,, ,,, , ,, , ,, ,,, , , , ,, ,,, ,, ,, , , ,,, , ,, , , , , , , ,, ,, ,, , , , , , , ,,, , , , ,,, ,,,, , , ,,, , ,, , ,, ,, , , ,, ...
Page 16 - WIRING DIAGRAM
16 TB1MCMF121S463HTH3TH4TH6TH7TH8LEV-A CY1,CY2 Terminal Block<Power Supply, Indoor/Outdoor>Motor for CompressorFan Motor Solenoid Valve (Four-Way Valve) High Pressure SwitchThermistor<Outdoor Pipe> Thermistor<Discharge>Thermistor<Outdoor 2-Phase Pipe>Thermistor<Outdoor>...
Page 20 - WIRING SPECIFICATIONS; Simultaneous twin system
20 8 WIRING SPECIFICATIONS 8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT (A-control application) The following connection patterns are available.The outdoor unit power supply patterns vary on models. 1:1 System Simultaneous twin system A Outdoor unit power supply B Wiring circuit breaker or isol...
Page 21 - * The optional indoor power supply terminal kit is required.
21 8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES The following connection patterns are available.The outdoor unit power supply patterns vary on models. 1:1 System S1S2 L1L2 GR GR 12 L1L2 S1S2S3 S3 * Affix a label B that is included with the manuals near each wiring diagram for the indoor and...
Page 22 - The optional indoor power supply terminal kit is necessary.
22 w The max. cable length may vary depending on the condition of installation, humidity or materials, etc. Indoor unit-Outdoor unit Outdoor power supply Max. 45m, 147ft 3 o AWG15(polar) Max. 50m, 164ft 3 o AWG13(polar) Max. 80m, 262ft 3 o AWG13(polar) and S3 separated Wire No. o Size Be sure to con...
Page 25 - REFRIGERANT SYSTEM DIAGRAM
25 9 REFRIGERANT SYSTEM DIAGRAM PUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BS Outdoor heat exchanger Thermistor(TH3) Thermistor(TH6) Distributor Serviceport(check) Accumulator Compressor Refrigerant GAS pipe15.88 A ( { 5/8) Refrigerant LIQUID pipe9.52 A ( { 3/8) Stop valve(with service port) 4-way valve Se...
Page 27 - Start and finish of test run; • Operation from the indoor unit; Turn on SW4-1 to start test run with the operation mode set by SW4-2.; A B; Stop; repeat step
27 2. Start and finish of test run • Operation from the indoor unit Execute the test run using the installation manual for the indoor unit. • Operation from the outdoor unit By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation mode...
Page 28 - TROUBLESHOOTING; age, loosened connections and incorrect polarity.
28 10 TROUBLESHOOTING <Error code display by self-diagnosis and actions to be taken for service (summary)>Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit.Actions to be taken for service, which depends on whether or not the ...
Page 29 - be displayed regardless of incorrect wiring.; In case OUTDOOR BOARD LED is digital display, — and —; will be displayed alternately every second.; • Outdoor unit’s protection device connector is open.; Operating procedures; Fb
29 [TEST] button Pipe (liquid) temperature Displays the remainingtest run time. "TEST RUN" and the currently selectedoperation mode are displayed altemately. A B C ° F 59 • In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 hours.• The room...
Page 30 - Test run [for wireless remote controller]; while following steps
30 ON/OFF TEMP FAN VANE MODE CHECK LOUVER TEST RUN AUTO STOP AUTO START h min RESET SET CLOCK TEST RUN COOL 7 5 6 2 3 , 4 Test run [for wireless remote controller] Measure an impedance between the power supply terminal block onthe outdoor unit and ground with a 500V Megger and check that it isequal ...
Page 31 - CHECK
31 10-3. HOW TO PROCEED "SELF-DIAGNOSIS" 10-3-1. When a Problem Occurs During Operation If a problem occurs in the air conditioner, the indoor and outdoor units will stop,and the problem is shown in the remote controller display. 1 [CHECK] and the refrigerant address are displayed on the tem...
Page 33 - Malfunction-diagnosis method at maintenance service>
33 [Procedure] 1. Press the CHECK button twice. 2. Press the temperature buttons. 3. Point the remote controller at the sensor on the indoor unit andpress the HOUR button. 4. Point the remote controller at the sensor on the indoor unit andpress the ON/OFF button. • "CHECK" lights, and refrig...
Page 36 - Eb; Case; Defective indoor power board
36 Error Code Abnormal point and detection method Judgment and action Eb (6845) Miswiring of indoor/outdoor unit connecting wire (converse wiring ordisconnection)Outdoor controller circuit board can automatically set the unit number of indoorunits.Abnormal if the indoor unit number cannotbe set with...
Page 37 - Error Code;
37 <Abnormalities detected while unit is operating> Error Code Abnormal point and detection method Judgment and action U1 (1302) High pressure (High-pressure switch63H worked)Abnormal if high-pressure switch 63Hworked ( w ) during compressor operation. w 4.15 MPa [602PSIG] 63H: High-pressure s...
Page 40 - If the unit is not normal after replacing; Remote controller control board; Defective remote controller
40 Error Code Abnormal point and detection method Judgment and action UL (1300) Low pressure (63L worked)Abnormal if 63L is worked (under-0.03MPa) during compressor operation.63L: Low-pressure switch (A42N only) 1 Stop valve of outdoor unit isclosed during operation. 2 Disconnection or loose connect...
Page 43 - Continued to the next page.
43 A6 (6606) Communication error with communica-tion processorDefective communication between unitprocessor and transmission processorNote) The address and attribute display at remote controller indicate the con-troller that detected abnormality. 1 Data of transmission proces-sor or unit processor i...
Page 44 - If displayed address or attribute is; From the previous page.; If displayed address or attribute is
44 5. If displayed address or attribute is FRESH MASTER, Indoor unit detects abnormality whenindoor unit transmitted to FRESH MAS-TER and there was no reply (ACK). 1 During sequential operation ofindoor unit and FRESH MAS-TER of other refrigerant sys-tem, if indoor unit transmits toFRESH MASTER whil...
Page 45 - 0-5. TROUBLESHOOTING BY INFERIOR PHENOMENA
45 10-5. TROUBLESHOOTING BY INFERIOR PHENOMENA Phenomena Factor Countermeasure 1. Remote controller display does not work. 2. “PLEASE WAIT” display is remained on the remote controller. 3. When pressing the remote controller operation switch the OPERATIONdisplay is appeared but it will beturned off ...
Page 48 - Symptoms: Nothing is displayed on the remote controller
48 AC 187V to AC 253V? AC 187V to AC 253V? AC 187V to AC 253V? DC 12V to DC 16V? DC 12V to DC 16V? NO YES NO YES NO YES YES NO YES NO Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit. Check the voltage among L1 and L2 on the terminal block (TB1) of the outdoor power...
Page 49 - Check the status
49 AC 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” displayed? Can all the indoor unit be operated? Check the voltage between S2 and S3 on the terminal block of the outdoor unit. NO YES Not lighting. Bli...
Page 57 - Medium temperature thermistor; Temperature
57 Thermistor R0 = 15k ' ± 3% B constant = 3480 ± 2% t ( : ): R t =15exp{3480( 273+t – 273 )} T (˚F): R T =15exp{3480( 273+(T– 32)/1.8 – 273 )} 10-7. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Outdoor pipe> (TH3)• Thermistor <Outdo...
Page 58 -
58 <Output pulse signal and the valve operation> (2) Linear expansion valve operation A B C Open Extra tightning (about 32 pulse) Pulse number 500 pulseOpening a valveall the way Close V alve position (capacity) Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8 Closing a valve : 1 → 2 → 3 → ...
Page 62 - (2) Check the following items and cautions for emergency operation; this period, cold air will blow out from the indoor unit.
62 10-8. EMERGENCY OPERATION (1) When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency opera-tion switch (SWE) to ON and...
Page 63 - (5) Operation data during emergency operation
63 (5) Operation data during emergency operation During emergency operation, no communication is performed with the indoor unit, so the data items needed for operationare set to the following values: Operation data Intake temperature (TH1) Indoor fluid pipe temperature (TH2) Indoor 2-phase pipe temp...
Page 70 - lo; DCL; Load; Upper side; Connection and internal circuit diagram
70 N1 Non-connect lo Connect to the outdoor power circuit board(TABN2) L1, L2 Connect tothe DCL(Reactor) P Connect to the outdoor power circuit board(TABP2) + DCL L1 L2 ACTM P Io N1N2 (+) (–) Load Active filter modulePUZ-A30/36/42NHA2 PUZ-A30/36/42NHA2-BS PUY-A30/36/42NHA2 PUY-A30/36/42NHA2-BS N2 No...
Page 73 - Brown 2
73 Special function(a) Low-level sound priority mode (Local wiring) Unit enters into Low-level sound priority mode by external signal input setting.Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual. Adding a commercial timer ...
Page 76 - Operation indicator SW2 : Indicator change of self diagnosis; second; Display during error postponement; Display Inspection unit
76 <Outdoor unit operation monitor function>[When option part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to outdoor controller board(CNM)]Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on ‘A-Contr...
Page 82 - Pulse
82 SW2 setting Display detail Explanation for display Unit 1 ON 2 3 4 5 6 Pulse LEV-A opening pulse on error occurring0~480 0~480(When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 130 pulse; 0.5 secs. 0.5secs. 2 secs. ˚F Indoor room tempe...
Page 85 - Reduces maintenance work drastically.; Remote controller button information; button for 3 seconds to switch to maintenance mode.; MODE; button to select the desired operation mode.; ] Waiting for stabilization; Stabilized; Discharge temperature 147 ̊F; EASY MAINTENANCE FUNCTION
85 ● Reduces maintenance work drastically. ● Enables you to check operation data of the indoor and outdoor units by remote controller.Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, evenfor inverter models. 11-1.MAINTENANCE MODE ...
Page 86 - [Display example for accumulated operating time]; Display
86 ● Data measurementWhen the operation is stabilized, measure operation data as explained below. (4) Press the [TEMP] buttons ( and ) to select the desired refrigerant address. [Screen B ] (5) Select the type of data to be displayed. After selecting, go to step (6). Compressor information MENU butt...
Page 87 - Check Points; Enter the temperature differences between; Result
87 11-2.GUIDE FOR OPERATION CONDITION Inspection item Result Power supply Loose con- nection Breaker Good Retightened Terminal block Outdoor Unit Good Retightened Indoor Unit Good Retightened (Insulation resistance) M " (Voltage) V 1 Accumulated operating time Time 2 Number of ON/OFF times Times...
Page 88 - FUNCTION SETTING; Function; 2-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER; No1. Average data of the
88 12 FUNCTION SETTING Function Settings Mode No. Setting No. : Initial setting (when sent from the factory) Remarks Power failure automatic recoveryIndoor temperature detecting LOSSNAY connectivity Power supply voltageAuto mode(only for PUZ)Frost prevention temperatureHumidifier control Change of d...
Page 90 - 2-1-1. Selecting functions using the wired remote controller
90 6 Select mode No. 02 (room temperature detection position). 7 Select setting No. 03 (remote controller fixed). (Use F and G .) 8 Enter the setting. (Press E .) Finished 0 End function display. (Press A and B at the same time.) Example:Selecting room temperaturedetection position YES YES NO NO 9 S...
Page 93 - 2-2. FUNCTION SELECTION OF REMOTE CONTROLLER
93 12-2. FUNCTION SELECTION OF REMOTE CONTROLLER The setting of the following remote controller functions can be changed using the remote controller function selection mode.Change the setting when needed. Item 1 1.Change language("CHANGE LANGUAGE")2.Function limit("FUNCTION SELECTION"...
Page 95 - Press the set button with something sharp at the end. MODEL SELECT
95 12-3. Function selection of wireless remote controllerTEMPERATURE DISPLAY : : / -- F SETTING (Change of temp mode from -- F to : : ) 1 Press the set button with something sharp at the end. MODEL SELECT blinks. 2 Press the button. “F:” blinks. 3 Press the button. “C:” blinks. 4 Press the set butto...
Page 96 - B: Refrigerant address; MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER
96 13-1. HOW TO "MONITOR THE OPERATION DATA" • Turn on the [Monitoring the operation data] A D C B (1) (2) (3) (4) (5) (6) (7) (1) Press the TEST button for 3 seconds so that [Maintenance mode] appears on the screen (at A ). (2) Press the CHECK button for 3 seconds to switch to [Maintenance ...
Page 106 - DISASSEMBLY PROCEDURE; OPERATING PROCEDURE; back panel; right and two from the left side, and detach the top panel.; Removing the fan motor; board in the electrical parts box.; Photo 1
106 14 DISASSEMBLY PROCEDURE OPERATING PROCEDURE PHOTOS PUZ-A18NHA2 PUZ-A18NHA2-BS 1. Removing the top panel, service panel, front panel and back panel (1) Remove the top panel fixing screws (4 ✕ 10), one from the right and two from the left side, and detach the top panel. (2) Remove 1 service panel...
Page 107 - Electrical parts box; Removing the electrical parts box; Photo 5; Clamp
107 Electrical parts box Controller circuitboard (C.B.) Electrical parts box fixingscrew Terminal block(TB1) OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) and thermistor <Outdoor pipe> (TH3) (1) Remove the service panel. (See photo 1.)(2) Remove the t...
Page 108 - Photo 7; Sensor holder; Photo 8
108 OPERATING PROCEDURE PHOTOS 5. Removing the thermistor <Outdoor> (TH7) (1) Remove the service panel. (See photo 1.)(2) Remove the top panel. (See photo 1.)(3) Disconnect the connector TH7 (red) on the controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wi...
Page 109 - ing the right side panel.; The reactor is attached to the rear of the electrical parts box.
109 9. 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. (See photo 1.)(4) Remove the conduit cover and cord cover. (See photo 2.)(5) Remove the back panel. (See photo 1.)(6) Remove the electrical parts box...
Page 110 - (10) Remove the welded pipe of motor for compressor inlet; Note: Recover refrigerant without spreading it in the air.
110 OPERATING PROCEDURE PHOTOS Photo 13 Photo 14 Compressor(MC) Valve bed Separator Separatorfixing screw Compressorfixing nut Accumulator Accumulator Outlet Inlet 12. Removing the compressor (MC) (1) Remove the service panel. (See photo 1.)(2) Remove the top panel. (See photo 1.)(3) Remove the fron...
Page 111 - Removing the service panel and top panel; Figure 1; (5) Disconnect the connector CNF1 on controller circuit; Photo 3; ) from the valve bed to
111 OPERATING PROCEDURE PHOTOS & ILLUSTRATION PUZ-A24/30/36NHA2 PUZ-A24/30/36NHA2-BS 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 ✕ 10) and slide the hook on the right downward to remove the service panel. (2) Remove screws (3 for front, 3 for rear/5 ✕ ...
Page 112 - Photo 6
112 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) (1) Remove the service panel. (See figure 1.)(2) Remove the top panel. (See figure 1.)(3) Disconnect the connectors, TH6 and TH7 (red), on the controller circuit board in the electrical parts box. (4) Loosen...
Page 114 - Removing the bypass valve; removing the right side panel.; Reactor fixing screw; rear of the unit and remove the right side panel.; removing the right side panel.; Bypass valve
114 OPERATING PROCEDURE PHOTOS 10. Removing the bypass valve (1) Remove the service panel. (See figure 1.)(2) Remove the top panel. (See figure 1.)(3) Remove the electrical parts box. (See photo 3.)(4) Remove 3 right side panel fixing screws (5 ✕ 10) in the rear of the unit and remove the right side...
Page 116 - circuit board in electrical parts box.; ) from the valve bed to remove the lead wire.
116 OPERATING PROCEDURE PHOTOS & ILLUSTRATION PUZ-A42NHA2 PUZ-A42NHA2-BS 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 ✕ 10) and slide the hook on the right downward to remove the service panel. (2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the t...
Page 117 - Photo 4; Lead wire of thermistor
117 OPERATING PROCEDURE PHOTOS Photo 4 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) (1) Remove the service panel. (See figure 1.)(2) Remove the top panel. (See figure 1.)(3) Disconnect the connectors, TH6 and TH7 (red), on the controller circuit board in the electrical parts box. (4...
Page 119 - remove the capacitor.
119 OPERATING PROCEDURE PHOTOS 11. Removing the reactor (DCL) and capacitor (CE) (1) Remove the service panel. (See figure 1.)(2) Remove the top panel. (See figure 1.)(3) Remove the electrical parts box. (See photo 3.)<Removing the reactor>(4) Remove 4 reactor fixing screws (4 ✕ 10) and remove...
