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-A24/30/36/42KA PCA-A24/30/36/42KA OCH455 OCB455 PKA-A12/18HA PKA-A12/18HA OCH456 OCB456 OCH457 OCB457 PKA-A12/18HAL PKA-A12/18HAL PKA-A24/30/36KA PKA-A24/30/36KA.TH PKA...
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 - When charging directly from cylinder
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 is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R...
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-A18NHA3 PUZ-A24NHA3 PUZ-A30NHA3 PUZ-A36NHA3 PUZ-A42NHA3 PUZ-A18NHA3-BS PUZ-A24NHA3-BS PUZ-A30NHA3-BS PUZ-A36NHA3-BS PUZ-A42NHA3-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
9 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-A12NHA3-BS PUY-A12NHA3 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....
Page 13 - OUTDOOR UNIT; OUTLINES AND DIMENSIONS; PIPING-WIRING DIRECTION
13 OUTDOOR UNIT Unit: mm<inch> PUZ-A18NHA3 PUZ-A18NHA3-BS PUY-A12/18NHA3 PUY-A12/18NHA3-BS 6 OUTLINES AND DIMENSIONS 1/2 conduit hole 144<5-21/32> 2- W 22.2<7/8> 22<7/8> 38<1-1/2> 241<9-1/2> Min.100mm<3-15/16> Piping and wiring connection can be made from th...
Page 14 - Example of Notes
14 PUZ-A24/30/36NHA3 PUZ-A24/30/36NHA3-BS Unit: mm<inch> PUY-A24/30/36NHA3 PUY-A24/30/36NHA3-BS Min. 10mm <3/8> Min. 10mm <3/8> Min. 100mm <3-15/16> Min. 500mm <19-1 1/16> Min. 100mm <3-15/16> Min. 500mm <191/16> Max. 300mm<1-3/16> Min. 10mm <3/8>...
Page 16 - WIRING DIAGRAM
16 PUZ-A18NHA3 PUZ-A18NHA3-BS PUY-A12/18NHA3 PUY-A12/18NHA3-BS 7 WIRING DIAGRAM TB1MCMF121S463HTH3TH6TH7TH8TH32LEV-A CY1,CY2 Terminal Block<Power Supply, Indoor/Outdoor>Motor for CompressorFan Motor Solenoid Valve (Four-Way Valve)High Pressure SwitchThermistor<Outdoor Pipe>Thermistor<...
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 Outdoor unit power supply Wiring circuit breaker or isolatin...
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 + 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 % AWG15(polar) Max. 50m, 164ft 3 % AWG13(polar) Max. 80m, 262ft 3 % AWG13(polar) and S3 separated Wire No. % Size Be sure to con...
Page 25 - REFRIGERANT SYSTEM DIAGRAM
25 9 REFRIGERANT SYSTEM DIAGRAM PUZ-A24NHA3(-BS) PUZ-A30NHA3(-BS) PUZ-A36NHA3(-BS) Outdoor heat exchanger Thermistor(TH3) Thermistor(TH6) Distributor Serviceport(check) Accumulator Compressor Refrigerant GAS pipe15.88 ( W 5/8) Refrigerant LIQUID pipe9.52 ( W 3/8) Stop valve(with service port) 4-way ...
Page 27 - Start and finish of test run; Operation from the indoor unit; 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 th...
Page 29 - • 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. F • In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 hours.• The room temperatur...
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 , Test run [for wireless remote controller] Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or grea...
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. [CHECK] and the refrigerant address are displayed on the tempe...
Page 33 - Malfunction-diagnosis method at maintenance service>
33 • "CHECK" lights, and refrigerant address "00" blinks.• Check that the remote controller's display has stopped before continuing. • Select the refrigerant address of the indoor unit for the self-diagnosis.Note: Set refrigerant address using the outdoor unit’s DIP switch (SW1). (Fo...
Page 35 - ; Error Code
35 10-4. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is turned on> (Note 1) Refer to indoor unit section for code P and code E. Error Code Abnormal point and detection method Case Judgment and action None — 1 No voltage is supplied to terminal block(TB1) of outdoor unit....
Page 37 -
37 <Abnormalities detected while unit is operating> Error Code Abnormal point and detection method Judgment and action U1 (1302) High pressure (High-pressure switch 63H worked) Abnormal if high-pressure switch 63H worked ( w ) during compressor operation. w 4.15 MPa [602PSIG] 63H: High-pressur...
Page 43 - Continued to the next page.
43 Continued to the next page. A6 (6606) Communication error with communica-tion processor Defective communication between unit processor and transmission processorNote) The address and attribute display at remote controller indicate the con-troller that detected abnormality. 1 Data of transmission ...
Page 44 - From the previous page.
44 5. If displayed address or attribute is FRESH MASTER, Indoor unit detects abnormality when indoor unit transmitted to FRESH MASTER and there was no reply (ACK). 1 During sequential operation of indoor unit and FRESH MASTER of other refrigerant system, if indoor unit transmits to FRESH 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 OPERATION display is appeared but it will be turned of...
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 <O...
Page 58 -
58 <Output pulse signal and the valve operation> (2) Linear expansion valve operation 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 → 4 → 5 ...
Page 62 - (2) Check the following items and cautions for emergency operation
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 an...
Page 63 - (5) Operation data during emergency operation; fl
63 (5) Operation data during emergency operation During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values: Operation data Operation mode Remarks COOL HEAT Intake temperature (TH1) 27 : , 81°F 20.5 : , 69°F ...
Page 70 - Load; Connection and internal circuit diagram
70 Active filter modulePUZ-A30/36/42NHA3 PUZ-A30/36/42NHA3-BSPUY-A30/36/42NHA3 PUY-A30/36/42NHA3-BS L1, L2Connect to the DCL (Reactor) Connect to the outdoor power circuit board(TABP1) Connect to the outdoor power circuit board (TABN1) + – IoConnect to the outdoor power circuit board (TABN2) N2Non-c...
Page 73 - Special function; CNDM; 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 time...
Page 74 - ; EF
74 <Display function of inspection for outdoor unit> The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CN...
Page 76 - ; SW2 setting; 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-C...
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. 0.5 secs. 2 secs. ˚F Indoor room tempe...
Page 83 - degF
83 SW2 setting Display detail Explanation for display Unit degF 0~327 (0~182degC)(When the temperature is 100degF or more, hundreds digit, tens digit and ones digit are displayed by turns.)(Example) When 150degF; 0.5 secs. 0.5 secs. 2 secs. Sub cool on error occurring. SC0~234 Cooling = TH6-TH3 Heat...
Page 85 - EASY MAINTENANCE FUNCTION; Reduces maintenance work drastically.; Switching to maintenance mode; Remote controller button information; TEST; button for 3 seconds to switch to maintenance mode.; Fixed Hz operation; MODE; button to select the desired operation mode.; FILTER; ] Waiting for stabilization; Stabilized; Discharge temperature 147
85 11 EASY MAINTENANCE FUNCTION L Reduces maintenance work drastically. L 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 m...
Page 86 - Data measurement; MENU; Display
86 Data measurement When the operation is stabilized, measure operation data as explained below. (4) Press the [TEMP] buttons ( and ) to select the desired refrigerant address. [Screen ] (5) Select the type of data to be displayed. After selecting, go to step (6). Compressor information MENU button ...
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 Accumulated operating time Time Number of ON/OFF times Times Current A...
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 voltageFrost prevention temperatureHumidifier control Change of defrosting control Not a...
Page 89 - AA
89 Function Settings No. Mode No. Setting : Initial setting (Factory setting) - : Not available 4-Way cassette Ceiling suspended Wall mounted PCA-KA PKA-HA(L) PKA-KA(L) Filter sign 100h 1 2500h 07 2 "Clean the filter" indicator is not displayed 3 Air flow Quiet 1 - (Fan speed) Standard 08 2 ...
Page 90 - 2-1-1. Selecting functions using the wired remote controller
90 Select mode No. 02 (room temperature detection position). Select setting No. 03 (remote controller fixed). (Use and .) Enter the setting. (Press .) Finished End function display. (Press and at the same time.) Example:Selecting room temperaturedetection position YES YES NO NO Selecting functions u...
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 96 - MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER; B: Refrigerant address
96 13 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 13-1. HOW TO "MONITOR THE OPERATION DATA" • Turn on the [Monitoring the operation data] (1) (2) (3) (4) (5) (6) (7) (1) Press the TEST button for 3 seconds so that [Maintenance mode] appears on the screen (at ). (2) Press the CHECK...
Page 106 - DISASSEMBLY PROCEDURE; back panel; Photo 1; OPERATING PROCEDURE
106 14 DISASSEMBLY PROCEDURE 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 fixing screw (4 × 10) and detach the service panel by...
Page 107 - Electrical parts box; they are combined.; Photo 5; Clamp
107 Electrical parts box Controller circuit board (C.B.) Electrical parts box fixing screw Terminal block(TB1) 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 top panel. (See photo 1.)...
Page 108 - replace it together with thermistor
108 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 wire in the rear of the ele...
Page 110 - Note: Recover refrigerant without spreading it in the air.
110 Photo 13 Photo 14 Compressor (MC) Valve bed Separator Separator fixing screw Compressor fixing 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 front panel. (See photo 1....
Page 111 - Removing the service panel and top panel; the hook on the right downward to remove the service; Figure 1; (5) Disconnect the connector CNF1 on controller circuit; Photo 3; Removing the electrical parts box
111 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 top panel and remove it. Figure 1 Top panel fixing screws Top panel Servic...
Page 112 - Photo 6
112 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 the clamp for the lead w...
Page 114 - Reactor fixing screw; rear of the unit and remove the right side panel.; Bypass valve
114 11. 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 panel. (5) Remove the b...
Page 116 - circuit board in electrical parts box.
116 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 top panel and remove it. Figure 1 Top panel fixing screws Top panel Servic...
Page 117 - PHOTOS; Photo 4; Lead wire of thermistor
117 PHOTOS Photo 4 5. Removing the thermistor <Outdoor> (TH7) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7 (red) on the controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wire in th...
