Mitsubishi Electric PUZ-A18NHA Service Manual
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Mitsubishi Electric PUZ-A18NHA Service Manual

Split-type, heat pump air conditioners split-type, air conditioners outdoor unit
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS

Outdoor unit

SERVICE MANUAL

[model names]
PUZ-A18NHA
PUZ-A24NHA
PUZ-A30NHA
PUZ-A36NHA
PUZ-A42NHA
PUZ-A18NHA-BS
PUZ-A24NHA-BS
PUZ-A30NHA-BS
PUZ-A36NHA-BS
PUZ-A42NHA-BS
PUY-A12NHA
PUY-A18NHA
PUY-A24NHA
PUY-A30NHA
PUY-A36NHA
PUY-A42NHA
PUY-A12NHA-BS
PUY-A18NHA-BS
PUY-A24NHA-BS
PUY-A30NHA-BS
PUY-A36NHA-BS
PUY-A42NHA-BS
PUZ-A24/30/36NHA
PUY-A24/30/36NHA
R410A
[Service Ref.]
PUZ-A18NHA
PUZ-A24NHA
PUZ-A30NHA
PUZ-A36NHA
PUZ-A42NHA
PUZ-A18NHA-BS
PUZ-A24NHA-BS
PUZ-A30NHA-BS
PUZ-A36NHA-BS
PUZ-A42NHA-BS
PUY-A12NHA
PUY-A18NHA
PUY-A24NHA
PUY-A30NHA
PUY-A36NHA
PUY-A42NHA
PUY-A12NHA
-BS
1
PUY-A18NHA
-BS
1
PUY-A24NHA
-BS
1
PUY-A30NHA
-BS
1
PUY-A36NHA
-BS
1
PUY-A42NHA-BS
REVISED EDITION-C
Revision:
• "9-2. SEPARATE INDOOR
UNIT/OUTDOOR UNIT
POWER SUPPLIES" is
deleted in REVISED
EDITION-C.
• Some descriptions have
been modified.
• Please void OC367 REVISED
EDITION-B.
PUY-A12NHA
1
NOTE:
PUY-A18NHA
• This manual describes only
1
PUY-A24NHA
service data of the outdoor
1
units.
PUY-A30NHA
1
• RoHS compliant products
PUY-A36NHA
1
have <G> mark on the spec
name plate.
• For servicing RoHS compliant
products, refer to the RoHS
PARTS LIST.
CONTENTS
1. TECHNICAL CHANGES·································2
2. REFERENCE MANUAL··································2
3. SAFETY PRECAUTION··································3
4. FEATURES ·····················································6
5. SPECIFICATIONS···········································7
6. DATA ·······························································9
7. OUTLINES AND DIMENSIONS····················13
8. WIRING DIAGRAM ·······································16
9. WIRING SPECIFICATIONS ··························20
10. REFRIGERANT SYSTEM DIAGRAM··············23
11. TROUBLESHOOTING···································26
12. EASY MAINTENANCE FUNCTION ··············81
13. FUNCTION SETTING····································84
15. DISASSEMBLY PROCEDURE ···················102
16. PARTS LIST ················································117
17. RoHS PARTS LIST ·····································126
June 2007
No.OC367

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Summary of Contents for Mitsubishi Electric PUZ-A18NHA

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS Outdoor unit June 2007 No.OC367 REVISED EDITION-C SERVICE MANUAL R410A [model names] [Service Ref.] PUZ-A18NHA PUZ-A18NHA Revision: PUZ-A24NHA PUZ-A24NHA • “9-2. SEPARATE INDOOR PUZ-A30NHA PUZ-A30NHA UNIT/OUTDOOR UNIT PUZ-A36NHA PUZ-A36NHA POWER SUPPLIES” is...

  • Page 2: Technical Changes

    TECHNICAL CHANGES PUY-A12NHA(-BS) PUY-A12NHA (-BS) PUY-A18NHA(-BS) PUY-A18NHA (-BS) PUY-A24NHA(-BS) PUY-A24NHA (-BS) PUY-A30NHA(-BS) PUY-A30NHA (-BS) PUY-A36NHA(-BS) PUY-A36NHA (-BS) • Controller circuit board(C.B.) has been changed. REFERENCE MANUAL 2-1. INDOOR UNIT Service Model name Service Ref. Manual No. OCH420 PLA-A12/18/24/30/36/42BA PLA-A12/18/24/30/36/42BA OCB420 (Issue scheduled in July, 2007) PLA-A12/18/24/30/36/42AA PLA-A12/18/24/30/36/42AA...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 3-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminals, all supply circuits must be disconnected. 3-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use new refrigerant pipes. Do not use refrigerant other than R410A. In case of using the existing pipes for R22, be careful with If other refrigerant (R22 etc.) is used, chlorine in refrige- the followings.
  • Page 4 [1] Cautions for service (1) Perform service after collecting the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.
  • Page 5 3-3. 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 R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.

  • Page 6: Features

    FEATURES PUZ-A18NHA PUZ-A24/30/36NHA PUZ-A18NHA-BS PUZ-A24/30/36NHA-BS PUY-A12/18NHA PUY-A24/30/36NHA PUY-A12/18NHA PUY-A24/30/36NHA PUY-A12/18NHA PUY-A24/30/36NHA PUZ-A42NHA PUZ-A42NHA-BS PUY-A42NHA PUY-A42NHA-BS CHARGELESS SYSTEM PRE-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 level regardless of the length (A42: 100ft, 30m max.

  • Page 7: Specifications

    SPECIFICATIONS Service Ref. PUZ-A18NHA PUZ-A24NHA PUZ-A30NHA PUZ-A36NHA PUZ-A42NHA PUZ-A18NHA-BS PUZ-A24NHA-BS PUZ-A30NHA-BS PUZ-A36NHA-BS PUZ-A42NHA-BS Power supply Phase Single Cycle 60Hz Voltage 208/230V MOCP Breaker size External finish Munsell 3Y 7.8/1.1 Heat exchanger Plate fin coil Defrost method Reverse cycle Crankcase heater...
  • Page 8 Service Ref. PUY-A12NHA PUY-A18NHA PUY-A24NHA PUY-A30NHA PUY-A36NHA PUY-A42NHA PUY-A12NHA PUY-A18NHA PUY-A24NHA PUY-A30NHA PUY-A36NHA PUY-A42NHA-BS PUY-A12NHA -BS PUY-A18NHA -BS PUY-A24NHA -BS PUY-A30NHA -BS PUY-A36NHA Power supply Phase Single Cycle 60Hz Voltage 208/230V MOCP Breaker size External finish Munsell 3Y 7.8/1.1 Heat exchanger Plate fin coil Defrost method Crankcase heater...

  • Page 9: Data

    52 oz 46 oz PUY-A12NHA PUY-A12NHA PUY-A12NHA 1.2 kg 1.2 kg 1.3 kg 1.4 kg 1.4 kg 1.5 kg 1.3 kg PUZ-A18NHA 56 oz 58 oz 60 oz 62 oz 64 oz 66 oz 60 oz PUZ-A18NHA-BS PUY-A18NHA PUY-A18NHA 1.6 kg 1.6 kg...

  • Page 10: Noise Criterion Curves

    6-3. NOISE CRITERION CURVES PUY-A24/30/36NHA PUY-A12/18NHA PUY-A12/18NHA PUY-A24/30/36NHA SPL(dB) MODE LINE SPL(dB) MODE LINE PUY-A12/18NHA COOLING PUY-A24/30/36NHA COOLING PUZ-A18NHA HEATING HEATING PUZ-A24/30/36NHA PUZ-A18NHA-BS PUZ-A24/30/36NHA-BS NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF...

  • Page 11: Standard Operation Data

    Cycle 60Hz 60Hz 60Hz 60Hz 60Hz Voltage 230V 230V 230V 230V 230V Current 0.33A 0.43A 0.43A 0.52A 1.25A Outdoor unit model PUZ-A18NHA PUZ-A24NHA PUZ-A30NHA PUZ-A36NHA PUZ-A42NHA Phase Single Single Single Single Single Cycle 60Hz 60Hz 60Hz 60Hz 60Hz Voltage 230V...

  • Page 12: Cooling Only

    6-4-2. Cooling only Representative matching PKA-A12GA PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42AA Mode COOLING COOLING COOLING COOLING COOLING COOLING 12 , 000 18 , 000 24 , 000 30 , 000 34 , 200 42 , 000 Total Capacity BTU/h 1 , 210 2 , 240 2 , 650 4 , 400...

  • Page 13: Outlines And Dimensions

    OUTLINES AND DIMENSIONS OUTDOOR UNIT Unit : mm<inch> PUZ-A18NHA PUZ-A18NHA-BS PUY-A12/18NHA PUY-A12/18NHA PUY-A12/18NHA 400<15-25/32> 347.5<13-11/16> [33<1-5/16> drain hole Air intake Air intake 45.4<1-25/32> Air outlet 4-oval hole 40<1-9/16> Service panel 18<23/32> 23<29/32> 22<7/8> Service panel for charge plug 2-ø22.2<7/8> 1/2 conduit hole...
  • Page 14 PUZ-A24/30/36NHA PUZ-A24/30/36NHA-BS Unit : mm<inch> PUY-A24/30/36NHA PUY-A24/30/36NHA PUY-A24/30/36NHA...
  • Page 15 Unit : mm<inch> PUZ-A42NHA PUZ-A42NHA-BS PUY-A42NHA PUY-A42NHA-BS...

  • Page 16: Wiring Diagram

    WIRING DIAGRAM PUZ-A18NHA PUZ-A18NHA-BS PUY-A12/18NHA PUY-A12/18NHA PUY-A12/18NHA SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor> Power module SW10 Switch<Model Select> Motor for Compressor CB1~CB2 Main Smoothing Capacitor LED1, Light Emitting Diodes N.F. Noise Filter Circuit Board <Operation Inspection Indicators>...
  • Page 17 PUZ-A24NHA PUZ-A24NHA-BS PUY-A24NHA PUY-A24NHA PUY-A24NHA SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor> Converter SW10 Switch<Model Select> Motor for Compressor Power module LED1, Light Emitting Diodes Fan Motor CB1~CB3 Main Smoothing Capacitor LED2 <Operation Inspection Indicators> N.F. Noise Filter Circuit Board Fan Capacitor F1~4 Fuse<6.3 A>...
  • Page 18 PUZ-A30/36NHA PUZ-A30/36NHA-BS PUY-A30/36NHA PUY-A30/36NHA PUY-A30/36NHA SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor > P.B. Power Circuit Board Switch<Model Select> Motor for Compressor TABU/V/W Switch<Function Setup> Connection Terminal<U/V/W-Phase> Fan Motor TABS/T Connection Terminal<L1/L2-Phase> Switch Fan Capacitor TABP1/P2 Connection Terminal<DC Voltage> Switch 21S4 Solenoid Valve (Four-Way Valve)
  • Page 19 PUZ-A42NHA PUZ-A42NHA-BS PUY-A42NHA PUY-A42NHA-BS SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor > P.B. Power Circuit Board Switch<Model Select> Motor for Compressor TABU/V/W Switch<Function Setup> Connection Terminal<U/V/W-Phase> MF1,MF2 Fan Motors Switch TABS/T Connection Terminal<L1/L2-Phase> 21S4 Solenoid Valve (Four-Way Valve) TABP1/P2/P Connection Terminal<DC Voltage>...

  • Page 20: Wiring Specifications

    WIRING SPECIFICATIONS 9-1. 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 isolating switch C Outdoor unit D Indoor unit/outdoor unit connecting cords E Remote controller...
  • Page 21 9-2. M-NET WIRING METHOD (Points to notice) (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same conduit tube.
  • Page 22 M-NET wiring M-NET (1) Use 2-core x 1.25mm [AWG16] shield wire for electric wires. terminal Ground (Excluding the case connecting to system controller.) block wire (2) Connect the wire to the M-NET terminal block. Connect one core of the transmission wire (non-polar) to A terminal and the other to B. Peel the shield wire, twist the shield part to a string and connect it to S terminal.

  • Page 23: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PUZ-A18NHA PUZ-A18NHA-BS Unit : mm <4-way valve solenoid coil> High pressure Service Stop valve Heating : ON port(check) protect switch (with service port) Cooling : OFF 4-way valve Outdoor heat exchanger (#50) Refrigerant GAS pipe Strainer Thermistor 12.7A({1/2")
  • Page 24 PUY-A12/18NHA PUY-A12/18NHA PUY-A12/18NHA Unit : mm Service port Stop valve High pressure (Check) (with service port) protect switch Outdoor heat exchanger (#50) Thermistor Strainer Refrigerant GAS pipe (TH6) 12.7A({1/2") Thermistor (TH3) Distributor Thermistor (TH4) Accumulator Compressor (#100) (#100) Strainer Strainer Refrigerant LIQUID pipe 6.35A({1/4") Stop valve...
  • Page 25 1. Refrigerant collecting (pump down) Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1Turn on the power supply (circuit breaker). wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CENTRALLY CONTROLLED”...

  • Page 26: Troubleshooting

    TROUBLESHOOTING 11-1. 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 inferior phenomenon is reoccurring at service, are sum- marized in the table below.
  • Page 27 Operating procedures While the room temperature display on the remote "TEST RUN" and the currently selected controller is “PLEASE WAIT”, the remote controller is disabled. operation mode are displayed altemately. Wait until “PLEASE WAIT” disappears before using remote controller. 1. Turn on the main power supply. “PLEASE WAIT”...
  • Page 28 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 greater than 1.0M". TEST COOL 1 Turn on the main power to the unit. TEST RUN 2 Press the button twice continuously.

  • Page 29: How To Proceed "Self-Diagnosis

    11-3. HOW TO PROCEED "SELF-DIAGNOSIS" 11-3-1. 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 temperature display, and the error code and unit number are displayed alternately as shown below.

  • Page 30: Remote Controller Diagnosis

    When the error history is reset, the display will look like the one shown below. Press the ON/OFF button twice within 3 seconds. The self-diagnosis However, if you fail to reset the error history, the error content will be displayed again. address or refrigerant address will blink.
  • Page 31 11-3-4. Malfunction-diagnosis method by wireless remote controller <In case of trouble during operation> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] 1.
  • Page 32 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp blink pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.

  • Page 33: Self-Diagnosis Action Table

    11-4. 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 Meaning of error code and detection method Judgment and action Case 1 No voltage is supplied to terminal 1 Check following items.
  • Page 34 Error Code Meaning of error code and detection method Case Judgment and action 1 Disconnection or contact failure 1 Check connection of 63H connector on 63H connector open Abnormal if 63H connector circuit is open of 63H connector on outdoor outdoor controller circuit board.
  • Page 35 <Abnormalities detected while unit is operating> <Abnormalities detected while unit is operating> Error Code Meaning of error code and detection method Judgment and action Case 1 Short cycle of indoor unit 1~6Check indoor unit and repair the defect. Abnormal high pressure (High-pressure 2 Clogged filter of indoor unit switch 63H worked) Abnormal if high-pressure switch 63H...
  • Page 36 Error Code Meaning of error code and detection method Judgment and action Case Open/short circuit of discharge 1 Disconnection or contact 1 Check connection of connector (TH4) on the temperature thermistor (TH4) failure of connector (TH4) on outdoor controller circuit board. Check breaking of the lead wire for the outdoor controller circuit Abnormal if open (3: [37˚F] or less) or...
  • Page 37 Error Code Meaning of error code and detection method Case Judgment and action 1 Failure in the operation of 1 Check or replace the DC fan motor. Abnormality in the outdoor fan motor The outdoor fan motor is considered to be the DC fan motor abnormal if the rotational frequency of fan 2 Failure in the outdoor circuit...
  • Page 38 Error Code Meaning of error code and detection method Judgment and action Case Abnormal low pressure (63L worked) 1 Stop valve of outdoor unit is 1 Check stop valve. Abnormal if 63L is worked (under- closed during operation. 0.03MPa) during compressor operation. 2 Disconnection or loose connection 2~4 Turn the power off and on again to check 63L: Low-pressure switch...
  • Page 39 Error Code Meaning of error code and detection method Judgment and action Case Remote controller transmission 1 Set a remote controller to main, and the 1 2 remote controller are set as error(E3)/signal receiving error(E5) other to sub. 1 Abnormal if remote controller could not “main.”...
  • Page 40 Error Code Meaning of error code and detection method Judgment and action Case 1 Slight temperature difference Abnormality of pipe temperature Check pipe <liquid or condenser / <Cooling mode> between indoor room evaporator> temperature with room Detected as abnormal when the pipe tem- temperature and pipe <liquid temperature display on remote perature is not in the cooling range 3 min-...
  • Page 41 Error Code Meaning of error code and detection method Case Judgment and action 1 Data of transmission proces- Communication error with communica- Turn off the power supply of outdoor unit and tion processor sor or unit processor is not indoor unit and FRESH MASTER or LOSSNAY Defective communication between unit at the same time for 2 minutes or more, and transmitted normally because...
  • Page 42 From the previous page. Error Code Meaning of error code and detection method Case Judgment and action 4. If displayed address or attribute is 1 During group operation with Same as mentioned in “A7” of the previous remote controller, indoor unit of multi- refrigerant page.

  • Page 43: Troubleshooting By Inferior Phenomena

    Error Code Meaning of error code and detection method Case Judgment and action M-NET NO RESPONSE 1 Transmitting condition is 1 Check transmission waveform or noise on Abnormal if a message was transmitted repeated fault because of transmission wire. noise and the like. and there were reply (ACK) that message 2 Turn off the power supply of outdoor unit and 2 Extension of transmission wire...
  • Page 44 Phenomena Factor Countermeasure 1The pair number settings of the wireless remote 4. Even controlling by the wireless 1Check the pair number settings. remote controller no beep is heard controller and indoor controller board are mis- and the unit does not start operat- matched.
  • Page 45 Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller. Inspection method and Diagnosis flow Cause troubleshooting Check the display time of “PLEASE WAIT” after turning on the main power. 6 minutes 2 minutes or more or less How long is “PLEASE WAIT” •...

  • Page 46: Symptoms: Nothing Is Displayed On The Remote Controller

    LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 1 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit.
  • Page 47 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 2 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit.
  • Page 48 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 3 LED1 : LED2 : LED3 : — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. DC 10V to DC 16V? •...
  • Page 49 • Before repair Frequent calling from customers. Phone Calls From Customers How to Respond Note 1 The operating display of remote 1 Check if power is supplied to air conditioner. Unit does not operate controller does not come on. Nothing appears on the display unless power is at all.
  • Page 50 Phone Calls From Customers How to Respond Note 1 Check the set temperature of remote controller. The room cannot be cooled or heated sufficiently. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature.
  • Page 51 Phone Calls From Customers How to Respond Note 3 Air blows out for a while after Something 3 This is not a malfunction. However, this control is also is wrong HEAT operation is stopped. The blower is operating just for cooling down the applied to the models which with the heated-up air conditioner.
  • Page 52 Phone Calls From Customers How to Respond Note A white mist is expelled from the indoor unit. This is not a malfunction. This may occur when the operation gets started in the room of high humidity. Water or moisture is expelled from the outdoor Cooling;...
  • Page 53 11-6. HOW TO CHECK THE PARTS PUZ-A18/24/30/36/42NHA PUZ-A18/24/30/36/42NHA-BS PUY-A12/18/24/30/36/42NHA PUY-A12/18/24/30/36NHA PUY-A12/18/24/30/36NHA -BS PUY-A42NHA-BS Check points Parts name Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. <Outdoor pipe> (Ambient temperature 10:~30:, 50˚F~86˚F) Thermistor (TH4) Normal Abnormal <Discharge> 160k"~410k"...
  • Page 54 Check method of DC fan motor (fan motor / outdoor controller circuit board) Notes · 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, 2) for the motor with the power supply on. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
  • Page 55 11-7. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Outdoor pipe> (TH3) • Thermistor <Outdoor 2-phase pipe> (TH6) • Thermistor <Outdoor> (TH7) Thermistor R0 = 15k' ± 3% B constant = 3480 ± 2% =15exp{3480( 273+t – 273 )} t (:): R =15exp{3480( 273+(T–...
  • Page 56 Linear expansion valve (A12, 18) (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the indoor controller board and the linear expansion valve>...

  • Page 57: Linear Expansion Valve

    Linear expansion valve (A24, 30, 36, 42) (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the indoor controller board and the linear expansion valve>...
  • Page 58 (3) How to attach and detach the coil of linear expansion valve (A12, 18) <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Coil Lead wire Stopper <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.
  • Page 59 (4) How to attach and detach the coil of linear expansion valve (A24, 30, 36, 42) <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Stopper Coil Lead wire <How to detach the coil>...

  • Page 60: Emergency Operation

    11-8. 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 short-circuiting the connector (CN31) on outdoor controller board.
  • Page 61 (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 mode Operation data Remarks COOL HEAT Intake temperature (TH1) 27:, 81˚F 20.5:, 69˚F Indoor fluid pipe temperature (TH2)

  • Page 62: Noise

    11-9. TEST POINT DIAGRAM Outdoor controller circuit board PUZ-A18/24/30/36/42NHA PUZ-A18/24/30/36/42NHA-BS PUY-A12/18/24/30/36/42NHA PUY-A12/18/24/30/36NHA PUY-A12/18/24/30/36NHA PUY-A42NHA-BS <CAUTION> TEST POINT1 is high voltage. (TEST POINT 1) (TEST POINT 2) (Indoor/outdoor unit (voltage between pins of C5E) (voltage between pins of C6B): DC 15V High pressure switch connecting wire) Communication...
  • Page 63 Outdoor noise filter circuit board PUZ-A18NHA PUZ-A18NHA-BS PUY-A12/18NHA PUY-A12/18NHA PUY-A12/18NHA LI, NI Voltage of 208/230V AC is input. Connect to the earth (Connect to the terminal block(TB1)) CNAC1, CNAC2 208/230V AC (Connect to the Primary current outdoor controller (Connect to the...

  • Page 64: Noise

    Outdoor noise filter circuit board PUZ-A24NHA PUZ-A24NHA-BS PUY-A24NHA PUY-A24NHA PUY-A24NHA LI, NI Voltage of 208/230V AC is input. Connect to the earth (Connect to the terminal block(TB1)) CNAC1, CNAC2 208/230V AC (Connect to the outdoor controller circuit board (CNAC)) Primary current (Connect to the outdoor power circuit board...

  • Page 65: Noise

    Outdoor noise filter circuit board PUZ-A30/36/42NHA PUZ-A30/36/42NHA-BS PUY-A30/36/42NHA PUY-A42NHA-BS LO, NO Voltage of 208/230V AC is output PUY-A30/36NHA PUY-A30/36NHA (Connect to the outdoor power circuit board (TABS, TABT)) CNAC1, CNAC2 208/230V AC (Connect to the outdoor controller circuit board (CNAC)) Primary current (Connect to the outdoor power...

  • Page 66: Noise

    Brief check of DIP-IPM and DIP-PFC W Usually, they are in a state of being short-circuited if they are broken. Outdoor power circuit board Measure the resistance in the following points (connectors, etc.). If they PUZ-A18/24NHA are short-circuited, it means that they are broken. PUZ-A18/24NHA-BS 1.

  • Page 67: Noise

    Outdoor power circuit board Brief check of POWER MODULE W Usually, they are in a state of being short-circuited if they are broken. PUZ-A30/36/42NHA Measure the resistance in the following points (connectors, etc.). PUZ-A30/36/42NHA-BS If they are short-circuited, it means that they are broken. 1.

  • Page 68: Function Of Switches, Connectors And Jumpers

    11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches Type Action by the switch operation Function Effective timing Switch switch When compressor is working Forced defrost Start Normal in heating operation w Abnormal history clear Clear Normal Always 1 2 3 4 5 6 1 2 3 4 5 6...
  • Page 69 (2) Function of connectors and switches Action by open/ short operation Connector Types Function Effective timing Switch Short Open Connector CN31 Start When power supply ON Emergency operation Normal SW6-1 MODEL SW10 MODEL SW10 PUY-A12N PUZ-A18N SW6-2 1 2 3 4 5 6 1 2 3 4 5 6 SW6-3 PUY-A18N...

  • Page 70: Noise

    <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 CNM on outdoor controller board.
  • Page 71 Indication Error Outdoor controller board Error Detailed Contents Inspection method code reference LED1 (Green) LED2 (Red) page 1Check if stop valves are open. 3 blinking 1 blinking P.35 Abnormality of shell thermostat 2Check if connectors (TH4, LEV-A) on outdoor controller board are not and discharging temperature (TH4) disconnected.
  • Page 72 <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-Control Service Tool’. Operation indicator SW2 : Indicator change of self diagnosis SW2 setting...
  • Page 73 Display detail Explanation for display Unit SW2 setting Pipe temperature / Liquid(TH3) – 40~194 (– 40~90:) – 40~194 (When the coil thermistor detects 0˚F or below, “–” and temperature are displayed by turns.) ˚F (Example) When -10˚F; 2 3 4 5 6 0.5 secs.
  • Page 74 SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid(TH3) on error – 40~194 (– 40~90:) occurring (When the coil thermistor detects 0˚F or below, “–” – 40~194 and temperature are displayed by turns.) ˚F (Example) When –15˚F; 0.5 secs.
  • Page 75 SW2 setting Display detail Explanation for display Unit The number of connected indoor units (The number of connected indoor units are dis- played.) Unit 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code Capacity Code Capacity Code Code...
  • Page 76 SW2 setting Display detail Explanation for display Unit Indoor setting temperature 62~86 (17~30:) 62~86 ˚F 2 3 4 5 6 Outdoor pipe temperature / Cond./ -38~190 (-39~88:) Eva. (TH6) (When the temperature is 0˚F or less, “–” and -38~190 temperature are displayed by turns.) ˚F 2 3 4 5 6 Outdoor outside temperature (TH7)
  • Page 77 SW2 setting Display detail Explanation for display Unit 0~100 Capacity save (When the capacity is 100%, hundreds digit, tens 0~100 digit and ones digit are displayed by turns.) When air conditioner is connected to (Example) When 100%; M-NET and capacity save mode is 0.5 secs.
  • Page 78 SW2 setting Display detail Explanation for display Unit 0~480 LEV-A opening pulse on error occurring (When it is 100 pulse or more, hundreds digit, tens 0~480 digit and ones digit are displayed by turns.) (Example) When 130 pulse; Pulse 0.5 secs. 0.5secs.
  • Page 79 Explanation for display Unit SW2 setting Display detail 0~327 (0~182degC) Discharge superheat on error occurring (When the temperature is 100degF or more, hundreds digit, tens digit and ones digit are 0~327 displayed by turns.) degF (Example) When 150degF; Cooling = TH4-TH6 0.5 secs.
  • Page 80 SW2 setting Display detail Explanation for display Unit Controlling status of compressor The following code will be a help to know the operating frequency operating status of unit. • The tens digit Display Compressor operating frequency control Primary current control Secondary current control •...

  • Page 81: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 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, even for inverter models. Smooth Mainte- Discharge temperature 147˚F Conventional inspection work...
  • Page 82 Data measurement When the operation is stabilized, measure operation data as explained below. (4) Press the [TEMP] buttons ( ) to select the desired refrigerant address. [Screen (5) Select the type of data to be displayed. After selecting, go to step (6). Compressor information button MENU...
  • Page 83 12-2.GUIDE FOR OPERATION CONDITION Inspection item Result Check Points Breaker Good Retightened Enter the temperature differences between into Terminal block Outdoor Unit Good Retightened the graph given below. Indoor Unit Good Retightened Operation state is determined according to the plotted areas on (Insulation resistance) M"...

  • Page 84: Function Setting

    FUNCTION SETTING 13-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set according to necessity using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1. (1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.) <Table 1>...
  • Page 85 (2) Functions available when setting the unit number to 01-03 or AL (07 in case of wireless remote controller) • When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the indoor unit number.
  • Page 86 13-1-1. Selecting functions using the wired remote controller First, try to familiarize yourself with the flow of the function selection procedure. In this section, an example of setting the room temperature detection position is given. For actual operations, refer to steps 1 to 0 . Setting number Refrigerant address Unit number...
  • Page 87 [Operating Procedure] 1 Check the setting items provided by function selection. If settings for a mode are changed by function selection, the functions of that mode will be changed accordingly. Check all the current settings according to steps 2 to 7 , fill in the "Check" column in Table 1, then change them as necessary. For initial settings, refer to the indoor unit's installation manual. 2 Switch off the remote controller.
  • Page 88 13-1-2. Selecting functions using the wireless remote controller (Type C) Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] The flow of the function selection procedure is shown below.
  • Page 89 13-2. 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 Item 2 Item 3 (Setting content) 1.Change language Language setting to display •...
  • Page 90 [Function selection flowchart] Normal display Hold down the button and press the button for 2 seconds. (Display when the air conditioner is not running) Setting language (English) Press the operation mode button. Hold down the button and press the button for 2 seconds. Press theTIMER MENU button.
  • Page 91 13-3. Function selection of wireless remote controller TEMPERATURE DISPLAY : : /- - F SETTING (Change of temp mode from - - F to : : ) 1 Press the set button with something sharp at the end. MODEL SELECT blinks.

  • Page 92: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 14-1. HOW TO "MONITOR THE OPERATION DATA" • Turn on the [Monitoring the operation data] Example) Request code "004" Discharge temperature 156˚F Refrigerant address "00" A: Mode display B: Refrigerant address C: Data display area D: Request code display area button for 3 seconds so that [Maintenance mode] appears on the screen (at A).
  • Page 93 14-2. REQUEST CODE LIST * Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Description Request content Unit Remarks (Display range) Operation state Refer to 14-2-1. Detail Contents in Request Code. – Compressor-Operating current (rms) 0 –...
  • Page 94 Description Request content Unit Remarks (Display range) Indoor unit-Control state – Refer to 14-2-1.Detail Contents in Request Code. Outdoor unit-Control state – Refer to 14-2-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 14-2-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 14-2-1.Detail Contents in Request Code.
  • Page 95 Description Request content Unit Remarks (Display range) Error history 1 (latest) Displays error history. (" - - " is displayed if no history is present.) Code Error history 2 (second to last) Displays error history. (" - - " is displayed if no history is present.) Code Error history 3 (third to last) Displays error history.
  • Page 96 Description Request content Unit Remarks (Display range) Indoor-Fan operating time 0 – 9999 1 hour (After filter is reset) Indoor-Total operating time 0 – 9999 10 hours (Fan motor ON time) Indoor fan output value (Sj value) 0 – 255 Fan control data –...
  • Page 97 14-2-1. Detail Contents in Request Code Example) Request code "004" Discharge temperature 156˚F Refrigerant address "00" A: Mode display B: Refrigerant address C: Data display area D: Request code display area [Operation state] (Request code ": 0 ") Relay output state Power currently Data display Display...
  • Page 98 [Fan control state] (Request code :" 53 ") Data display Fan step correction value by heatsink temperature overheat prevention control Fan step correction value by cool condensation temperature overheat prevention control Display Correction value - (minus) – 1 [Actuator output state] (Request code :"54") Data display Actuator output state 1 Actuator output state 2...
  • Page 99 [Contact demand capacity] (Request code "61") Setting content Data display Setting Display Setting value Setting content SW7-1 SW7-2 100% [External input state] (Request code "62") Input state : Input present Data display Contact demand Silent mode Spare 1 Spare 2 Display Input state input...
  • Page 100 [Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82 0: Switch OFF 1: Switch ON 0: Switch OFF 1: Switch ON SW1, SW2, SW6, SW7 Data display Data display 00 00 00 00 00 01 00 01 00 02 00 02...
  • Page 101 [Indoor unit – Model setting information] (Request code : 162) Data display Display Model setting state Display Model setting state See the table on the right. PKA-A·GA(L) PKA-A·FA(L) PCA-A·GA, PLA-A·BA PLA-A·AA [Indoor unit – Capacity setting information] (Request code 163 ) Data display Display Capacity setting state...

  • Page 102: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUZ-A18NHA PUZ-A18NHA-BS OPERATING PROCEDURE PHOTOS Top panel 1. Removing the top panel, service panel, front panel and Photo 1 Top panel fixing screws 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.
  • Page 103 OPERATING PROCEDURE PHOTOS 3. Removing the electrical parts box Photo 5 (1) Remove the service panel. (See photo 1.) (2) Remove the top panel. (See photo 1.) (3) Remove the front panel. (See photo 1.) Controller circuit Electrical parts box board (C.B.) (4) Disconnect the indoor/outdoor connecting wire from terminal block.
  • Page 104 OPERATING PROCEDURE PHOTOS 5. Removing the thermistor <Outdoor> (TH7) Photo 7 Thermistor <Outdoor> (1) Remove the service panel. (See photo 1.) Electrical parts box (TH7) (2) Remove the top panel. (See photo 1.) (3) Disconnect the connector TH7 (red) on the controller circuit board in the electrical parts box.
  • Page 105 OPERATING PROCEDURE PHOTOS 8. Removing the four-way valve Photo 10 (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. (5) Remove the back panel.
  • Page 106 OPERATING PROCEDURE PHOTOS 12. Removing the compressor (MC) Photo 13 (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.
  • Page 107 PUZ-A30NHA PUZ-A30NHA-BS PUZ-A36NHA PUZ-A36NHA-BS OPERATING PROCEDURE PHOTOS & ILLUSTRATION Top panel fixing screws 1. Removing the service panel and top panel Figure 1 Top panel (1) Remove 3 service panel fixing screws (5 10) and slide the hook on the right downward to remove the service panel.
  • Page 108 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) Photo 4 Thermistor (1) Remove the service panel. (See figure 1.) <Outdoor 2-phase pipe> Electrical (2) Remove the top panel. (See figure 1.) Controller (TH6) parts box (3) Disconnect the connectors, TH6 and TH7 (red), on the circuit board controller circuit board in the electrical parts box.
  • Page 109 OPERATING PROCEDURE PHOTOS 7. Removing the solenoid valve coil <Four-way valve> (21S4), Photo 7 linear expansion valve coil (LEV-A) and solenoid valve coil <Bypass valve> (SV) (1) Remove the service panel. (See figure 1.) Four way valve coil (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box.
  • Page 110 OPERATING PROCEDURE PHOTOS 10. Removing the bypass valve Photo 9 (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.
  • Page 111 OPERATING PROCEDURE PHOTOS 13. Removing the compressor (MC) Photo 12 (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 10) and remove the front cover panel. (See figure 1.) (4) Remove 2 back cover panel fixing screws (5 10) and remove the back cover panel.
  • Page 112 PUZ-A42NHA PUZ-A42NHA-BS OPERATING PROCEDURE PHOTOS & ILLUSTRATION 1. Removing the service panel and top panel Top panel fixing screws Top panel Figure 1 (1) Remove 3 service panel fixing screws (5 10) and slide the hook on the right downward to remove the service Service panel panel.
  • Page 113 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) Photo 4 Thermistor (1) Remove the service panel. (See figure 1.) <Outdoor 2-phase pipe> Electrical (2) Remove the top panel. (See figure 1.) Controller parts box (TH6) circuit board (3) Disconnect the connectors, TH6 and TH7 (red), on the (C.B.) controller circuit board in the electrical parts box.
  • Page 114 OPERATING PROCEDURE PHOTOS 7. Removing the solenoid valve coil <Four-way valve> (21S4), and linear expansion valve coil (LEV-A) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) [Removing the solenoid valve coil <Four-way valve>] (3) Remove four-way valve solenoid coil fixing screw (4) Remove the solenoid valve coil <Four-way valve>...
  • Page 115 OPERATING PROCEDURE PHOTOS 10. Removing the high pressure switch (63H) and Photo 8 low pressure switch (63L) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 10) in the rear of the unit and remove the right side panel.
  • Page 116 OPERATING PROCEDURE PHOTOS 12. Removing the compressor (MC) Photo 10 (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 10) and remove the front cover panel. (See photo 3.) (4) Remove 2 back cover panel fixing screws (5 10) and Valve bed...

  • Page 117: Parts List

    PARTS LIST (non-RoHS compliant) STRUCTURAL PARTS PUZ-A18NHA PUY-A12NHA PUY-A18NHA ty/set Wiring Recom- PUZ, PUY-A Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Symbol GRILLE FRONT PANEL BASE ASSY T7W E00 617 CONDUIT PLATE T7W E03 667 SERVICE PANEL...
  • Page 118 STRUCTURAL PARTS PUZ-A24/30/36NHA PUY-A24/30/36NHA Part number that is circled is not shown in the figure. Q , ty/set Wiring Recom- Remarks PUZ, PUY-A Part No. Part Name Specification mended Diagram 24, 30, 36 (Drawing No.) Q , ty Symbol SIDE PANEL (L) T7W E02 691 FAN GRILLE T7W E01 667...
  • Page 119 STRUCTURAL PARTS PUZ-A42NHA PUY-A42NHA Part number that is circled is not shown in the figure. Q , ty/set Wiring Recom- PUZ, PUY-A Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Symbol T7W E02 662 SIDE PANEL (L) T7W E02 691 FAN GRILLE T7W E02 667 FRONT PANEL...
  • Page 120 FUNCTIONAL PARTS PUZ-A18NHA PUY-A12NHA PUY-A18NHA...
  • Page 121 Part numbers that are circled are not shown in the figure. Q , ty/set Remarks Wiring Recom- PUZ-A PUY-A Part No. Part Name Specification (Drawing No.) Diagram mended Q , ty Symbol FAN MOTOR PROPELLER FAN THERMISTOR (DISCHARGE) SNB130FPBM1 Including COMPRESSOR RUBBER MOUNT STRAINER...
  • Page 122 FUNCTIONAL PARTS PUZ-A24/30/36NHA PUY-A24/30/36NHA These figures show about PUZ-A30/36NHA.
  • Page 123 Part numbers that are circled are not shown in the figure. Q , ty/set Wiring Recom- PUZ-A PUY-A Remarks Part No. Part Name Specification Diagram mended 24 30, 36 30, 36 (Drawing No.) Q , ty Symbol T7W E28 763 FAN MOTOR PROPELLER FAN 21S4...
  • Page 124 FUNCTIONAL PARTS PUZ-A42NHA PUY-A42NHA...
  • Page 125 Part numbers that are circled are not shown in the figures. Q , ty/set Wiring Recom- PUZ-A PUY-A Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Q , ty Symbol FAN MOTOR MF1,2 PROPELLER FAN HEAT EXCHANGER 21S4 SOLENOID COIL <FOUR-WAY VALVE>...

  • Page 126: Rohs Parts List

    RoHS PARTS LIST (RoHS compliant) FUNCTIONAL PARTS PUZ-A18NHA PUZ-A18NHA-BS PUY-A12NHA PUY-A12NHA PUY-A18NHA PUY-A18NHA...
  • Page 127 Part numbers that are circled are not shown in the figure. Q , ty/set Wiring Recom- PUZ-A PUY-A Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Symbol (-BS) (-BS) R01 E47 221 FAN MOTOR R01 E07 115 PROPELLER FAN R01 E08 097 R01 E08 201 THERMISTOR (DISCHARGE)
  • Page 128 FUNCTIONAL PARTS PUZ-A24/30/36NHA PUZ-A24/30/36NHA-BS PUY-A24/30/36NHA PUY-A24/30/36NHA These figures show about PUZ-A30/36NHA(-BS).
  • Page 129 Part numbers that are circled are not shown in the figure. Q , ty/set Wiring Recom- PUZ-A PUY-A Remarks Part No. Part Name Specification Diagram mended 30, 36 Q , ty 30, 36 (Drawing No.) Symbol NHA(-BS) NHA (-BS) T7W E28 763 FAN MOTOR PROPELLER FAN T7W E20 242...
  • Page 130 FUNCTIONAL PARTS PUZ-A42NHA PUZ-A42NHA-BS PUY-A42NHA PUY-A42NHA-BS...
  • Page 131 Part numbers that are circled are not shown in the figures. Q , ty/set Wiring Recom- PUZ-A PUY-A Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Q , ty Symbol NHA,NHA-BS MF1,2 FAN MOTOR PROPELLER FAN T7W E38 408 HEAT EXCHANGER T7W E21 242 SOLENOID COIL <FOUR-WAY VALVE>...
  • Page 132 STRUCTURAL PARTS PUZ-A18NHA PUZ-A18NHA-BS PUY-A12NHA PUY-A12NHA PUY-A18NHA PUY-A18NHA ty/set Wiring Recom- Remarks PUZ-A·NHA(-BS) Part No. Part Name Specification Diagram mended (Drawing No.) PUY-A·NHA (-BS) Symbol R01 E30 691 GRILLE R01 E09 668 FRONT PANEL R01 E34 686 BASE ASSY T7W E00 617...
  • Page 133 STRUCTURAL PARTS PUZ-A24/30/36NHA(-BS) PUY-A24/30/36NHA (-BS) Part number that is circled is not shown in the figure. Q , ty/set Wiring Recom- Remarks PUZ-A·NHA(-BS) Part No. Part Name Specification Diagram mended (Drawing No.) PUY-A·NHA (-BS) Symbol 24, 30, 36 SIDE PANEL (L) T7W E03 691 FAN GRILLE T7W E05 667...
  • Page 134 STRUCTURAL PARTS PUZ-A42NHA PUZ-A42NHA-BS PUY-A42NHA PUY-A42NHA-BS Part number that is circled is not shown in the figure. Q , ty/set Wiring Recom- PUZ, PUY-A Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Symbol NHA, NHA-BS T7W E03 662 SIDE PANEL (L) T7W E03 691 FAN GRILLE...
  • Page 136 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Jun. 2007 No.OC367 REVISED EDITION-C PDF 9 Distributed in Nov. 2006 No.OC367 REVISED EDITION-B PDF 9 Distributed in Aug. 2006 No.OC367 REVISED EDITION-A PDF 9 New publication, effective Jun.

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