Mitsubishi Electric PUY-A12NHA2 Service Manual Download Page 12

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Representative matching

PKA-A12GA

PKA-A18GA

PKA-A24FA

PKA-A30FA

PKA-A36FA

PLA-A42BA

Mode

COOLING

Total

Capacity

BTU/h

12,000

18,000

24,000

30,000

34,200

42,000

Input

1,210

2,240

2,650

4,400

5,030

4,600

Electrical circuit

Indoor unit model

PKA-A12GA

PKA-A18GA

PKA-A24FA

PKA-A30FA

PKA-A36FA

PLA-A42BA

Phase

Single

Cycle

60Hz

Voltage

230V

Current

0.33A

0.43A

0.52A

1.00A

Outdoor unit model

PUY-A12NHA2

PUY-A18NHA2

PUY-A24NHA2

PUY-A30NHA2

PUY-A36NHA2

PUY-A42NHA2

Phase

Single

Cycle

60Hz

Voltage

230V

Current

5.09A

9.71A

11.45A

19.29A

22.03A

20.35A

Refrigerant circuit

Discharge pressure

MPa

2.99

3.14

2.85

2.99

3.22

Suction pressure

MPa

1.00

0.81

0.86

0.72

0.76

Discharge temperature

72.8

81.6

72.6

83.7

88.8

Condensing temperature

50.7

52.0

46.8

49.1

51.5

Suction temperature

11.1

4.8

7.0

1.2

3.3

Ref. Pipe length

7.6

2.83

0.82

73.4

47.5

4.9

7.6

410

120

164

118

Discharge pressure

PSIG

434

455

414

434

467

Suction pressure

PSIG

145

118

125

104

110

Discharge temperature

163

179

163

183

192

Condensing temperature

123

126

116

120

125

Suction temperature

Ref. Pipe length

side

Indoor

Intake air temperature DB

26.7

Intake air temperature WB

19.4

12.9

Discharge air temperature DB

14.8

12.2

13.7

12.1

13.7

side

Outdoor Intake air temperature DB

Intake air temperature WB

23.9

side

Indoor

Intake air temperature DB

˚F

Intake air temperature WB

˚F

Discharge air temperature DB

˚F

side

Outdoor Intake air temperature DB

˚F

Intake air temperature WB

˚F

SHF

0.86

0.70

0.78

0.70

0.77

0.71

0.09

0.12

0.10

0.11

0.15

5-4-2. Cooling only

Summary of Contents for PUY-A12NHA2

Page 1: ...S PUZ A30NHA2 BS PUZ A36NHA2 BS PUZ A42NHA2 BS PUY A12NHA2 PUY A18NHA2 PUY A24NHA2 PUY A30NHA2 PUY A36NHA2 PUY A42NHA2 PUY A12NHA2 BS PUY A18NHA2 BS PUY A24NHA2 BS PUY A30NHA2 BS PUY A36NHA2 BS PUY A42NHA2 BS Service Ref PUZ A18NHA2 PUZ A24NHA2 PUZ A30NHA2 PUZ A36NHA2 PUZ A42NHA2 PUZ A18NHA2 BS PUZ A24NHA2 BS PUZ A30NHA2 BS PUZ A36NHA2 BS PUZ A42NHA2 BS PUY A12NHA2 PUY A18NHA2 PUY A24NHA2 PUY A30N...

Page 2: ... 42BA PLA A12 18 24 30 36 42BA1 OCH420 OCB420 PCA A24 30 36 42GA PCA A24 30 36 42GA2 OC368 PKA A12 18GA PKA A12 18GA2 OC369 PKA A12 18GAL PKA A12 18GAL2 PKA A24 30 36FA PKA A24 30 36FA2 PKA A24 30 36FAL PKA A24 30 36FAL2 1 2 TECHNICAL DATA BOOK Manual No OCS13 1 REFERENCE MANUAL ...

Page 3: ...ant can cause deterioration of refrigerant oil etc Use a vacuum pump with a reverse flow check valve Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc Use the following tools specifically designed for use with R410A refrigerant The following tools are necessary to use R410A refrigerant Keep the tools with care If dirt dust or moisture ente...

Page 4: ...e 7 Refrigerant cylinder Only for R410A Top of cylinder Pink Cylinder with syphon 8 Refrigerant recovery equipment 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...

Page 5: ...tside diameter Dimension A 0 0 4 Unit mm inch R410A R22 1 4 3 8 1 2 5 8 3 4 6 35 9 52 12 70 15 88 19 05 17 0 43 64 22 0 7 8 26 0 1 3 64 29 0 1 9 64 17 0 22 0 24 0 27 0 36 0 Nominal dimensions inch Flare nut dimensions Outside diameter Dimension B Unit mm inch R410A R22 Gauge manifold Charge hose Gas leak detector Refrigerant recovery equipment Refrigerant cylinder Applied oil Safety charger Charge...

Page 6: ...ax A12 36 70ft 20m max and 16ft 5m min of piping The additional refrigerant charging work during installation often causes problems It is completely eliminated by chargeless system This unique system improves the quality and reliability of the work done It also helps to speed up the installation time PUZ A24 30 36NHA2 PUZ A24 30 36NHA2 BS PUY A24 30 36NHA2 PUY A24 30 36NHA2 BS PUZ A42NHA2 PUZ A42N...

Page 7: ...d level Cooling dB 46 48 48 48 51 Heating dB 47 50 50 50 55 Protection devices HP switch HP switch HP switch HP switch HP switch LP switch Discharge thermo Discharge thermo Discharge thermo Discharge thermo Discharge thermo Dimension W mm 800 950 950 950 950 D mm 300 23 330 30 330 30 330 30 330 30 H mm 600 943 943 943 1350 W in 31 1 2 37 12 32 37 12 32 37 12 32 37 12 32 D in 11 13 16 7 8 13 1 3 16...

Page 8: ...ces HP switch HP switch HP switch HP switch HP switch HP switch LP switch Discharge thermo Discharge thermo Discharge thermo Discharge thermo Discharge thermo Discharge thermo Dimension W mm 800 800 950 950 950 950 D mm 300 23 300 23 330 30 330 30 330 30 330 30 H mm 600 600 943 943 943 1350 W in 31 1 2 31 1 2 37 12 32 37 12 32 37 12 32 37 12 32 D in 11 13 16 7 8 11 13 16 7 8 13 1 3 16 13 1 3 16 13...

Page 9: ... 1 kg 3 2 kg 3 4 kg 3 6 kg 3 7 kg 3 9 kg 4 1 kg 4 3 kg 4 4 kg 2 7 kg PUY A36NHA2 BS PUY A36NHA2 PUZ A36NHA2 BS PUZ A36NHA2 84 oz 90 oz 96 oz 102 oz 108 oz 114 oz 120 oz 126 oz 132 oz 138 oz 144 oz 150 oz 156 oz 96 oz 2 4 kg 2 6 kg 2 7kg 2 9 kg 3 1 kg 3 2 kg 3 4 kg 3 6 kg 3 7 kg 3 9 kg 4 1 kg 4 3 kg 4 4 kg 2 7 kg PUY A42NHA2 BS PUY A42NHA2 PUZ A42NHA2 BS PUZ A42NHA2 132 oz 136 oz 142 oz 148 oz 154 ...

Page 10: ...00 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 μbar BAND CENTER FREQUENCIES Hz PUY A24 30 36NHA2 PUY A24 30 36NHA2 BS PUZ A24 30 36NHA2 PUZ A24 30 36NHA2 BS COOLING MODE HEATING 48 SPL dB 50 LINE 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEA...

Page 11: ... 9 51 5 48 0 Suction temperature 4 8 1 2 7 0 0 3 1 2 1 6 3 3 2 0 Ref Pipe length m 7 6 7 6 7 6 7 6 7 6 7 6 7 6 7 6 20 35A 2 83 0 82 73 4 47 5 4 9 7 6 410 120 164 118 40 21 48A 2 93 0 69 80 3 47 5 0 3 7 6 425 100 177 118 33 Discharge pressure PSIG 455 490 414 440 434 508 467 428 Suction pressure PSIG 118 93 125 99 104 94 110 87 Discharge temperature F 179 192 163 175 183 198 192 181 Condensing temp...

Page 12: ...emperature 72 8 81 6 72 6 83 7 88 8 Condensing temperature 50 7 52 0 46 8 49 1 51 5 Suction temperature 11 1 4 8 7 0 1 2 3 3 Ref Pipe length m 7 6 7 6 7 6 7 6 7 6 2 83 0 82 73 4 47 5 4 9 7 6 410 120 164 118 40 Discharge pressure PSIG 434 455 414 434 467 Suction pressure PSIG 145 118 125 104 110 Discharge temperature F 163 179 163 183 192 Condensing temperature F 123 126 116 120 125 Suction tempera...

Page 13: ...outlet 4 oval hole Air intake Service panel Connection for liquid pipe Service panel for charge plug Service port Connection for gas pipe Min 100mm 3 15 16 Min 500mm 19 11 16 Min 350mm 13 25 32 Basically open Max Foundation bolt height FOUNDATION Please secure the unit firmly with 4 foundation M10 W3 8 bolts Bolts washers and nut must be purchased locally 18mm 23 32 33 1 5 16 drain hole 43 6 1 23 ...

Page 14: ...Left Power supply wiring Reight Indoor Outdoor wiring Terminal Block 63 2 1 2 73 2 7 8 75 2 31 32 40 1 9 16 92 3 5 8 92 3 5 8 27 1 1 16 23 29 32 55 2 3 16 19 3 4 Conduit hole 2 27 1 1 16 Knockout Right trunking hole Knockout Right piping hole Knockout 9 2 3 5 8 45 1 25 32 65 2 9 16 92 3 5 8 40 1 9 16 63 2 1 2 23 29 32 73 2 7 8 55 2 3 16 27 1 1 16 Conduit hole 2 27 1 1 16 Knockout Front trunking ho...

Page 15: ... 2 Rear piping hole Knockout Rear trunking hole Knockout Conduit hole 2 27 1 1 16 Knockout 9 2 3 5 8 19 3 4 55 2 3 16 92 3 5 8 75 2 31 32 40 1 9 16 73 2 7 8 63 2 1 2 23 29 32 27 1 1 16 92 3 5 8 Right piping hole Knockout Right trunking hole Knockout Conduit hole 2 27 1 1 16 Knockout 92 3 5 8 92 3 5 8 65 2 9 16 45 1 25 32 40 1 9 16 27 1 1 16 55 2 3 16 23 29 32 73 2 7 8 63 2 1 2 Front piping hole Kn...

Page 16: ...ctor Transmission Connector Power Supply Connector M NET communication Switch Status of communication Switch Address setting 1st digit SW12 LED1 LED2 LED3 LED4 LED5 Switch Address setting 2nd digit LED Power Supply DC5V LED Connection to Outdoor Unit LED Transmission Sending LED Transmission Recelving LED Power Supply DC12V LED1 LED2 LED Operation Inspection Indicators P B C B CNF1 WHT MF1 MS 3 7 ...

Page 17: ... ACL Terminal Block Power Supply Indoor Outdoor Motor for Compressor Fan Motor Solenoid Valve Four Way Valve High Pressure Switch SV Solenoid Valve Bypass Valve Thermistor Outdoor Pipe Thermistor Discharge Thermistor Outdoor 2 Phase Pipe Thermistor Outdoor Thermistor Heatsink Electronic Expansion Valve Reactor Power Circuit Board Connection Terminal U V W Phase P B U V W Noise Filter Circuit Board...

Page 18: ...M CNMNT CNVMNT CNDM Connector A Control Service Inspection Kit Connector Connected to Optional M NET Adapter Board Connector Connected to Optional M NET Adapter Board Connector Connection for Option Contact Input X51 X52 X55 Relay CY1 CY2 Capacitor Switch Test Operation Switch Function Switch SW4 SW5 1 2 3 4 5 6 OFF ON PUZ A30N PUZ A36N MODEL SW6 w1 MODEL SELECT SW5 5 6 1 2 3 4 5 6 OFF ON 1 2 3 4 ...

Page 19: ...ion Connector Transmission Connector Power Supply Connector M NET communication Switch Status of communication Switch Address setting 1st digit Switch Address setting 2nd digit LED Power Supply DC5V LED Connection to Outdoor Unit LED Transmission Sending LED Transmission Recelving LED Power Supply DC12V wUse copper supply wires CY1 CY2 Capacitor Switch Test Operation SW4 1 2 3 4 5 6 OFF ON PUZ A42...

Page 20: ...comply with the applicable local and national code 2 Use copper supply wires 3 Use wires rated 600V or more for the power supply cables and the indoor outdoor unit connecting cables 4 Install an earth longer than other cables Notes Outdoor unit model Outdoor unit power supply Breaker size Minimum circuit ampacity Maximum rating of overcurrent protective device Outdoor unit power supply Outdoor uni...

Page 21: ...T always against the ground Notes 1 Wiring size must comply with the applicable local and national code 2 Use copper supply wires 3 Use wires rated 300V or more for the power supply cables 4 Install an earth longer than other cables Indoor unit model Indoor unit power supply Minimum circuit ampacity Maximum rating of overcurrent protective device Indoor unit power supply Indoor unit power supply e...

Page 22: ...ect the indoor outdoor connecting cables directly to the units no intermediate connections Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point Indoor unit Outdoor unit Indoor Outdoor separate power supply Max 120m 393ft 2 o Min AWG22 Wire No o Size w The o...

Page 23: ...ng spots on the shield wire noise may enter into the shield wire because the ground wire and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among ground ing spots In case of single spot grounding noise does not enter into the shield wire because the ground wire and shield wire do not form one circuit To avoid communication errors caused by...

Page 24: ...dresses are 00 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 23 4 5 6 7 8 9 0 1 2 50 M NET Address No Setting example Switching setting SW11 ones digit SW12 tens digit OFF ON 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 ...

Page 25: ...e 6 35A 1 4 Stop valve 4 way valve Service port check High pressure protect switch Outdoor heat exchanger Thermistor TH3 Thermistor TH6 Distributor Muffler Thermistor TH4 Linear expansion valve Refrigerant flow in cooling Refrigerant flow in heating 50 Strainer 100 Strainer 100 Strainer 4 way valve solenoid coil Heating ON Cooling OFF PUZ A42NHA2 PUZ A42NHA2 BS Service port check Accumulator Compr...

Page 26: ...eck Accumulator Compressor Refrigerant GAS pipe 12 7A 1 2 Refrigerant LIQUID pipe 6 35A 1 4 Stop valve High pressure protect switch Thermistor TH4 Linear expansion valve Refrigerant flow in cooling Stop valve with service port 50 Strainer 100 Strainer 100 Strainer Service port check Accumulator Compressor Refrigerant GAS pipe 15 88A 5 8 Refrigerant LIQUID pipe 9 52A 3 8 Service port check High pre...

Page 27: ...r 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 CEN TRALLY CONTROLLED is displayed the refrigerant collecting pump down cannot be completed normally 2After the liquid stop valve is closed set the SWP switch on the control board of the ...

Page 28: ... is no abnormality concerning of parts such as electrical component controller board remote controller and etc 1Re check the abnormal symptom 2Conduct trouble shooting and ascertain the cause of the trouble according to 10 5 Troubleshooting by inferior phenomena 3Continue to operate unit for the time being if the cause is not ascertained 4There is no abnormality concerning of parts such as electri...

Page 29: ... alternately F1 After startup is displayed green once and red twice blink alternately F3 F5 F9 After startup is displayed green twice and red once blink alternately EA Eb After startup is displayed only green lights up 00 After startup is displayed only green lights up 00 indicates digital display 2 Press TEST button twice 1 Turn on the main power supply 3 Press OPERATION SWITCH button 4 Press AIR...

Page 30: ...tatus of remote controller display and current operation mode are displayed 3 Press the button to activate mode then check whether cool air is blown out from the unit 4 Press the button to activate mode then check whether warm air is blown out from the unit 5 Press the button and check whether strong air is blown out from the unit 6 Press the button and check whether the auto vane operates properl...

Page 31: ...error codes the latest check code can be recalled even if it is cancelled by the remote controller or power is shut off Check the error code history for each unit using the remote controller 1 Switch to self diagnosis mode H Press the CHECK button twice within 3 seconds The display content will change as shown below 2 Set the unit number or refrigerant address you want to diagnose F Press the TEMP...

Page 32: ...e display content will change as shown below A Press the FILTER button to start self diagnosis 3 Remote controller self diagnosis result When the remote controller is functioning correctly Check for other possible causes as there is no problem with the remote controller When the remote controller malfunctions Error display 1 NG blinks The remote controller s transmitting receiv ing circuit is defe...

Page 33: ...tdoor unit installation manual If an air conditioner error occurs the indoor unit s sensor emits an intermit tent buzzer sound the operation lamp blinks and the error code is output It takes 3 seconds at most for error code to appear The check mode is cancelled Malfunction diagnosis method at maintenance service 10 3 4 Malfunction diagnosis method by wireless remote controller In case of trouble d...

Page 34: ... INDICATOR lamp blinks Check code Number of times Wireless remote controller Wired remote controller Errors detected by unit other than indoor unit outdoor unit etc Symptom Remark 1 Indoor outdoor unit communication error 2 Transmitting error Outdoor unit 3 Open short of outdoor unit thermistors 4 Compressor overcurrent interruption When compressor locked 5 Abnormal high discharging temperature in...

Page 35: ...n outdoor power circuit board A12 A24N Disconnection of connector R or S Refer to 10 9 A30 A42N Disconnection of connector TABT or TABS Refer to 10 9 3 Check connection of the connector CNDC on the outdoor controller circuit board Check connection of the connector LD1 and LD2 for A12 A24N and CNDC for A30 A36N on the outdoor power circuit board Refer to 10 9 4 Check connection of reactor DCL or AC...

Page 36: ...number of indoor units that are connected to one outdoor unit If EA is detected 4 6 Turn the power off once and on again to check Replace outdoor controller circuit board indoor controller board or indoor power board if abnormality occurs again 7 Check if refrigerant addresses SW1 3 to SW1 6 on outdoor controller circuit board are overlapping in case of group control system 8 Check transmission pa...

Page 37: ... and action for F5 7 Check linear expansion valve Refer to 10 6 7 8 Replace outdoor controller board Case U2 1102 High discharging temperature 1 Abnormal if discharge temperature ther mistor TH4 exceeds 125 257 F or 110 230 F continuously for 5 min utes Abnormal if condenser evaporator tem perature thermistor TH5 exceeds 40 104 F during defrosting and discharge temperature thermistor TH4 exceeds 1...

Page 38: ...ctor TH4 on the outdoor controller circuit board Check breaking of the lead wire for thermistor TH4 Refer to 10 9 2 Check resistance value of thermistor TH4 or temperature by microcomputer Thermistor TH4 Refer to 10 6 SW2 on A Control Service Tool Refer to 10 10 3 Replace outdoor controller board U4 TH3 5105 TH6 5107 TH7 5106 TH8 5110 Open short of outdoor unit thermistors TH3 TH6 TH7 and TH8 Abno...

Page 39: ...only if operation frequency is more than or equal to 40Hz or compres sor current is more than or equal to 5A Abnormal power synchronous zero cross signal PFC error overcurrent when the current peak of input current increase A12 18 24N 47A peak 1 Decrease of power supply volt age 2 Disconnection of compressor wiring 3 Disconnection or loose con nection of CN52C 4 Defective PFC module of out door po...

Page 40: ...r unit of refrigerant address 0 for 3 minutes Error code E0 2 Abnormal if sub remote controller could not receive for any signal for 2 minutes Error code E0 1 Abnormal if indoor controller board can not receive any data normally from remote controller board or from other indoor controller board for 3 minutes Error code E4 2 Indoor controller board cannot receive any signal from remote controller f...

Page 41: ...Abnormal if communication between outdoor controller circuit board and M NET board is not available 1 Check disconnection looseness or breaking of connection wire between outdoor controller cir cuit board CNMNT and M NET board CN5 2 Check disconnection looseness or breaking of connection wire between outdoor controller cir cuit board CNMNT and M NET board CND 3 Check M NET transmission wiring meth...

Page 42: ...LOSSNAY or remote con troller is not connected to terminal block for central control TB7 of outdoor unit 2 Check if transmission wire of indoor unit FRESH MASTER or LOSSNAY is not con nected to terminal block for transmission wire of outdoor unit 3 Check if terminal block for transmission wire TB3 and terminal block for central control TB7 are not connected 4 Check transmission waveform or noise o...

Page 43: ...ction of transmission connector CN2M of outdoor unit 3 Defective transmitting receiv ing circuit of outdoor unit or indoor unit Always try the followings when the error A7 occurs 1 Turn off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSS NAY at the same time for 2 minutes or more and turn the power on again If malfunction was accidental the unit returns to normal 2 Check ...

Page 44: ...y of same refrigerant sys tem with LOSSNAY is turned off or within 2 minutes of restart abnormality is detect ed 3 Contact failure of transmission wire of indoor unit of LOSS NAY 4 Disconnection of transmission connector CN2M of indoor unit 5 Defective transmitting receiv ing circuit of indoor unit or LOSSNAY 7 If displayed address or attribute is nonexistent 1 The unit of former address does not ...

Page 45: ...or Check LED3 on indoor controller board 1 When LED3 is not blinking Check indoor outdoor connecting wire for miswiring Converse wiring of S1 and S2 or break of S3 wiring 2 When LED3 is blinking Indoor outdoor connecting wire is nor mal 4Check LED display on outdoor controller circuit board Refer to 10 10 Check protection device connector 63L and 63H for contact failure Refer to 10 9 Error Code Ab...

Page 46: ...e remote controller 12Normal operation For protection of compressor 12Normal operation 4 Even controlling by the wireless remote controller no beep is heard and the unit does not start operat ing Operation display is indicated on wireless remote controller 1The pair number settings of the wireless remote controller and indoor controller board are mis matched 1Check the pair number settings 5 When ...

Page 47: ...osis after turning on the main power Normal The start up diagnosis will be over in around 2 minutes Miswiring of indoor outdoor connecting wire Breaking of indoor outdoor connecting wire S3 Defective indoor controller board Defective outdoor controller circuit board Refer to Self diagnosis action table in order to solve the trouble In case of communication errors the display of remote controller m...

Page 48: ...ring of the outdoor unit Check if the wiring is bad Check if the fuses are blown The fuses on the outdoor controller circuit board will be blown when the indoor outdoor connecting wire short circuits Bad wiring of the outdoor controller board The fuses on the outdoor controller circuit board are blown Check if miswiring breaking or poor contact is causing this problem Indoor outdoor connecting wir...

Page 49: ...d Replace the outdoor controller circuit board Normal Only the unit which has the refrigerant address 0 supplies power to the remote controller Set the refrigerant address to 0 In case of the multiple grouping system recheck the refrigerant address again Defective indoor power board Replace the indoor power board Defective outdoor power circuit board Replace the outdoor power circuit board Defecti...

Page 50: ...contact of the remote controller wire Check the voltage of the terminal block TB5 connecting the remote controller wire If it is not between DC 10V and DC16V the indoor controller board must be defective The remote controller wire short circuits Check if the remote controller wire is short circuited Defective indoor controller board Replace the indoor controller board Diagnosis flow Cause Inspecti...

Page 51: ...ler twice to clear FILTER from the display See the operation manual that came with the product for how to clean the filters 3 STANDBY is displayed on the screen 3 This is displayed when the unit starts HEAT operation when the thermostat puts the compressor in operation mode or when the outdoor unit ends DEFROST operation and returns to HEAT operation The display will automatically disappear around...

Page 52: ...f the outdoor unit is controlling the airflow amount in order to keep the optimum operating condition 5 A sound similar to water flowing is heard from the unit 5 This is not a malfunction This is the sound which is heard when the refrigerant is flowing inside the indoor unit 2 The fan speed doesn t match the setting of the remote controller in HEAT operation The up down vane will be automatically ...

Page 53: ... 3 The airflow direction doesn t change Up down vane left right louver 3 1 Check if the vane is set to a fixed position Check if the vane motor connector is removed 2 Check if the air conditioner has a function for switching the air direction 3 If the air conditioner doesn t have that function NOT AVAILABLE will be displayed on the remote controller when AIR DIRECTION or LOUVER button is pressed S...

Page 54: ...ater drips down Heating water drips down from the heat exchanger Use optional parts Drain Socket and Drain pan if these water needs to be collected and drained out for once Water or moisture is expelled from the outdoor unit Batteries are being exhausted Replace them and press the reset button of remote controller The display of wireless remote controller gets dim or doesn t come on The indoor uni...

Page 55: ...Motor for compressor MC Linear expansion valve LEV A For A12 18 Linear expansion valve LEV A For A24 42 Normal Abnormal Open or short A18 36 A42 Open or short Disconnect the connector then measure the resistance with a tester Winding temperature 20 68 F Measure the resistance between the terminals with a tester At the ambient temperature 20 68 F Normal 1450 150 Abnormal Open or short Solenoid valv...

Page 56: ...tor CNF1 2 Fuse check Check the fuse F5 on outdoor controller board Power supply check Remove the connector CNF1 2 Measure the voltage in the outdoor controller circuit board TEST POINT 1 VDC between 1 and 4 of the fan connector VDC DC250 330V TEST POINT 2 VCC between 5 and 4 of the fan connector VCC DC15V Wiring recovery Replace outdoor controller board Replace the fan motor Replace outdoor contr...

Page 57: ... 250k 30 86 F 160k 40 104 F 104k 50 122 F 70k 60 140 F 48k 70 158 F 34k 80 176 F 24k 90 194 F 17 5k 100 212 F 13 0k 110 230 F 9 8k High temperature thermistor Thermistor Discharge TH4 0 10 20 30 40 50 20 10 0 10 20 30 40 50 4 14 32 50 68 86 104122 F Temperature Resistance k 500 400 300 200 100 0 25 50 75 100 120 77 122 167 212 248 F Temperature Resistance k 0 32 F 180k 25 77 F 50k 50 122 F 17k 70 ...

Page 58: ... sound can be heard than normal situation No sound is heard when the pulse number moves from B to A in case coil is burn out or motor is locked by open phase Sound can be detected by placing the ear against the screw dri ver handle while putting the screw driver to the linear expansion valve LEV M 1 6 4 4 3 2 1 2 1 Red Brown Blue Orange Yellow White 3 4 5 6 Connector LEV A DC12V Outdoor controller...

Page 59: ... sound can be heard than normal situation No sound is heard when the pulse number moves from B to A in case coil is burn out or motor is locked by open phase Sound can be detected by placing the ear against the screw dri ver handle while putting the screw driver to the linear expansion valve LEV M 1 6 4 4 3 2 1 1 Gray Orange Red Yellow Black 3 4 5 6 Connector LEV A DC12V Outdoor controller board D...

Page 60: ...irmly Otherwise pipes can bend due to pressure How to attach the coil Hold the lower part of the main body shown as A firmly so that the main body does not move and attach the coil by inserting it downward into the main body Then securely attach the coil stop per to pipe B At this time be careful that stress is not added to lead wire and main body is not wounded by lead wire If the stopper is not ...

Page 61: ...Otherwise pipes can bend due to pressure How to attach the coil Hold the lower part of the main body shown as A firmly so that the main body does not move and attach the coil by inserting it downward into the main body Then securely attach the coil stop per to main body At this time be careful that stress is not added to lead wire and main body is not wounded by lead wire If the stopper is not fir...

Page 62: ... air conditioner will continuously be operated by supplying power and stopping it It can not be turned on or off by remote control and temperature control is not possible 4Do not perform emergency heating operation for an extended period of time If the outdoor unit starts defrosting during this period cold air will blow out from the indoor unit 5Do not perform emergency cooling operation for more ...

Page 63: ... F 7 45 F 5 30degC 54degF 5degC 9degF w1 w1 w1 w2 w2 Remarks w1 If the thermistor temperature data is normal not open short that data is loaded into the control as valid data When the unit enters emergency operation and TH values are mismatched set the thermistors to open short And the unit runs emergency operation with the values listed above w2 If one thermistor is set to open short the values o...

Page 64: ...ced defrost detect history record reset refrigerant address CNDM 1 to 2 Input of low level sound priority mode 1 to 3 Input of external con tact point TH4 Thermistor Discharge TH3 Thermistor Outdoor pipe TH7 6 Thermistor Outdoor 2 phase pipe CNDC 280V DC 1 3 Outdoor power circuit board VFG TEST POINT 4 Voltage between right pins of PC5C and PC5D pin 3 and pin 4 Same as CNF17 4 VSP TEST POINT 3 Vol...

Page 65: ...2C 52C relay signal Connect to the outdoor controller circuit board CN52C CN5 Primary current Connect to the outdoor power circuit board CN5 CNAC1 CNAC2 208 230V AC Connect to the outdoor controller circuit board CNAC EI Connect to the earth LI NI Voltage of 208 230V AC is input Connect to the terminal block TB1 E3 Connect to the earth E2 Connect to the earth ...

Page 66: ...ller circuit board CN52C CN5 Primary current Connect to the outdoor power circuit board CN5 CNAC1 CNAC2 208 230V AC Connect to the outdoor controller circuit board CNAC EI E2 Connect to the earth E3 Connect to the earth Outdoor noise filter circuit board PUZ A24NHA2 PUZ A24NHA2 BS PUY A24NHA2 PUY A24NHA2 BS ...

Page 67: ...E2 Connect to the earth LO NO Voltage of 208 230V AC is output Connect to the outdoor power circuit board TABS TABT RS1 CN52C 52C driving signal Connect to the outdoor controller circuit board CN52C CN5 Primary current Connect to the outdoor power circuit board CN5 Outdoor noise filter circuit board PUZ A30 36 42NHA2 PUZ A30 36 42NHA2 BS PUY A30 36 42NHA2 PUY A30 36 42NHA2 BS ...

Page 68: ...e ACL 208 230V AC U V W Connect to the compressor MC Voltage among phases 5V to 180V AC LD9 Connect to the earth Only A24 CN5 Primary current detection Connect to the outdoor noise filter circuit board CN5 CN4 Connect from the outdoor controller circuit board CN4 CN3 Thermistor Heatsink TH8 DIP IPM DIP PFC Brief check of DIP IPM and DIP PFC W Usually they are in a state of being short circuited if...

Page 69: ...V DC 1 3 Connect to the outdoor controller circuit board TABS TABT Connect to the outdoor noise filter circuit board Voltage among phases 208 230V AC Brief check of POWER MODULE W Usually they are in a state of being short circuited if they are broken Measure the resistance in the following points connectors etc If they are short circuited it means that they are broken 1 Check of diode bridge TABP...

Page 70: ...tive filter module PUZ A30 36 42NHA2 PUZ A30 36 42NHA2 BS PUY A30 36 42NHA2 PUY A30 36 42NHA2 BS N2 Non connect Connect to the outdoor power circuit board TABN1 Connect to the outdoor power cir cuit board CNAF 1 GND 2 1 15V DC 3 1 Control signal 4 5 Not used 6 1 Control signal Connect to the outdoor power circuit board TABP1 Upper side Lower side Connection and internal circuit diagram ...

Page 71: ...8 9 10 11 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 12 13 14 15 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON w1 Forced defrost should be done as follows 1Change the DIP SW1 1 on the outdoor controller board from OFF to ON 2Forced defrost will start by the above operation 1 if all these conditions written below are satisfied Heat mode setting 10 minutes have passed since ...

Page 72: ...8N 1 2 3 4 5 6 7 8 7 8 7 8 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON PUZ A24N 1 2 3 4 5 6 OFF ON PUY A24N 7 8 7 8 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON PUZ A30N PUZ A36N MODEL SW6 SW5 5 6 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON PUY A30N PUY A36N 1 2 3 4 5 6 7 8 7 8 7 8 7 8 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON 1 2 3 4 5 6 OFF ON 1 2 ...

Page 73: ...ease Low level sound priority mode and normal operation b Demand control Local wiring Demand control is available by external input In this mode power consumption is decreased within the range of usual 0 100 How to wire Basically the wiring is the same as a Connect an SW 1 which is procured at field to the between Orange and Red 1 and 3 of the Adaptor for external signal input PAC SC36NA and insul...

Page 74: ...g error is detected by remote controller Remote controller signal receiving error is detected by indoor unit Remote controller transmitting error is detected by indoor unit Serial communication error Communication between outdoor controller board and outdoor power board Communication between outdoor controller board and M NET P C board Communication error of M NET system W1 Error code displayed on...

Page 75: ...or thermistors Abnormality of heatsink temperature 1Check if indoor outdoor units have a short cycle on their air ducts 2Measure resistance value of outdoor thermistor TH8 1Check the outdoor fan motor Abnormality of voltage 1Check looseness disconnection and converse connection of compressor wiring 2Measure resistance value among terminals on compressor using a tester 3Check the continuity of cont...

Page 76: ... is displayed while error is being postponed 3 When the display blinks Inspection code is displayed when compressor stops due to the work of protection devices Display Contents to be inspected When power is turned on F3 F5 F9 E8 E9 EA Eb EC E0 E7 63L connector red is open 63H connector yellow is open 2 connectors 63H 63L are open Indoor outdoor communication error Signal receiving error Outdoor un...

Page 77: ...When it is 100 hours or more hundreds digit tens digit and ones digit are displayed by turns Example When 2450 hours 245 10 hours 0 5 secs 0 5secs 2 secs 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Compressor operating current 0 50 LEV A opening pulse 0 480 0 50 wOmit the figures after the decimal fractions 0 480 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed ...

Page 78: ...ory 2 Alternate display of error unit number and code 37 327 3 164 When the temperature is 100 F or more the hundreds digit tens digit and ones digit are displayed by turns Example When 130 F 0 5 secs 0 5secs 2 secs F A Code display Code display 0 20 When no error history 0 and are displayed by turns When no error history 0 and are displayed by turns 1 ON 2 3 4 5 6 Thermostat ON time 0 999 Test ru...

Page 79: ... 3 phase Display details 0 H P 1 Cooling only 0 Single phase 2 3 phase Setting details Defrosting switch Display details 0 Normal 1 For high humidity Example When heat pump 3 phase and defrosting normal are set up 20 is displayed 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Indoor pipe temperature Cond Eva TH5 1 Indoor 1 38 190 38 190 39 88 When the temperature is 0 F or less and temperature are displayed by tur...

Page 80: ...C bus voltage 180 370 180 370 When it is 100V or more hundreds digit tens digit and ones digit are displayed by turns V 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 SW2 setting 1 ON 2 3 4 5 6 Display detail Explanation for display Unit F 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Indoor setting temperature 62 86 Outdoor pipe temperature Cond Eva TH6 38 190 Outdoor heatsink tempera...

Page 81: ...tdoor unit Postponement code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in case of no postponement Code display Error code history 3 Oldest Alternate display of abnormal unit num ber and code When no error history 0 and are displayed by turns Error thermistor display When there is no error thermistor is displayed 3 Outdoor pipe temperature Liquid TH3...

Page 82: ... or less and temperature are displayed by turns Example When 15 F 0 5 secs 0 5secs 2 secs Outdoor pipe temperature Cond Eva TH6 on error occurring 38 190 38 190 39 88 C When the temperature is 0 F or less and temperature are displayed by turns Example When 15 F 0 5 secs 0 5secs 2 secs Outdoor outside temperature TH7 on error occurring 38 190 38 190 39 88 C When the temperature is 0 F or less and t...

Page 83: ...5 secs 0 5secs 2 secs 50 1 1 ON 2 3 4 5 6 Discharge superheat on error occurring SHd 0 327 Cooling TH4 TH6 Heating TH4 TH5 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 degF Minute 15 1 15 4 1 ON 2 3 4 5 6 Normal Overvoltage error Undervoltage error Input current sensor error L1 or L2 phase open error Abnormal power synchronous signal PFC error A12 18 24NHA Overvoltage Undervoltage Overcurrent PFC ACTM error Unde...

Page 84: ... 1 4 8 2 The tens digit The ones digit In this digit the total number of activated control is displayed Preventive control for excessive temperature rise of discharge temperature Preventive control for excessive temperature rise of condensing temperature Frosting preventing control Preventive control for excessive temperature rise of heatsink Example The following controls are activated Primary cu...

Page 85: ...conditioner stopped skip to step 4 Fixed Hz operation The operating frequency can be fixed to stabilize operation of inverter model If the air conditioner is currently stopped start it by this operation 2 Press the MODE button to select the desired operation mode Display A 3 Press the FILTER button to check the setting Display D Waiting for stabilization HEAT STABLE MODE STABLE MODE CANCEL COOL ST...

Page 86: ...changer temperature Comp discharge temperature Outdoor ambient temperature INDOOR UNIT INLET TEMP INDOOR UNIT H EXC TEMP INDOOR UNIT FILTER USE H Indoor room temperature Heat exchanger temperature Filter operating time 12 340 hours Display C Waiting for response Flashing After approx 10 seconds 1 1 Refrigerant address 00 Twin Refrigerant address 00 Outdoor unit Indoor unit 02 Indoor unit 01 Outdoo...

Page 87: ...ure 8 Indoor heat exchanger temperature 7 Indoor intake air temperature Cool Classification Item Result Inspection Temperature difference Heat Inspection Temperature difference Stable Unstable F F Stable Unstable F F Fixed Hz operation may not be possible under the following tempera ture ranges A In cool mode outdoor intake air temperature is 104 For higher or indoor intake air temperature is 73 F...

Page 88: ... 1 2 3 1 2 3 1 2 1 2 1 2 1 2 1 2 01 02 03 04 05 15 16 17 The setting is applied to all the units in the same refrigerant system 12 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...

Page 89: ...speed set by remote controller 27 1 cooling thermostat is OFF Stop 2 Detection of abnormality of Detect 28 1 the pipe temperature P8 Neglect 2 PLA BA Not available Swing Available Wave air flow Available Temperature correction Valid Not available Temperature correction Invalid PLA BA PLA BA 2 Functions available when setting the unit number to 01 03 or AL 07 in case of wireless remote controller W...

Page 90: ...setting Press E Specified indoor unit FAN operation Change refrigerant address or unit No 2 Switch to function setting mode Press A and B at the same time with stop the remote controller 12 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...

Page 91: ...and blinks in the unit number display area and the refrigerant address display area also blinks there are no units that corre spond to the selected unit number In this case the refrigerant address and unit number may be incorrect so repeat steps 2 and 3 to set the correct ones When grouping different refrigerant systems if an indoor unit other than the one to which the refrigerant address has been...

Page 92: ...repeated twice 3 2 beeps 0 4 seconds each repeated 3 times If a setting number that cannot be recognized by the unit is entered the setting will turn back to the original setting If the signal was not received by the sensor you will not hear a beep or a double ping sound may be heard Reenter the setting number 6 Repeat steps 4 and 5 to make an additional setting without changing unit number 7 Repe...

Page 93: ... automatic mode is displayed when the operation mode is selected 2 OFF The automatic mode is not displayed when the operation mode is selected 4 3 Mode selection setting 1 Remote controller main sub setting To switch the setting press the ON OFF button 1 Main The controller will be the main controller 2 Sub The controller will be the sub controller 2 Use of clock setting To switch the setting pres...

Page 94: ...layed when the operation mode is selected The temperature range limit is not active Initial setting value The temperature range can be changed on cooling dry mode The temperature range can be changed on heating mode The temperature range can be changed on automatic mode The remote controller will be the main controller Initial setting value The remote controller will be the sub controller The cloc...

Page 95: ...links 2 Press the button F blinks 3 Press the button C blinks 4 Press the set button with something sharp at the end MODEL SELECT is lighted for 3 seconds then turned off AUTO START ON OFF TEMP FAN VANE TEST RUN AUTO STOP AUTO START h min LOUVER MODE CHECK RESET SET CLOCK MODEL SELECT NOT AVAILABLE SWING CHECK FAN TEST RUN F C AMPM STOP STARTAMPM COOL DRY AUTO FAN HEAT 1 4 1 4 2 2 3 3 ...

Page 96: ...creen B 4 Press the CLOCK buttons and to set the desired request code No 5 Press the FILTER button to perform data request The requested data will be displayed at C in the same way as in maintenance mode Data collected during operation of the remote controller will be displayed The collected data such as temperature data will not be updated automatically even if the data changes To display the upd...

Page 97: ...ke air temperature Unit No 1 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 2 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 3 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 4 Heat mode 4 deg correction Indoor unit Liquid pipe temperature Unit No 1 Indoor unit Liquid pipe temperature Unit No 2 Indoor unit Liquid pipe temperature ...

Page 98: ... unit Error postponement history 2 previous Outdoor unit Error postponement history 3 last but one 0 255 Refer to13 2 1 DetailContentsinRequestCode Refer to13 2 1 DetailContentsinRequestCode Refer to13 2 1 DetailContentsinRequestCode Refer to13 2 1 DetailContentsinRequestCode 0000 Not connected Examples Ver 5 01 Auxiliary information displayed after version information Examples Ver 5 01 A000 Displ...

Page 99: ...ory 2 second to last Error history 3 third to last Abnormal thermistor display TH3 TH6 TH7 TH8 Operation mode at time of error Compressor Operating current at time of error Compressor Accumulated operating time at time of error Compressor Number of operation times at time of error Discharge temperature at time of error Outdoorunit Liquidpipe1temperature TH3 attimeoferror Outdoor unit Liquid pipe 2...

Page 100: ...ng time Fan motor ON time Indoor fan output value Sj value Indoor fan output value Pulsation ON OFF Indoor fan output value duty value Indoor unit Model setting information Indoor unit Capacity setting information Indoor unit SW3 information Wireless pair No indoor control board side setting Indoor unit SW5 information Indoor unit Microcomputer version information Indoor unit Microcomputer version...

Page 101: ... area A B C D C 4 Relay output state Operation mode Indoor unit Control state Request code 50 Data display Operation mode Display Operation mode 0 STOP FAN C COOL DRY H HEAT d DEFROST Relay output state Display Power currently Compressor Four way valve Solenoid valve supplied to compressor Unit No 4 state Unit No 3 state Unit No 2 state Unit No 1 state Display State 0 Normal 1 Preparing for heat o...

Page 102: ...ay SV1 Four way valve Compressor 0 1 2 3 4 5 6 7 8 9 A b C d E F ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON Actuator output state 2 Display 52C SV2 SS 0 1 2 3 4 5 6 7 ON ON ON ON ON ON ON ON ON ON ON ON Error content U9 Request code 55 Data display Error content 1 Error content 2 0 0 Error content 1 Detected Display Overvoltage Undervoltage L1 p...

Page 103: ...etting display Request code 70 Data display Capacity 10 18 9 12 11 24 14 30 20 36 25 42 Outdoor unit Setting information Request code 71 Data display Setting information 1 Setting information 2 0 0 Setting information 1 Display Defrost mode 0 Standard 1 For high humidity Setting information 2 Display Single Heat pump 3 phase cooling only 0 Single phase Heat pump 1 Cooling only 2 3 phase Heat pump ...

Page 104: ... 0 0 1 1 1 1 0 0 1 1 1 0 1 0 1 1 1 1 1 0 1 1 1 0 0 1 1 1 1 1 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 Outdoor unit switch setting display SW1 to SW10 except SW3 Request codes 73 to 82 0 Switch OFF 1 Switch ON Data display SW5 1 2 3 4 0 0 0 0 00 00 1 0 0 0 00 01 0 1 0 0 00 02 1 1 0 0 00 03 0 0 1 0 00 04 1 0 1 0 00 05 0 1 1 0 00 06 1 1 1 0 00 07 0 0 0 1 00 08 1 0 0 1 00 09 0 1 0 1 00 0A 1 1 0 1 00 0b 0 0 1...

Page 105: ...18 38 19 39 1A 3A 1b 3b 1C 3C 1d 3d 1E 3E 1F 3F Indoor unit Capacity setting information Request code 163 Data display 0 0 See the table on the right Display Capacity setting state Display Capacity setting state 00 10 42 01 11 02 12 03 13 04 14 05 15 06 12 16 07 17 08 18 09 18 19 0A 1A 0b 24 1b 0C 1C 0d 30 1d 0E 1E 0F 36 1F Display Pair No setting state 00 No 0 01 No 1 J41 disconnected 02 No 2 J42...

Page 106: ...e photo 2 5 Remove the back panel fixing screws 4 10 4 from the right and 3 from the rear side and detach the back panel 2 Removing the fan motor 1 Remove the top panel See photo 1 2 Remove the front panel See photo 1 3 Remove 1 nut M6 left screw and detach the propeller 4 Disconnect the connector CNF1 on the controller circuit board in the electrical parts box 5 Loosen the clamp for the lead wire...

Page 107: ... to No 5 to remove the thermistor Outdoor TH7 3 Removing the electrical parts box 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 Disconnect the indoor outdoor connecting wire from terminal block 5 Remove all the following connectors from controller circuit board fan motor linear expansion valve thermistor Outdoor pipe thermistor Dis...

Page 108: ...to 1 5 Remove the electrical parts box See photo 5 6 Pull out the thermistor Discharge TH4 from the sensor holder See photo 8 w When attaching the thermistor Discharge TH4 place it to its original position 7 Removing the 4 way valve coil 21S4 and linear expansion valve coil LEV A 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...

Page 109: ...de panel Note 3 When installing the four way valve cover it with a wet cloth to prevent it from heating 250 F or more then braze the pipes so that the inside of pipes are not oxidized Photo 10 Photo 11 10 Removing the high pressure switch 63H 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 ...

Page 110: ...compressor fixing nuts by using spanner or adjustable wrench 10 Remove the welded pipe of motor for compressor inlet and outlet Note Recover refrigerant without spreading it in the air Accumulator leg fixing screw Accumulator leg 13 Removing the accumulator 1 Remove the service panel See photo1 2 Remove the top panel See photo 1 3 Remove the front panel See photo 1 4 Remove the conduit cover and c...

Page 111: ...ervice panel See figure 1 2 Remove the top panel See figure 1 3 Disconnect the indoor outdoor connecting wire from termi nal block 4 Remove all the following connectors from controller circuit board fan motor linear expansion valve thermistor Outdoor pipe thermistor Discharge thermistor Outdoor 2 phase pipe thermistor Outdoor high pressure switch 4 way valve and bypass valve Then remove a screw 4 ...

Page 112: ...trical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box See photo 4 5 Pull out the thermistor Outdoor TH7 from the sensor holder Note In case of replacing thermistor Outdoor TH7 replace it together with thermistor Outdoor 2 phase pipe TH6 since they are combined together Refer to No 4 above to remove thermistor Outdoor 2 phase pipe Photo 6 6 Removing the therm...

Page 113: ...ove the right side panel 6 Remove the 4 way valve coil See photo 7 7 Recover refrigerant 8 Remove the welded part of 4 way valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the 4 way valve cover it with a wet cloth to prevent it from heating 250 F or more then braze the pipes so tha...

Page 114: ...o the rear of the electrical parts box Photo 9 Reactor fixing screw 11 Removing the high pressure switch 63H 1 Remove the service panel See figure 1 2 Remove the top panel See figure 1 3 Remove the electrical parts box See photo 3 4 Remove 3 right side panel fixing screws 5 10 in the rear of the unit and remove the right side panel 5 Pull out the lead wire of high pressure switch 6 Recover refrige...

Page 115: ...ee 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 remove the back cover panel 5 Remove the electrical parts box See figure 1 6 Remove 3 valve bed fixing screws 4 10 4 ball valve and stop valve fixing screws 5 16 then remove the valve bed 7 Remove 3 right sid...

Page 116: ...r outdoor connecting wire from termi nal block 4 Remove all the following connectors from controller circuit board fan motor linear expansion valve thermistor Outdoor pipe thermistor Discharge thermistor Outdoor 2 phase pipe thermistor Outdoor high pressure switch low pressure switch 4 way valve coil Then remove a screw 4 8 from the valve bed to remove the lead wire Pull out the disconnected wire ...

Page 117: ...ctrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box See photo 4 5 Pull out the thermistor Outdoor TH7 from the sensor holder Note In case of replacing thermistor Outdoor TH7 replace it together with thermistor Outdoor 2 phase pipe TH6 since they are combined together Refer to No 4 above to remove thermistor Outdoor 2 phase pipe Photo 6 Clamp Controller ci...

Page 118: ... part of 4 way valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the 4 way valve cover it with a wet cloth to prevent it from heating 250 F or more then braze the pipes so that the inside of pipes are not oxidized 9 Removing linear expansion valve 1 Remove the service panel See figu...

Page 119: ...gure 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 4 Pull out the lead wire of high pressure switch and low pressure switch 5 Recover refrigerant 6 Remove the welded part of high pressure switch and low pressure switch Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can ...

Page 120: ...e 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 remove the back cover panel 5 Remove the electrical parts box See photo 3 6 Remove 3 valve bed fixing screws 4 10 4 ball valve and stop valve fixing screws 5 16 then remove the valve bed 7 Remove 3 r...

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Mitsubishi Electric PUY-A12NHA2, Service Manual

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