Mitsubishi Electric Mr.Slim PUZ-A18NHA4R1 Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SPLIT-TYPE, AIR CONDITIONERS

Outdoor unit

SERVICE MANUAL

[Model names]

[Service Ref.]

PUZ-A18NHA4

PUZ-A24NHA4

PUZ-A30NHA4

PUZ-A36NHA4

PUZ-A42NHA4

PUZ-A18NHA4-BS

PUZ-A24NHA4-BS

PUZ-A30NHA4-BS

PUZ-A36NHA4-BS

PUZ-A42NHA4-BS

PUY-A12NHA4

PUY-A18NHA4

PUY-A24NHA4

PUY-A30NHA4

PUY-A36NHA4

PUY-A42NHA4

PUY-A12NHA4-BS

PUY-A18NHA4-BS

PUY-A24NHA4-BS

PUY-A30NHA4-BS

PUY-A36NHA4-BS

PUY-A42NHA4-BS

PUY-A12NHA4R1

PUY-A18NHA4R1

PUZ-A24/30/36NHA4

PUY-A24/30/36NHA4

R410A

PUZ-A18NHA4R1

PUZ-A18NHA4R1-BS

PUY-A12NHA4R1-BS

PUY-A18NHA4R1-BS

CONTENTS

1. REFERENCE MANUAL ································· 2

2. SAFETY PRECAUTION ································· 2

3. FEATURES ····················································· 6

4. SPECIFICATIONS ·········································· 7

5. DATA ······························································· 9

6. OUTLINES AND DIMENSIONS ··················· 13

7. WIRING DIAGRAM ······································ 16

8. WIRING SPECIFICATIONS ·························· 20

9. REFRIGERANT SYSTEM DIAGRAM ············· 25

10. TROUBLESHOOTING ·································· 28

11. EASY MAINTENANCE FUNCTION·············· 85

12. FUNCTION SETTING ··································· 88

13. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ·····96

14. DISASSEMBLY PROCEDURE ··················· 106

PARTS CATALOG (OCB481)

July 2012

No.OCH481

REVISED EDITION-C

Revision:

• PUZ-A18NHA4R1(-BS), PUY-

A12/18NHA4R1(-BS) have

been added in REVISED

EDITION-C.

• Some descriptions have been

modified.

• Please void OCH481

REVISED EDITION-B.

Note:

• This manual describes only

service data of the outdoor

units.

• RoHS compliant products have

<G> mark on the spec name

plate.

Table of Contents

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Summary of Contents for Mitsubishi Electric Mr.Slim PUZ-A18NHA4R1

Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS Outdoor unit July 2012 No.OCH481 SERVICE MANUAL R410A REVISED EDITION-C [Model names] [Service Ref.] PUZ-A18NHA4 PUZ-A18NHA4 PUZ-A18NHA4R1 Revision: PUZ-A24NHA4 PUZ-A24NHA4 • PUZ-A18NHA4R1(-BS), PUY- PUZ-A30NHA4 PUZ-A30NHA4 A12/18NHA4R1(-BS) have PUZ-A36NHA4 been added in REVISED PUZ-A36NHA4 EDITION-C.
Page 2: Reference Manual
TECHNICAL CHANGES PUZ-A18NHA4 PUZ-A18NHA4R1 PUZ-A18NHA4-BS PUZ-A18NHA4R1-BS PUY-A12NHA4 PUY-A12NHA4R1 PUY-A12NHA4-BS PUY-A12NHA4R1-BS PUY-A18NHA4 PUY-A18NHA4R1 PUY-A18NHA4-BS PUY-A18NHA4R1-BS • Heat exchanger has been changed. REFERENCE MANUAL INDOOR UNIT Model name Service Ref. Service manual No. PLA-A12/18/24/30/36/42BA4 PLA-A12/18/24/30/36/42BA4 OCH482 OCB482 PCA-A24/30/36/42KA4 PCA-A24/30/36/42KA4 OCH484 OCB484 PCA-A24/30/36KA4 PCA-A24/30/36KA4.TH OCH501 PCA-A42KA5...
Page 3 3-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve. In case of using the existing pipes for R22, be careful with Vacuum pump oil may flow back into refrigerant cycle and the followings.
Page 4 [1] Cautions for service (1) Perform service after recovering 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 times higher than that of R22, their sizes of flared sections and flare nuts are different.
Page 6: Features
FEATURES PUZ-A18NHA4(R1) PUZ-A24/30/36NHA4 PUZ-A18NHA4(R1)-BS PUZ-A24/30/36NHA4-BS PUY-A12/18NHA4(R1) PUY-A24/30/36NHA4 PUY-A12/18NHA4(R1)-BS PUY-A24/30/36NHA4-BS PUZ-A42NHA4 PUZ-A42NHA4-BS PUY-A42NHA4 PUY-A42NHA4-BS CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max. 100ft, 30m (A42) / Max. 70ft, 21m (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-A18NHA4(R1) PUZ-A24NHA4 PUZ-A30NHA4 PUZ-A36NHA4 PUZ-A42NHA4 PUZ-A18NHA4(R1)-BS PUZ-A24NHA4-BS PUZ-A30NHA4-BS PUZ-A36NHA4-BS PUZ-A42NHA4-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 Compressor Hermetic Model...
Page 8 Service Ref. PUY-A12NHA4(R1) PUY-A18NHA4(R1) PUY-A24NHA4 PUY-A30NHA4 PUY-A36NHA4 PUY-A42NHA4 PUY-A12NHA4(R1)-BS PUY-A18NHA4(R1)-BS PUY-A24NHA4-BS PUY-A30NHA4-BS PUY-A36NHA4-BS PUY-A42NHA4-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 Crankcase heater Compressor Hermetic Model SNB130FQCM1...
Page 9: Data
DATA 6-1. REFILLING REFRIGERANT CHARGE (R410A : oz, kg) Piping Length ( one way ) Factory Service Ref. 50ft 60ft 70ft 80ft 90ft 100ft 110ft 120ft 130ft 140ft 150ft 160ft 165ft Charged 42 oz 44 oz 46 oz 48 oz 50 oz 52 oz 46 oz...
Page 10 6-3. NOISE CRITERION CURVES PUY-A12NHA4(R1) PUY-A18NHA4(R1) PUY-A18NHA4(R1)-BS PUY-A12NHA4(R1)-BS SPL(dB) SPL(dB) MODE LINE MODE LINE PUZ-A18NHA4(R1) COOLING COOLING PUZ-A18NHA4(R1)-BS HEATING 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 HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS...
Page 11 6-4. STANDARD OPERATION DATA 6-4-1. Heat pump Representative matching PKA-A18HA4 PKA-A24KA4 PKA-A30KA4 PKA-A36KA4 PLA-A42BA4 Mode COOLING HEATING COOLING HEATING COOLING HEATING COOLING HEATING COOLING HEATING 18 , 000 19 , 000 24 , 000 26 , 000 30 , 000 32 , 000 34 , 200 37 , 000...
Page 12 6-4-2. Cooling only Representative matching PKA-A12HA4 PKA-A18HA4 PKA-A24KA4 PKA-A30KA4 PKA-A36KA4 PLA-A42BA4 Mode COOLING COOLING COOLING COOLING COOLING COOLING Total Capacity BTU/h 12 , 000 18 , 000 24 , 000 30 , 000 34 , 200 42 , 000 Input 4 , 600 1,190 2,240...
Page 13: Outlines And Dimensions
OUTLINES AND DIMENSIONS OUTDOOR UNIT Unit: mm<inch> PUZ-A18NHA4 PUZ-A18NHA4-BS PUY-A12/18NHA4 PUY-A12/18NHA4-BS PUZ-A18NHA4R1 PUZ-A18NHA4R1-BS PUY-A12/18NHA4R1 PUY-A12/18NHA4R1-BS 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 discharge 4-oval hole 40<1-9/16> Service panel 18<23/32> 23<29/32> 22<7/8> Service panel for charge plug 2- 22.2<7/8>...
Page 14 PUZ-A24/30/36NHA4 PUZ-A24/30/36NHA4-BS Unit: mm<inch> PUY-A24/30/36NHA4 PUY-A24/30/36NHA4-BS OCH481C...
Page 15 PUZ-A42NHA4 PUZ-A42NHA4-BS Unit: mm<inch> PUY-A42NHA4 PUY-A42NHA4-BS OCH481C...
Page 16: Wiring Diagram
WIRING DIAGRAM PUZ-A18NHA4 PUZ-A18NHA4-BS PUY-A12/18NHA4 PUY-A12/18NHA4-BS PUZ-A18NHA4R1 PUZ-A18NHA4R1-BS PUY-A12/18NHA4R1 PUY-A12/18NHA4R1-BS [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor> Converter Switch Motor for Compressor Power Module LED1,LED2 LED<Operation Inspection Indicators> Fan Motor CB1~CB3 Main Smoothing Capacitor F1~F4 Fuse<T6.3AL250V> 21S4 Solenoid Valve (Four-Way Valve) N.F.
Page 17 PUZ-A24NHA4 PUZ-A24NHA4-BS PUY-A24NHA4 PUY-A24NHA4-BS [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor> Converter LED1,LED2 LED<Operation Inspection Indicators> Power Module Motor for Compressor F1~F4 Fuse<T6.3AL250V> Fan Motor CB1~CB3 Main Smoothing Capacitor Switch<Pump Down> Noise Filter Circuit Board 21S4 Solenoid Valve (Four-Way Valve) N.F.
Page 18 PUZ-A30/36NHA4 PUZ-A30/36NHA4-BS PUY-A30/36NHA4 PUY-A30/36NHA4-BS [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor> P.B. Power Circuit Board Switch<Test Operation> Motor for Compressor TABU/V/W Switch<Function Switch> Connection Terminal<U/V/W-Phase> Fan Motor TABS/T Switch<Model Select> Connection Terminal<L1/L2-Phase> 21S4 Solenoid Valve (Four-Way Valve) Switch<Function Setup>...
Page 19 PUZ-A42NHA4 PUZ-A42NHA4-BS PUY-A42NHA4 PUY-A42NHA4-BS [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor > P.B. Power Circuit Board Switch<Test Operation> Motor for Compressor TABU/V/W Connection Terminal<U/V/W-Phase> Switch<Function Switch> MF1,MF2 Fan Motor TABS/T Connection Terminal<L1/L2-Phase> Switch<Model Select> 21S4 Solenoid Valve (Four-Way Valve) Switch<Function Setup>...
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 Outdoor unit power supply Wiring circuit breaker or isolating switch Outdoor unit Indoor unit/outdoor unit connecting cords Remote controller...
Page 21 9-2. 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 * The optional indoor power supply terminal kit is required. Outdoor unit power supply Wiring circuit breaker or isolating switch Outdoor unit Indoor unit/outdoor unit connecting cords Remote controller...
Page 22 9-3. INDOOR - OUTDOOR CONNECTING CABLE Wire No. Size Outdoor power supply Max. 45m, 147ft Max. 50m, 164ft Max. 80m, 262ft Indoor unit-Outdoor unit AWG16(polar) AWG13(polar) AWG13(polar) and S3 separated The max. cable length may vary depending on the condition of installation, humidity or materials, etc. Wire No.
Page 23 9-4. M-NET WIRING METHOD (Points to note) (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 5 cm. Do not put them in the same conduit tube.
Page 24 ● M-NET wiring M-NET (1) Use 2-core × 1.25mm² [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.
Page 25: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PUZ-A18NHA4(-BS) PUZ-A18NHA4R1(-BS) Unit: mm (inch) <4-way valve solenoid coil> Service High pressure 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 12.7 ( 1/2) (TH6) Muffler...
Page 26 PUY-A12NHA4(-BS) PUY-A18NHA4(-BS) Unit: mm (inch) PUY-A12NHA4R1(-BS) PUY-A18NHA4R1(-BS) Service port Stop valve High pressure (Check) (with service port) protect switch Outdoor heat exchanger (#50) Thermistor Strainer Refrigerant GAS pipe (TH6) 12.7 ( 1/2) Thermistor (TH3) Thermistor (TH32) Distributor Accumulator Refrigerant flow in cooling Compressor (#100) (#100)
Page 27 1. Refrigerant collecting (pump down) Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1 Supply power (circuit breaker). * When power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CENTRALLY CONTROLLED”...
Page 28: 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 trouble is reoccurring at service, are summarized in the table below.
Page 29 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 alternately. Wait until “PLEASE WAIT” disappears before using remote controller. 1. Turn on the main power supply. “PLEASE WAIT”...
Page 30 Test run [for IR 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 31 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 32 When the error history is reset, the display will look like the one shown below. Press the button twice within 3 seconds. The self-diagnosis ON/OFF However, if you fail to reset the error history, the error content will be displayed again. address or refrigerant address will blink.
Page 33 11-3-4. Malfunction-diagnosis method by IR 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 34 • 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 35 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. Abnormal point and detection method Judgment and action Error Code Case 1 No voltage is supplied to terminal 1 Check following items.
Page 36 Case Error Code Abnormal point and detection method Judgment and action 63H connector open 1 Disconnection or contact failure 1 Check connection of 63H connector on Abnormal if 63H connector circuit is open for of 63H connector on outdoor outdoor controller circuit board. 3 minutes continuously after power supply.
Page 37 <Abnormalities detected while unit is operating> Abnormal point and detection method Judgment and action Error Code Case 1 Short cycle of indoor unit 1~6 Check indoor unit and repair the defect. High pressure (High-pressure switch 2 Clogged filter of indoor unit 63H operated) 3 Decreased airflow caused by Abnormal if high-pressure switch 63H oper-...
Page 38 Abnormal point and detection method Case Judgment and action Error Code 1 Disconnection or contact failure 1 Check connection of connector (TH4/TH32) Open/short circuit of discharge on the outdoor controller circuit board. temperature thermistor (TH4)/ of connector (TH4/TH32) on Check breaking of the lead wire for comp.shell thermistor (TH32) the outdoor controller circuit thermistor (TH4/TH32).
Page 39 Abnormal point and detection method Judgment and action Error Code Case 1 Failure in the operation of the 1 Check or replace the DC fan motor. Outdoor fan motor Abnormal if the rotational frequency of fan DC fan motor 2 Failure in the outdoor circuit 2 Check the voltage of the outdoor circuit con- motor is not detected during DC fan motor operation.
Page 40 Abnormal point and detection method Judgment and action Error Code Case 1 Stop valve of outdoor unit is 1 Open stop valve. Compressor overcurrent interruption 2 Check facility of power supply. Abnormal if overcurrent DC bus or com- closed. 2 Decrease of power supply 3 Correct the wiring (U·V·W phase) to pressor is detected after compressor starts operating for 30 seconds.
Page 41 Abnormal point and detection method Judgment and action Error Code Case w Check LED display on outdoor controller Indoor/outdoor unit communication circuit board. (Connect A-Control service tool error (Signal receiving error) 1 Abnormal if indoor controller board could (PAC-SG50ST)) 1 Contact failure, short circuit or not receive any signal normally for 6 Refer to EA~EC item if LED displays EA~AC.
Page 42 Abnormal point and detection method Judgment and action Error Code Case 1 Slight temperature difference 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- or condenser/evaporator>...
Page 43 Error Code Abnormal point 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 sor or unit processor is not indoor unit and FRESH MASTER or LOSSNAY tion processor transmitted normally because at the same time for 2 minutes or more, and...
Page 44 From the previous page. Error Code Abnormal point 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 indoor unit of multi- refrigerant page.
Page 45 Error Code Abnormal point and detection method Case Judgment and action 1 Transmitting condition is 1 Check transmission waveform or noise on M-NET NO RESPONSE Abnormal if a message was transmitted repeated fault because of transmission wire. noise and the like. 2 Turn off the power supply of outdoor unit and there were reply (ACK) that message 2 Extension of transmission wire...
Page 46 Phenomena Factor Countermeasure 1 The pair number settings of the IR wireless 4. Even controlling by the IR wireless 1 Check the pair number settings. remote controller no beep is heard remote controller and indoor controller board are and the unit does not start operat- mismatched.
Page 47 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 48 LED display of the indoor controller board LED1 : Symptoms: Nothing is displayed on the remote controller 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. AC 187V to AC 253V? Check the voltage among L1 and L2 on the terminal block (TB1) of the...
Page 49 LED display of the indoor controller board LED1 : Symptoms: Nothing is displayed on the remote controller 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 50 LED display of the indoor controller board LED1 : Symptoms: Nothing is displayed on the remote controller 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 51 • Before repair Frequent calling from customers Phone Calls From Customers How to Respond Note Unit does The operating display of remote Check if power is supplied to air conditioner. not operate controller does not come on. Nothing appears on the display unless power is at all.
Page 52 Phone Calls From Customers How to Respond Note The room cannot be cooled or heated sufficiently. Check the set temperature of remote controller. 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 53 Phone Calls From Customers How to Respond Note Something Air blows out for a while after However, this control is also This is not a malfunction. 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 54 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: when pipes or piping joints are cooled, they unt.
Page 55 11-6. HOW TO CHECK THE PARTS PUZ-A18/24/30/36/42NHA4 PUZ-A18/24/30/36/42NHA4-BS PUY-A12/18/24/30/36/42NHA4 PUY-A12/18/24/30/36/42NHA4-BS PUZ-A18NHA4R1 PUZ-A18NHA4R1-BS PUY-A12/18NHA4R1 PUY-A12/18NHA4R1-BS Check points Parts name Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. <Outdoor pipe> (At the ambient temperature 10 ~30 , 50°F~86°F) Thermistor (TH4) Normal Abnormal...
Page 56 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. Pay 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 57 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 58 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 outdoor controller board and the linear expansion valve>...
Page 59 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 outdoor controller board and the linear expansion valve>...
Page 60 (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>...
Page 61 (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 62 11-8. EMERGENCY OPERATION (1) When the error codes shown below are displayed on outdoor unit or microprocessor 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 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 mode Operation data Remarks COOL HEAT Intake temperature (TH1) 27:, 81°F 20.5:, 69°F Indoor ﬂ...
Page 64 11-9. TEST POINT DIAGRAM <CAUTION> TEST POINT1 is high voltage. Outdoor controller circuit board PUZ-A18/24/30/36/42NHA4 PUZ-A18/24/30/36/42NHA4-BS PUY-A12/18/24/30/36/42NHA4 PUY-A12/18/24/30/36/42NHA4-BS PUZ-A18NHA4R1 PUY-A12/18NHA4R1 PUZ-A18NHA4R1-BS PUY-A12/18NHA4R1-BS CN51 Forced defrost, detect history record reset, refrigerant address Demand control setting External signal output • Compressor operating signal Model select •...
Page 65 Outdoor noise filter circuit board PUZ-A18NHA4 PUZ-A18NHA4-BS PUY-A12/18NHA4 PUY-A12/18NHA4-BS PUZ-A18NHA4R1 PUZ-A18NHA4R1-BS PUY-A12/18NHA4R1 PUY-A12/18NHA4R1-BS LI, NI Voltage of 208/230V AC is input. Connect to the earth (Connect to the terminal block (TB1)) Connect to the earth Connect to the earth CNAC1, CNAC2 208/230V AC (Connect to the Primary current...
Page 66 Outdoor noise filter circuit board PUZ-A24NHA4 PUZ-A24NHA4-BS PUY-A24NHA4 PUY-A24NHA4-BS EI, E2 Connect to the earth CNAC1, CNAC2 Connect to 208/230V AC the earth (Connect to the outdoor control- ler circuit board (CNAC)) Primary current (Connect to the outdoor power circuit board (CN5)) CN52C 52C relay signal...
Page 67 Outdoor noise filter circuit board PUZ-A30/36/42NHA4 PUZ-A30/36/42NHA4-BS PUY-A30/36/42NHA4 PUY-A30/36/42NHA4-BS CN52C 52C driving signal (Connect to the outdoor controller circuit board (CN52C)) LO, NO Voltage of 208/230V AC is output (Connect to the outdoor power circuit board (TABS, TABT)) CNAC1, CNAC2 208/230V AC (Connect to the outdoor control-...
Page 68 Brief check of DIP-IPM and DIP-PFC Outdoor power circuit board W Usually, they are in a state of being short-circuited if they are broken. PUZ-A18NHA4 Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken. PUZ-A18NHA4-BS 1.
Page 69 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-A30/36/42NHA4 Measure the resistance in the following points (connectors, etc.). PUZ-A30/36/42NHA4-BS If they are short-circuited, it means that they are broken. 1.
Page 70 Active filter module PUZ-A30/36/42NHA4 PUZ-A30/36/42NHA4-BS PUY-A30/36/42NHA4 PUY-A30/36/42NHA4-BS Connect to the outdoor power circuit board (TABP2) L1, L2 Connect to the DCL (Reactor) Non-connect Lower side Upper side Non-connect Connect to the outdoor power circuit board (TABP1) Connect to the outdoor power circuit board (CNAF) –...
Page 71 11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches ■ The black square ( ) indicates a switch position. Type Action by the switch operation Function Effective timing Switch switch When compressor is operating Forced defrost 1 Start Normal in heating operation.
Page 72 Action by the switch operation Type of Switch Function Effective timing Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery 2 No function — — — 3,4,5 Model select Following SW5-6 reference Power consumption SW7-1 SW7-2...
Page 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 or on-off switch contactor setting to the CNDM connector which is optional contactor for demand input located on the outdoor controller board enables to control compressor operation frequency.
Page 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 CNM on outdoor controller board.
Page 75 Indication Error Outdoor controller board Error Detailed Contents Inspection method code reference LED1 (Green) LED2 (Red) page 3 blinking 1 blinking Check if stop valves are open. P.37 Abnormality of shell thermistor (TH32) Check if connectors (TH4, TH32, LEV-A) on outdoor controller board are not and discharging temperature (TH4) disconnected.
Page 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-Control Service Tool’. ■...
Page 77 ■ The black square ( ) indicates a switch position. 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;...
Page 78 ■ The black square ( ) indicates a switch position. Explanation for display Unit SW2 setting Display detail 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;...
Page 79 ■ The black square ( ) indicates a switch position. Explanation for display SW2 setting Display detail 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...
Page 80 ■ The black square ( ) indicates a switch position. Explanation for display Unit SW2 setting Display detail Indoor setting temperature 62~86 (17~30:) 62~86 ˚F 2 3 4 5 6 Outdoor pipe temperature / 2-phase -38~190 (-39~88:) pipe (TH6) (When the temperature is 0˚F or less, “–” and -38~190 temperature are displayed by turns.) ˚F...
Page 81 ■ The black square ( ) indicates a switch position. Explanation for display Unit SW2 setting Display detail 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%;...
Page 82 ■ The black square ( ) indicates a switch position. Explanation for display Unit SW2 setting Display detail 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;...
Page 83 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 32~360 (0~182˚C) Discharge superheat on error occurring (When the temperature is 100˚F or more, hundreds digit, tens digit and ones digit are 32~360 displayed by turns.) ˚F...
Page 84 ■ The black square ( ) indicates a switch position. Explanation for display Unit SW2 setting Display detail 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 85: 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 86 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 87 12-2.GUIDE FOR OPERATION CONDITION Check Points Inspection item Result 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) the graph.
Page 88: 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 89 (2) Functions available when setting the unit number to 01-03 or AL (07 in case of IR 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 90 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 Setting number Refrigerant address Unit number...
Page 91 [Operating Procedure] 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 , fill in the "Check" column in Table 1, then change them as necessary. For initial settings, refer to the indoor unit's installation manual. Switch off the remote controller.
Page 92 13-1-2. Selecting functions using the IR wireless remote controller (Type C) Functions can be selected with the IR wireless remote controller. Function selection using IR wireless remote controller is available only for refrigerant system with wireless function. Refrigerant address cannot be specified by the IR wireless remote controller. [Flow of function selection procedure] The flow of the function selection procedure is shown below.
Page 93 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 94 [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 95 13-3. Function selection of IR wireless remote controller TEMPERATURE DISPLAY °C/°F SETTING (Change of temp mode from °F to °C) 1 Press the set button with something sharp at the end. MODEL SELECT blinks. AUTO START 2 Press the button. “F:” blinks. 3 Press the button.
Page 96: 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 (1) Press the button for 3 seconds so that [Maintenance mode] appears on the screen (at...
Page 97 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 13-2-1. Detail Contents in Request Code. – Compressor-Operating current (rms) 0 –...
Page 98 Description Request content Unit Remarks (Display range) Indoor unit-Control state – Refer to 13-2-1.Detail Contents in Request Code. Outdoor unit-Control state – Refer to 13-2-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 13-2-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 13-2-1.Detail Contents in Request Code.
Page 99 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 100 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 101 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 102 [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 Actuator output state...
Page 103 [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...
Page 104 [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...
Page 105 [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 PEA-A·AA PCA-A·KA PKA-A·HA(L)/KA(L) [Indoor unit – Capacity setting information] (Request code : 163) Data display Display Capacity setting state...
Page 106: Disassembly Procedure
DISASSEMBLY PROCEDURE PUZ-A18NHA4 PUZ-A18NHA4-BS PUY-A12/18NHA4 PUY-A12/18NHA4-BS PUZ-A18NHA4R1 PUZ-A18NHA4R1-BS PUY-A12/18NHA4R1 PUY-A12/18NHA4R1-BS PHOTOS OPERATING PROCEDURE 1. Removing the top panel, service panel, front panel and Photo 1 Top panel Top panel back panel fixing screw (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 107 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) Electrical parts box Controller circuit board (C.B.) (3) Remove the front panel. (See Photo 1) (4) Disconnect the indoor/outdoor connecting wire from terminal block.
Page 108 OPERATING PROCEDURE PHOTOS 5. Removing the thermistor <Outdoor> (TH7) Photo 7 (1) Remove the service panel. (See Photo 1) Thermistor <Outdoor> (2) Remove the top panel. (See Photo 1) Electrical parts box (TH7) (3) Disconnect the connector TH7 (red) on the controller circuit board in the electrical parts box.
Page 109 OPERATING PROCEDURE PHOTOS 8. Removing the 4-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. (See Photo 2) (5) Remove the back panel.
Page 110 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 111 PUZ-A24/30/36NHA4(-BS) PUY-A24/30/36NHA4(-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 × 12) and slide the hook on the right downward to remove the service panel.
Page 112 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) Photo 4 (1) Remove the service panel. (See Figure 1) Thermistor Electrical Controller (2) Remove the top panel. (See Figure 1) <Outdoor 2-phase pipe> parts box circuit board (TH6) (3) Disconnect the connectors, TH6 and TH7 (red), on the (C.B.) controller circuit board in the electrical parts box.
Page 113 OPERATING PROCEDURE PHOTOS 8. Removing the 4-way valve coil (21S4), linear expansion Photo 8 valve coil (LEV-A) and bypass valve coil (SV) (1) Remove the service panel. (See Figure 1) 4-way valve coil (2) Remove the top panel. (See Figure 1) (3) Remove the electrical parts box.
Page 114 OPERATING PROCEDURE PHOTOS 11. Removing the bypass valve Photo 10 (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 × 12) in the rear of the unit and remove the right side panel.
Page 115 OPERATING PROCEDURE PHOTOS 14. Removing the reactor (DCL) (A30, 36) Photo 13 Reactor fixing screws (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 4 reactor fixing screws (4 ×...
Page 116 PUZ-A42NHA4(-BS) PUY-A42NHA4(-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 × 12) and slide the hook on the right downward to remove the service Service panel panel.
Page 117 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 (C.B.) controller circuit board in the electrical parts box.
Page 118 OPERATING PROCEDURE PHOTOS 7. Removing the 4-way valve coil (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 4-way valve coil] (3) Remove 4-way valve coil fixing screw (M4 × 6). (4) Remove the 4-way valve coil by sliding the coil toward you.
Page 119 OPERATING PROCEDURE PHOTOS 10. Removing the high pressure switch (63H) and low Photo 8 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 × 12) in the rear of the unit and remove the right side panel.
Page 120 (MC) fixing screws HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2010 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Jul. 2012 No.OCH481 REVISED EDITION-C Distributed in Mar. 2012 No.OCH481 REVISED EDITION-B New publication, effective Jul. 2012 Distributed in Oct.
Page 121 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS March 2014 No.OCB481 PARTS CATALOG R410A REVISED EDITION-B Outdoor unit [Service Ref.] [Model Names] Revision: PUZ-A18NHA4 PUZ-A18NHA4R1 PUZ-A18NHA4 • Modified the parts list table PUZ-A24NHA4 PUZ-A24NHA4 in page 8 in REVISED PUZ-A30NHA4 PUZ-A30NHA4 EDITION-B. PUZ-A36NHA4 PUZ-A36NHA4 • U pdated some parts numbers PUZ-A42NHA4 PUZ-A42NHA4 to the latest.
Page 122 RoHS PARTS LIST FUNCTIONAL AND ELECTRICAL PARTS PUZ-A18NHA4 PUZ-A18NHA4-BS PUZ-A18NHA4R1-BS PUZ-A18NHA4R1 PUY-A12NHA4 PUY-A12NHA4-BS PUY-A12NHA4R1-BS PUY-A12NHA4R1 PUY-A18NHA4 PUY-A18NHA4-BS PUY-A18NHA4R1-BS PUY-A18NHA4R1 OCB481B...
Page 123 RoHS PARTS LIST Parts number that is circled is not shown in the figure. Q'ty/unit Wiring Parts No. Parts Name Specification Diagram Symbol 1 G R01 E52 221 FAN MOTOR 2 G R01 E07 115 PROPELLER FAN 3 G R01 E08 097 NUT SNB130FQCM1 4 G T92 577 280 COMPRESSOR Including RUBBER MOUNT 5 G T7W E10 201 THERMISTOR(SHELL)
Page 124 RoHS PARTS LIST FUNCTIONAL PARTS PUZ-A24NHA4 PUY-A24NHA4 PUZ-A24NHA4-BS PUY-A24NHA4-BS PUZ-A30NHA4 PUY-A30NHA4 PUZ-A30NHA4-BS PUY-A30NHA4-BS PUZ-A36NHA4 PUY-A36NHA4 PUZ-A36NHA4-BS PUY-A36NHA4-BS A30/36 OCB481B...
Page 125 RoHS PARTS LIST Parts numbers that are circled are not shown in the figure. Q'ty/unit Wiring Parts No. Parts Name Specification Diagram Symbol 1 G T7W E27 763 FAN MOTOR 1 1 1 1 1 1 1 1 1 1 1 1 2 G R 0 1 E 1 2 11 5 PROPELLER FAN 1 1 1 1 1 1 1 1 1 1 1 1 3 G R 0 1 E 0 9 0 9 7 NUT 1 1 1 1 1 1 1 1 1 1 1 1...
Page 126 RoHS PARTS LIST FUNCTIONAL PARTS PUZ-A42NHA4 PUZ-A42NHA4-BS PUY-A42NHA4 PUY-A42NHA4-BS OCB481B...
Page 127 RoHS PARTS LIST Parts numbers that are circled are not shown in the figure. Q'ty/unit Wiring Parts No. Parts Name Specification Diagram Symbol 1 G T 7 W E 2 7 7 6 3 FAN MOTOR MF1,2 2 G R 0 1 E 1 2 1 1 5 PROPELLER FAN 3 G R 0 1 E 0 9 0 9 7 NUT 4 G T 7 W E 6 1 4 0 8 HEAT EXCHANGER 5 G T 7 W E 2 1 2 4 2 SOLENOID COIL <4-WAY VALVE>...
Page 128 RoHS PARTS LIST STRUCTURAL PARTS PUZ-A18NHA4 PUZ-A18NHA4R1 PUY-A12NHA4 PUY-A12NHA4R1 PUY-A18NHA4 PUY-A18NHA4R1 PUZ-A18NHA4-BS PUZ-A18NHA4R1-BS PUY-A12NHA4-BS PUY-A12NHA4R1-BS PUY-A18NHA4-BS PUY-A18NHA4R1-BS Q'ty/unit Parts No. Parts Name 1 G R 0 1 E 3 0 6 9 1 GRILLE 2 G R 0 1 E 2 5 6 6 8 FRONT PANEL G R 0 1 E 3 4 6 8 6 BASE ASSY G R 0 1 E 4 8 6 8 6 BASE ASSY 4 G T 7 W E 0 0 6 1 7 CONDUIT PLATE...
Page 129 RoHS PARTS LIST STRUCTURAL PARTS PUZ-A24NHA4 PUZ-A30NHA4 PUZ-A36NHA4 PUY-A24NHA4 PUY-A30NHA4 PUY-A36NHA4 PUZ-A24NHA4-BS PUZ-A30NHA4-BS PUZ-A36NHA4-BS PUY-A24NHA4-BS PUY-A30NHA4-BS PUY-A36NHA4-BS Q'ty/unit Parts No. Parts Name 1 G R 0 1 E 1 9 6 6 2 SIDE PANEL (L) 2 G T 7 W E 0 3 6 9 1 FAN GRILLE 3 G T 7 W E 0 5 6 6 7 FRONT PANEL 4 G R 0 1 E 3 3 6 8 6 BASE ASSY 5 G R 0 1 E 1 2 1 3 0 MOTOR SUPPORT...
Page 130 RoHS PARTS LIST STRUCTURAL PARTS PUZ-A42NHA4 PUY-A42NHA4 PUZ-A42NHA4-BS PUY-A42NHA4-BS OCB481B...
Page 131 RoHS PARTS LIST Q'ty/unit Wiring Recom- Parts No. Parts Name Diagram mended Symbol Q,ty 1 G R 0 1 E 3 3 6 6 2 SIDE PANEL (L) 2 G T 7 W E 0 3 6 9 1 FAN GRILLE 3 G T 7 W E 0 6 6 6 7 FRONT PANEL 4 G R 0 1 E 2 6 6 8 6 BASE ASSY 5 G R 0 1 E 1 9 1 3 0 MOTOR SUPPORT...
Page 132 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2010 MITSUBISHI ELECTRIC CORPORATION Distributed in Mar. 2014 No.OCB481 REVISED EDITION-B New publication, effective Mar. 2014 Distributed in Jul. 2012 No.OCB481 REVISED EDITION-A Specifications are subject to change without notice. Distributed in Nov. 2010 No.OCB481 Made in Japan...

Mitsubishi Electric Mr.Slim PUZ-A18NHA4R1 Service Manual

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