Mitsubishi Electric CITY MULTI PUMY-P112VKM6 Service Manual Download Page 114

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OCH790 _114

5. Remove the terminal cover and disconnect the compressor lead wire.

Remove 2 electrical parts box fixing screws (4 × 10) and detach the electrical parts box by pulling it upward. The

electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.

Photo 4

Electrical parts box

Terminal block

(TB1)

Noise filter

circuit board

(NF)

Terminal cover

Cover panel (Front)

Cover panel

fixing screws

Compressor (MC)

Valve bed

Valve bed fixing

screws

Valve

bed

fixing

screw

Terminal block

(TB1B)

Outdoor multi

controller

circuit board

(MULTI.B)
Terminal blocks

(TB3) (TB7)

Front panel fixing screws (5x12)

Front

panel

fixing

screws

(4x10)

Front panel

fixing screws (5x12)

Cover panel (Rear)

Photo 5

Electrical parts box

Hooks

Hook

Electrical

parts box

fixing screws

4. Removing the thermistor <Suction pipe> (TH6)

1. Remove the service panel. (See Photo 1)

Remove the top panel. (See Photo 1)

Disconnect the connectors TH6 and TH7 (red) on the outdoor multi controller circuit board in the electrical parts box.

4. Loosen the wire clamps on top of the electrical parts box.

Pull out the thermistor <Suction pipe> (TH6) from the sensor holder.

Note:

•

When replacing thermistor <Suction pipe> (TH6), replace it together with thermistor <Ambient> (TH7) since they are

combined together. Refer to procedure No.5 to remove thermistor <Ambient> (TH7).

Photo 6

Electrical parts box

Clamps

Photo 7

Thermistor

(TH6)

Thermistor

(TH4)

Ball valve

and stop

valve

fixing

screws

Thermistor

(TH2)

Compressor

(MC)

Ball valve and stop valve fixing screws

5. Removing the thermistor <Ambient> (TH7)

1. Remove the service panel. (See Photo 1)

Remove the top panel. (See Photo 1)

Disconnect the connector TH7 (red) on the outdoor multi controller circuit board in the electrical parts box.

4. Loosen the wire clamps on top of the electrical parts box. (See Photo 6.)

5. Pull out the thermistor <Ambient> (TH7) from the sensor holder.

Note:

•

When replacing thermistor <Ambient> (TH7), replace it together with thermistor <Suction pipe> (TH6), since they

are combined together. Refer to procedure No.4 to remove thermistor <Suction pipe> (TH6).

Summary of Contents for CITY MULTI PUMY-P112VKM6

Page 1: ... R410A Appendix Installation manual Exerpt of English Ver Model name indication PARTS CATALOG OCB790 Outdoor unit Model name PUMY P112VKM6 PUMY P112VKM6 ER PUMY P125VKM6 PUMY P125VKM6 ER PUMY P140VKM6 PUMY P140VKM6 ER PUMY P112YKM5 PUMY P112YKM5 ER PUMY P125YKM5 PUMY P125YKM5 ER PUMY P140YKM5 PUMY P140YKM5 ER Salt proof model PUMY P112VKM6 BS PUMY P112VKM6 ERBS PUMY P125VKM6 BS PUMY P125VKM6 ERBS ...

Page 2: ...6 ER PUMY P112YKM5 PUMY P112YKM5 ER PUMY P125YKM5 PUMY P125YKM5 ER PUMY P140YKM5 PUMY P140YKM5 ER PUMY P112VKM6 BS PUMY P112VKM6 ERBS PUMY P125VKM6 BS PUMY P125VKM6 ERBS PUMY P140VKM6 BS PUMY P140VKM6 ERBS PUMY P112YKM5 BS PUMY P112YKM5 ERBS PUMY P125YKM5 BS PUMY P125YKM5 ERBS PUMY P140YKM5 BS PUMY P140YKM5 ERBS ...

Page 3: ...e pipes with specified thickness Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc Store the piping indoors and keep both ends of the piping sealed until just before brazing Leave elbow joints etc in their packaging If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of compressor The refrigerant...

Page 4: ...tting or deburring pipes do not allow cutting chips or other foreign matters to enter the pipes If cutting chips or other foreign matters enter pipes wipe them off the inside of the pipes Do not pump down the system when a gas leak has been detected The intake of air or other gases causes abnormally high pressure in the refrigeration cycle which may cause explo sion or injury 2 1 1 Cautions for se...

Page 5: ...es higher than that of R22 their sizes of flared sections and flare nuts are different Thickness of pipes Because the working pressure of R410A is higher compared to R22 be sure to use refrigerant piping with thickness shown below Never use pipes of 0 7 mm 7 256 in or below Piping diameter and thickness Nominal dimensions in Outside diameter mm Thickness mm R410A R22 1 4 6 35 0 8 0 8 3 8 9 52 0 8 ...

Page 6: ...imension Usable by adjusting flaring dimension Usable by adjusting flaring dimension Bender Bend the pipes Tools for other refrigerants can be used Pipe cutter Cut the pipes Tools for other refrigerants can be used Welder and nitrogen gas cylinder Weld the pipes Tools for other refrigerants can be used Refrigerant charging scale Refrigerant charge Tools for other refrigerants can be used Vacuum ga...

Page 7: ...ntroller MA remote controller Model name PAR F27MEA E PAR U02MEDA PAR 4xMAA PAR 3xMAA x represents 0 or later Functions A handy remote controller for use in conjunction with the Melans centralized management system Address setting is required Address setting is not required 1 When the indoor unit of Fresh Air type is connected with the outdoor unit the maximum connectable total indoor unit capacit...

Page 8: ...SZ SF15VA or MSZ AP15VF 1 PUMY P125 MSZ SF15VA or MSZ AP15VF 2 PUMY P140 MSZ SF15VA or MSZ AP15VF 3 Connectable indoor unit lineup Heat pump inverter type Model type Model name 15 18 20 22 25 35 42 50 60 71 80 100 Wall mounted Deluxe MSZ RW VG MSZ FH VE MSZ LN VG 2 Standard MSZ GF VE MSZ SF VE MSZ AP VG E1 E6 MSZ AP VG K E2 E3 E7 MSZ EF VE MSZ EF VG E1 E2 MSZ EF VGK E1 Compact MSZ SF VA MSZ AP VF ...

Page 9: ... 8 0 to 20 2 kW 50 to 130 of outdoor unit capacity CITY MULTI indoor units 3 M series S series P series indoor units 3 Cylinder unit Hydrobox MA remote controller MA remote controller CONNECTION KIT PAC LV11M J M series indoor unit M NET remote controller Model name CMY Y62 G E CMY Y64 G E CMY Y68 G E Number of branches 2 4 8 1 When connecting ecodan unit the total capacity of connected Air to Air...

Page 10: ...eating Indoor and outdoor intake air temperature D B 17 to 43 C 2 W B 15 5 to 35 C D B 5 to 20 C 3 2 Thermo OFF FAN mode automatically starts if the outdoor temp is lower than 17 C D B 3 Thermo OFF FAN mode automatically starts if the outdoor temp is higher than 21 C D B When connecting PWFY unit Cooling Heating Indoor intake water temperature 4 D B 10 to 45 C Outdoor intake air temperature 4 W B ...

Page 11: ...OCH790 _11 10 5 0 5 10 15 39 41 43 45 47 49 51 53 55 57 Outdoor temp CDB Max outlet water temp C 3 4 3 1 Temperature curve of max outlet water ...

Page 12: ...ng 17 to 100 Motor output kW 2 9 3 5 3 9 Case heater kW 0 Lubricant FV50S 2 3liter External finish Galvanized Steel Sheet Munsell No 3Y 7 8 1 1 External dimension H W D mm 1 338 1 050 330 40 in 52 11 16 41 11 32 13 1 9 16 Protection devices High pressure protection High pressure switch Inverter circuit COMP FAN Overcurrent detection Overheat detection Heat sink thermistor Compressor Compressor the...

Page 13: ...se heater kW 0 Lubricant FV50S 2 3liter External finish Galvanized Steel Sheet Munsell No 3Y 7 8 1 1 External dimension H W D mm 1338 1050 330 40 in 52 11 16 41 11 32 13 1 9 16 Protection devices High pressure protection High pressure switch Inverter circuit COMP FAN Overcurrent detection Overheat detection Heat sink thermistor Compressor Compressor thermistor Over current detection Fan motor Over...

Page 14: ...Figure 1 CTi Σ Rated capacity of indoor unit Correction factor for indoor temperature 5 6 1 03 8 0 0 94 13 3 kW Calculation for the corrected capacity of the outdoor unit CTo Correction factor for outdoor temperature 39 C 0 92 Refer to Figure 2 Correction factor for piping length 60 m 0 88 Refer to Correcting Capacity CTo Rated capacity of outdoor unit Correction factor for outdoor temperature Cor...

Page 15: ...tdoor temperature 2 C WB 1 00 Refer to Figure 4 Correction factor for piping length 60 m 0 96 Refer to Correcting Capacity Correction factor for defrosting 0 89 Refer to Table 1 CTo Rated capacity of outdoor unit Correction factor for outdoor temperature Correction factor for piping length Correction factor for defrosting 16 0 1 00 0 96 0 89 13 7 kW Table 1 Table of correction factor for frosting ...

Page 16: ...ing capacity Outdoor temperature C DB Indoor Temperature 5 0 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 45 0 50 0 52 0 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 1 1 1 2 1 3 19 C WB Correction factor of power input Outdoor temperature C DB Indoor Temperature 15 0 10 0 5 0 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 45 0 50 0 52 0 0 0 0 2 0 4 0 6 0 8 1 0 1 2 16 C WB 18 C WB 19 C WB 20 C WB 22 C WB 24 C WB ...

Page 17: ... C 20 C Outdoor 35 C 7 C 6 C 35 C 7 C 6 C 35 C 7 C 6 C Indoor unit No of connected units Unit 2 2 2 No of units in operation 2 2 2 Model 50 1 63 1 63 2 63 1 80 1 Piping Main pipe m 5 5 5 Branch pipe 2 5 2 5 2 5 Total pipe length 10 10 10 Fan speed Hi Hi Hi Amount of refrigerant kg 7 2 7 2 7 2 Outdoor unit Electric current A 16 17 5 26 17 38 5 67 21 67 7 12 21 91 7 22 25 84 8 58 25 54 8 48 Voltage ...

Page 18: ... 0 10 0 12 0 14 0 16 0 18 0 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 0 0 5 0 10 0 15 0 20 0 25 0 V Type Current A Capacity kW Total capacity of indoor units kW Total capacity of indoor units kW Total...

Page 19: ... 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 V Type Current A Capacity kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Current A Input kW 380V 400V 415V 220V 230V 240V Y Type ...

Page 20: ...0 20 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 0 0 5 0 10 0 15 0 20 0 25 0 V Type Current A Capacity kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Current A Input kW 380V 400V 415V 2...

Page 21: ... 0 18 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 0 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 V Type Current A Capacity kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Current A Input kW 380V 400V 415V 220V 230V 240V Y Type ...

Page 22: ...0 0 22 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 0 0 5 0 10 0 15 0 20 0 25 0 30 0 V Type Current A Capacity kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Current A Input kW 380V...

Page 23: ... 5 4 0 4 5 5 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 2 0 4 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 0 0 5 0 10 0 15 0 20 0 25 0 V Type Current A Capacity kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Total capacity of indoor units kW Current A Input kW 380V 400V 415V 220V 230V 240V Y Typ...

Page 24: ...Then multiply by the heating capacity from Figure 3 and 4 in 4 2 Correction by temperature to obtain the actu al capacity Capacity Correction Curve 5 5 1 Cooling PUMY P112VKM6 BS PUMY P112YKM5 BS PUMY P112VKM6 ER BS PUMY P112YKM5 ER BS 0 20 40 60 80 100 120 140 160 180 0 50 0 55 0 60 0 65 0 70 0 75 0 80 0 85 0 90 0 95 1 00 9 4 6 3 12 5 16 2 Capacity ratio Piping equivalent length m Total capacity ...

Page 25: ...70 0 75 0 80 0 85 0 90 0 95 1 00 Capacity ratio Piping equivalent length m Figure 8 Correction of refrigerant piping length Method for obtaining the piping equivalent length Piping equivalent length piping length to the farthest indoor unit 0 3 number of bends in the piping m 5 5 3 Correction of heating capacity for frost and defrosting If heating capacity has been reduced due to frost formation o...

Page 26: ...R BS 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTER FREQUENCIES Hz NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 52 Mode Cooling Heating SPL dB LINE 50 PUMY P140VKM6 BS PUMY P140YKM5 BS PUMY P140VKM6 ER BS PUMY P140YKM5 ER BS 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 200...

Page 27: ...OCH790 _27 6 OUTLINES AND DIMENSIONS PUMY P112VKM6 BS PUMY P112VKM6 ER BS PUMY P125VKM6 BS PUMY P125VKM6 ER BS PUMY P140VKM6 BS PUMY P140VKM6 ER BS Unit mm ...

Page 28: ...OCH790 _28 PUMY P112YKM5 BS PUMY P112YKM5 ER BS PUMY P125YKM5 BS PUMY P125YKM5 ER BS PUMY P140YKM5 BS PUMY P140YKM5 ER BS Unit mm ...

Page 29: ...OCH790 _29 7 WIRING DIAGRAM PUMY P112VKM6 BS PUMY P112VKM6 ER BS PUMY P125VKM6 BS PUMY P125VKM6 ER BS PUMY P140VKM6 BS PUMY P140VKM6 ER BS ...

Page 30: ...OCH790 _30 PUMY P112YKM5 BS PUMY P112YKM5 ER BS PUMY P125YKM5 BS PUMY P125YKM5 ER BS PUMY P140YKM5 BS PUMY P140YKM5 ER BS ...

Page 31: ... Do not touch the transmission cable and remote controller cable with the tester The resistance should be over 1 0 MΩ Do not proceed inspection if the resistance is less than 1 0 MΩ Inspect between the outdoor unit power supply terminal block and ground first metallic parts like refrigerant pipes or the electrical box next then inspect all electrical wiring of outdoor unit indoor unit and all link...

Page 32: ...e thermistor TH7 open short О Check delay code 1221 U4 5109 HIC pipe temperature thermistor TH2 open short О Check delay code 1222 U4 5110 Heat sink temperature thermistor TH8 open short О Check delay code 1214 F5 5201 High pressure sensor 63HS trouble О Check delay code 1402 F3 5202 Low pressure sensor 63LS trouble О Check delay code 1400 UH 5300 Primary current error О Check delay code 4310 P4 5...

Page 33: ...lection Diagnosis of failure Check the connection of the communication line CN2 and CN4 between the outdoor multi controller circuit board and power circuit board Check the wiring Connect the CN2 and CN4 properly Replace them in the case of breakage Connect the wiring properly Replace them in the case of breakage Correct the model settings The communication circuit of either the outdoor controller...

Page 34: ... circuit board LEV performance failure Defective indoor controller board Clogged refrigerant system caused by foreign object Refrigerant shortage Refrigerant liquid accumulation in compressor while indoor unit is OFF thermo OFF Diagnosis of failure Check the connection for thermistor wiring and indoor controller board connector Refer to the diagnosis of error code 5101 Open the stop valve liquid g...

Page 35: ...ance of the outdoor multi controller circuit board Disconnect the thermistor wiring to check the resistance Disconnect the indoor LEV wiring and check the resistance Replace the outdoor multi controller circuit board Replace the thermistor Replace the indoor LEV Replace the indoor controller board Is the resistance detected Is the voltage normal value Is it free from any trace of overheating or bu...

Page 36: ...ed airflow caused by faulty inspection of out door temperature thermistor It detects lower tempera ture than actual temperature Indoor LEV performance failure Malfunction of fan driving circuit SV1 performance failure Defective High pressure sensor Defective High pressure sensor input circuit on outdoor multi controller circuit board Diagnosis of failure Refer to the diagnosis of error code 5201 T...

Page 37: ...ilter Continued from the previous page Wash the indoor heat exchanger Resolve the short cycle Wash the outdoor heat exchanger Check and repair piping Continue to the next page Disconnect the TH7 wiring and check the resistance Is the indoor unit filter clogged Is there dirt on the indoor heat exchanger Is the outdoor unit short cycled Is there dirt on the outdoor heat exchanger Are the pipes clogg...

Page 38: ...controller board Check the resistance of SV1 For the voltage refer to How to check the components Continued from the previous page Replace the TH7 Replace the indoor LEV Disconnect the indoor LEV wiring to check the resistance Continue to the next page Is the resistance detected Is the resistance detected Is the voltage normal Is it free from any trace of overheating or burning ...

Page 39: ... 63HS Replace the outdoor multi controller circuit board Reconnect the connector or connect it tightly Check the 63HS voltage Is the resistance detected Is the connector for outdoor multi controller circuit board 63H discon nected or loose Is the voltage detected No No No Yes Yes Yes For the voltage refer to How to check the components ...

Page 40: ...es and checkpoints Disconnection or loose connection of TH4 Defective holder of TH4 Disconnection of LEV coil Disconnection of LEV connector LEV performance failure Diagnosis of failure temp resistance characteristic 0 C 32 F 700 kΩ 10 C 50 F 410 kΩ 20 C 68 F 250 kΩ 30 C 86 F 160 kΩ 40 C 104 F 104 kΩ Connect the wiring properly Replace the TH4 Connect the connector properly or replace the LEV Chec...

Page 41: ...r LEV Continued from the previous page Replace the indoor controller board Replace the 63HS Replace the outdoor multi controller circuit board Check the voltage and appearance of the indoor controller board Check the 63HS voltage Is the resistance detected Is the voltage normal Is it free from any trace of overheating or burning Is the voltage detected No No No Yes Yes Yes ...

Page 42: ...nts Defective operation of stop valve not fully open Defective thermistor Defective outdoor multi controller circuit board Indoor LEV performance failure Gas leakage or shortage Defective 63HS TH3 Thermistor Outdoor liquid pipe TH7 Thermistor Ambient LEV Linear expansion valve 63HS High pressure sensor Diagnosis of failure Refer to the diagnosis of error code 5104 Check relevant thermistor wirings...

Page 43: ...63HS Replace the indoor LEV Replace the indoor controller board Check the 63HS voltage Check the voltage and appearance of the outdoor multi controller circuit board Disconnect the indoor LEV wiring and check the resistance Replace the thermistor Is the resistance detected Is the voltage detected Is the voltage normal value Is it free from any trace of overheating or burning Is the resistance dete...

Page 44: ...n Causes and checkpoints Outdoor liquid gas valve is closed Malfunction of outdoor LEV LEV1 blockage TH21 Indoor intake temperature thermistor RT11 or TH1 TH22 Indoor liquid pipe temperature thermistor RT13 or TH2 TH23 Indoor gas pipe temperature thermistor TH A to E LEV Linear expansion valve Diagnosis of failure Open the outdoor stop valve liquid gas fully Disconnect the outdoor LEV wiring to ch...

Page 45: ...Wrong piping connection between indoor unit and branch box Miswiring between indoor unit and branch box Miswiring of LEV in branch box Malfunction of LEV in branch box Diagnosis of failure Connect the piping and wiring to the same port Connect the LEV wiring to the intended port properly Disconnect the LEV wiring of branch box or indoor unit to check the resistance Replace the LEV coil Replace the...

Page 46: ... Defective outdoor power circuit board TH21 Indoor intake temperature thermistor RT11 or TH1 TH22 Indoor liquid pipe temperature thermistor RT13 or TH2 TH23 Indoor gas pipe temperature thermistor TH A to E Diagnosis of failure Reconnect the connector or connect it tightly Disconnect the connector for outdoor multi controller circuit board or 4 way valve coil to check the resistance Replace the 4 w...

Page 47: ... circuit board Diagnosis of failure Open the stop valve liquid gas fully Check the looseness disconnection or breakage of compressor wiring Ensure power supply from the facility Check for power supply open phase Set the model selection switches correctly then restart Check the stop valve Check the power supply voltage Check if the model selection switches are set correctly on the indoor controller...

Page 48: ...and W phase properly then turn the power back ON Replace the outdoor power circuit board Defective outdoor power circuit board Replace the compressor Defective compressor Check whether the compressor is faultily grounded or not Continued from the previous page Are they connected properly Is the compressor faultily grounded Yes Yes No No ...

Page 49: ... Malfunction of indoor outdoor unit fan Short cycle of indoor outdoor unit Diagnosis of failure Open the stop valve liquid gas fully Check the looseness disconnection or breakage of compressor wiring Ensure power supply from the facility Check for power supply open phase Set the model selection switches correctly Check the outdoor stop valve Check whether the power supply voltage is normal or not ...

Page 50: ...or fan motors Check for indoor outdoor short cycle Disconnect the compressor wiring from the outdoor power circuit board then check the voltage among each phases U V and W during test run SW7 1 ON Make sure to perform a voltage check with the same performing frequencies Replace the outdoor multi controller circuit board Continued from the previous page Are they connected properly Does it operate n...

Page 51: ... 6 7 8 SW1 Setting Display on LED1 2 1 2 3 4 5 6 7 8 a L1 open phase 3 phase model only b Disconnection of compressor wiring c Disconnection of terminal block for power supply d Disconnection of noise filter circuit board e Disconnection of power circuit board f Disconnection of CN52C 1 phase model only g Disconnection of CN5 3 phase model only h Disconnection of CN2 Check the power supply facilit...

Page 52: ...broken Replace the outdoor power circuit board if the resistor is not broken Operate the unit and check if the problem occurs again Check the bus voltage read by the microprocessor with an operation of SW1 on the outdoor multi controller circuit board Check the bus voltage at the test points listed below on the outdoor power circuit board using a multimeter single phase model CNDC 1 2pin three pha...

Page 53: ... error code 4400 Replace the thermistor Defective thermistor Replace the outdoor power circuit board Defective outdoor power circuit board Improve the airflow path Connect the wiring connector properly Replace it in the case of breakage Check the wiring and connector connection of TH8 Check the resistance of TH8 Is error code 5110 displayed when restarted Does the fan rotate during com pressor ope...

Page 54: ...uit board Diagnosis of failure Connect the compressor wiring U V and W phase properly then turn the power back ON Replace the outdoor power circuit board or the outdoor multi controller circuit board Defective outdoor power circuit board Replace the compressor Defective compressor Turn the power OFF to check for looseness or disconnection of the compressor wiring 1 Disconnect the compressor wiring...

Page 55: ...rmistor circuit No abnormality A connector contact failure is suspected Check the fuse on the outdoor multi controller circuit board Check the fan motor connector CNF1 and CNF2 for disconnection or looseness 1 While the breaker is OFF disconnect the compressor wiring U V W from the outdoor power circuit board 2 While the breaker is OFF disconnect the fan motor con nector CNF1 and CNF2 3 When 5 min...

Page 56: ... square indicates a switch position Diagnosis of failure Connect the wiring connector properly Replace the connector in the case of breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Check the wiring and connector connection of TH4 Disconnect the connector to check the resis ta...

Page 57: ...ates a switch position Diagnosis of failure Connect the wiring connector properly Replace it in the case of breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Check the wiring and connector connection of TH6 Disconnect the connector to check the resis tance of TH6 using a multi...

Page 58: ...witch position Diagnosis of failure Connect the wiring connector properly Replace it in the case of breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Check the wiring and connector connection of TH3 Disconnect the connector to check the resis tance of TH3 using a multimeter Ch...

Page 59: ...reakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Check the wiring and connector connection of TH7 Disconnect the connector to check the resis tance of TH7 using a multimeter Check the temperature of TH7 The detected temperature of TH7 can be displayed by an operation of SW1 on...

Page 60: ...breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Check the wiring and connector connection of TH2 Disconnect the connector to check the resis tance of TH2 using a multimeter Check the temperature of TH2 The detected temperature of TH2 can be displayed by an operation of SW1 o...

Page 61: ...or properly Replace it in the case of breakage Replace the thermistor Replace the outdoor multi controller circuit board Malfunction of thermistor circuit No abnormality A connector contact failure is suspected Check the wiring and connector connection of TH8 Disconnect the connector to check the resis tance of TH8 using a multimeter Check the temperature of TH8 The detected temperature of TH8 can...

Page 62: ...tor Malfunction of input circuit on outdoor multi controller circuit board The black square indicates a switch position Diagnosis of failure Connect the wiring connector properly Replace it in the case of breakage Check the refrigerant circuit and recharge refrigerant after repairing the leakage Replace the 63HS Replace the outdoor multi controller circuit board Check the wiring and connector conn...

Page 63: ... multi controller circuit board The black square indicates a switch position Diagnosis of failure Connect the wiring connector properly Replace it in the case of breakage Check the refrigerant circuit and refill refrigerant after repairing the leakage Replace the 63LS Replace the outdoor multi controller circuit board Check the wiring and connector connection Check the internal pressure of the ref...

Page 64: ...1 Model Error detecting condition 1 phase model 34 A or more for 10 consecutive seconds or 38 A or more The power supply voltage is decreased or abnormal Check the power supply facility Connect the compressor wiring properly Replace the outdoor power circuit board Malfunction of current sensor circuit Check the input current at the time of abnormal stop Check the compressor wiring for disconnectio...

Page 65: ...of failure Correct the address and turn the power OFF of indoor outdoor unit Fresh Master or Lossnay simultaneously for 2 minutes or more then turn the power back ON Malfunction of sending receiving circuit on indoor outdoor unit is suspected There is no abnormality on the AC unit It might be caused by an external noise so check the transmission line to remove the factor s Search for a unit with t...

Page 66: ...transmitting circuit on transmission pro cessor Noise interference on indoor outdoor connectors Diagnosis of failure If the wiring work was performed while the power was ON turn the power OFF of indoor outdoor unit Fresh Master or Lossnay simultaneously for 2 minutes or more then turn the power back ON Replace the indoor outdoor controller board There is no abnormality on the AC unit It might be c...

Page 67: ...eater on the outdoor unit which is a function to connect dis connect transmission from to control system and cen tralized control system Diagnosis of failure Correct the wiring then turn the power back ON Correct the wiring then turn the power back ON Replace the indoor outdoor controller board There is no abnormality on the AC unit It might be caused by an external noise so check the transmission...

Page 68: ...dental disturbance such as noise or lightning surge Hardware malfunction of transmission processor Diagnosis of failure Replace the controller Defect of error source controller There is no abnormality on the AC unit It might be caused by an external noise so check the transmission line to remove the factor s Turn the power OFF of indoor outdoor unit Fresh Master Lossnay and remote controller simul...

Page 69: ...e indoor unit While operating with the indoor units in a different refrig erant system an abnormality is detected when the in door unit transmits signal to the remote controller during the other refrigerant system outdoor unit is turned OFF or within 2 minutes after it turned back ON Contact failure of indoor unit or remote controller trans mission line Disconnection of transmission connector CN2M...

Page 70: ... to the Lossnay while the outdoor unit in the same refrigerant system as the Lossnay is turned OFF or within 2 minutes after it turned back ON Contact failure of indoor unit or Lossnay transmission line Disconnection of transmission connector CN2M on indoor unit Malfunction of sending receiving circuit on indoor unit or Lossnay The displayed address attribute is not assigned to any controller The ...

Page 71: ... the AC unit It might be caused by an external noise so check the transmission line to remove the factor s Set the address properly then perform the procedure 1 Refer to the diagnosis of check code 1302 High pressure trouble Check the address switch on the source of abnormality Check the transmission line for disconnection and looseness on the terminal board and connector Turn the power OFF of ind...

Page 72: ... unnecessary address using a manual setting function on the remote controller Only for the system to which the Fresh Master Lossnay is connected or the system in which a group setting involving different refrigerant systems is made When operating in a single refrigerant system single indoor unit the controller of the dis played address attribute is defective Apply the correct kind of transmission ...

Page 73: ...2 AWG 16 or more Accidental malfunction of error source controller Diagnosis of failure Replace the controller board Defect of the controller which the displayed address attribute belong to Connect the transmission line properly Correct it within the limits Replace it with the correct kind of transmission line There is no abnormality on the AC unit Check the transmission line for transmission wave...

Page 74: ...g Malfunction of the remote controller sending receiving circuit Remote controller transmitting error caused by noise interference Diagnosis of failure Check the remote controller for main sub setting Conduct the remote controller diagno sis twice or more times Turn the power back ON No abnormality It might be caused by an external noise so check the transmission line Yes Set 1 remote controller t...

Page 75: ...ed by an external noise so check the transmission line to remove the factor s Connect the wiring properly as specified in the chapter Electrical Work in the indoor unit Installation Manual Refer to the chapter Electrical Work Continued from the previous page Is the wiring connected properly and meeting the conditions Yes No ...

Page 76: ...ontroller to main remote controller and the other to sub Disconnect and reconnect the connector CN3A then turn the power back ON Note It takes 6 seconds at maximum until the result is displayed No abnormality A connector or wiring contact failure is suspect ed Continue to the next page Turn the power back ON No abnormality It might be caused by an external noise so check the transmission line Repl...

Page 77: ... by an external noise so check the transmission line to remove the factor s Connect the wiring properly as specified in the chapter Electrical Work in the indoor unit Installation Manual Refer to the chapter Electrical Work Continued from the previous page Yes No Is the wiring connected properly and meeting the conditions ...

Page 78: ...hes of the out door unit is registered wrongly Diagnosis of failure Check the capacity code switch SW2 on the indoor controller board on the connected indoor unit Check the model selection switch SW4 on the outdoor multi controller circuit board of the outdoor unit Check the total capacity of connected indoor units Correct it so that the total capacity of connected indoor units is under 130 of the...

Page 79: ...le indoor units are P112 to P140 model P10 to P140 model capacity code 2 to 28 When connecting via branch box P15 to P100 model capacity code 4 to 20 PWFY unit P100 model capacity code 20 Diagnosis of failure Set the switch properly The capacity code of the connected indoor unit can be displayed by an operation of SW1 on the outdoor unit Check the model selection switch SW4 on the indoor controlle...

Page 80: ...p to 1 Air to Water unit PWFY unit Cylin der Unit or Hydrobox When connecting PWFY unit Cylinder Unit or Hyd robox connect at least 1 indoor unit other than Air to Water unit Connectable up to 1 PEFY P VMH E F Diagnosis of failure Connect an indoor unit Reduce the number of the connected units to fall within the limit The capacity code of the connected indoor unit can be displayed by an operation ...

Page 81: ...set in 00 or in the range of 01 to 50 Branch box Set the address properly then turn the power OFF of indoor outdoor unit Fresh Master Lossnay and remote controller simultaneously for 2 minutes or more and turn the power back ON Replace the branch box controller board Check whether the branch box address is set in 00 or in the range of 01 to 46 Set the address properly then turn the power OFF of in...

Page 82: ...k ON Replace the M NET RC sub Check whether the M NET RC sub address is set in 000 or in the range of 151 to 200 Set the address properly then turn the power OFF of indoor outdoor unit Fresh Master Lossnay and remote controller simultaneously for 2 minutes or more and turn the power back ON Replace the M NET RC main Check whether the M NET RC main address is set in 000 or in the range of 101 to 15...

Page 83: ...zed to con nect to the outdoor unit Diagnosis of failure Replace the indoor unit s to the connectable one Refer to the service manual of the outdoor unit or the connected indoor unit for the authorized combination Set the model selection switches correctly then restart Replace the outdoor multi controller circuit board Is the indoor unit authorized to connect with the outdoor unit Check whether th...

Page 84: ...nected to MA remote controller cable The transmission line of the indoor outdoor unit is short ed or down M NET remote controller cable is shorted or down Transmission outdoor power board failure Startup screen keeps being displayed or it is displayed periodically Startup screen is usually displayed about 3 minutes after the power supply of the outdoor unit is on The power supply for the feeding e...

Page 85: ...cted to TB15 MA remote controller is connected to the transmission line of the indoor outdoor unit The remote controller cable is shorted or down The power supply cable or the transmission line is shorted or down The fuse on the indoor unit controller board is blown Please Wait keeps being displayed or it is displayed peri odically Please Wait is usually displayed for 3 minutes after the power sup...

Page 86: ...d on Display Heat Standby Ultra low speed operation for 5 minutes after SW ON or until piping temperature reaches 35 C 95 F Then low speed operates for 2 minutes and operates at the normal set air volume Hot adjust control Indoor unit remote controller shows Please Wait indicator for about 2 minutes when turning ON power supply Display Please Wait blinks The system is in the process of startup Ope...

Page 87: ...F 2 The black square indicates a switch position Bit Function Operation in each switch setting ON OFF When to set 1 ON OFF from outdoor unit 1 Activated Deactivated Any time after the power is turned ON 2 Mode setting Heating Cooling 1 Test run on PWFY series cannot be run by the outdoor unit Use a switch on the indoor unit or a remote controller to perform test run SW4 SW8 Model switch Model sele...

Page 88: ...ting the PDm higher during HEAT operation Power consumption increases due to a higher frequency The performance would not increase at the maximum operating frequency 7 Switching 1 the target evaporation tempera ture ETm Activated Deactivated Any time To raise lower the temperature by chang ing the target ETm during COOL opera tion Switch to lower the temperature raises the performance Switch to ra...

Page 89: ...re locally G Max 10m 32 ft L1 Error display lamp L2 Compressor operation lamp X Y Relay coil rating 0 9W DC 12 VDC Auto changeover CN3N 1 3 A E B F G C D CN3N X Y SW1 SW2 1 2 3 Y X A Remote control panel B Relay circuit C External input adapter PAC SC36NA E D Outdoor unit control board E Relay power supply F Procure locally G Max 10 m 32 ft SW1 Switch SW2 Switch X Y Relay contact rating 0 1 A 15 V...

Page 90: ... White Blue Open Solenoid valve coil 4 way valve 21S4 Measure the resistance between the terminals with a multimeter at the ambient temperature 20 C 68 F Normal Abnormal 2085 208 5 Ω Open or short Motor for compressor MC W V U Measure the resistance between the terminals with a multimeter at the ambient temperature 20 C 68 F Model Normal Abnormal PUMY P VKM 0 305 0 015 Ω Open or short PUMY P YKM 0...

Page 91: ...circuit board TEST POINT 1 VDC between 1 and 4 of the fan connector 310 350 V DC three phase VDC between 1 and 4 of the fan connector 310 340 V DC when PAM stops 380 V DC when PAM is operating single phase TEST POINT 2 VCC between 5 and 4 of the fan connector VCC 15 V DC TEST POINT 3 VCC between 6 and 4 of the fan connector VCC 0 6 5 V DC Did the fuse blow Is there contact failure Is the voltage n...

Page 92: ...r TH8 Heat sink Thermistor R50 17 kΩ 2 B constant 4150 3 Rt 17exp 4150 273 t 323 1 1 Temperature Resistance value 0 C 32 F 180 kΩ 25 C 77 F 50 kΩ 50 C 122 F 17 kΩ 70 C 158 F 8 kΩ 90 C 194 F 4 kΩ 200 150 100 50 0 25 50 75 100 125 Resistance kΩ Temperature C 77 122 167 212 257 F High temperature thermistor TH4 Compressor Thermistor R120 7 465 kΩ 2 B constant 4057 2 Rt 7 465exp 4057 273 t 393 1 1 Tem...

Page 93: ...D1 2 does not change the high pressure sensor has a prob lem 3 Remove the high pressure sensor from the control board to check the pressure on the self diagnosis LED1 2 When the pressure displayed on the self diagnosis LED1 2 is between 0 and 0 098 MPaG 14 psig the high pres sure sensor has a problem When the pressure displayed on the self diagnosis LED1 2 is approximately 5 0 MPaG 725 psig the co...

Page 94: ...iagnosis LED1 2 does not change the low pressure sensor has a prob lem 3 Remove the low pressure sensor from the control board to check the pressure with the self diagnosis LED1 2 When the pressure displayed on the self diagnosis LED1 2 is between 0 and 0 098 MPaG 14 psig the low pres sure sensor has a problem When the pressure displayed on the self diagnosis LED1 2 is approximately 1 7 MPaG 247 p...

Page 95: ...15 V DC CNDC 310 340 V DC Y 310 380 V DC V VCC TEST POINT Voltage between pins of C82A 15 V DC Same as CNF1 2 VSP Voltage between pins of C515 and C516 0 V DC when stopped 1 6 5 V DC when operated Same as CNF1 2 CNF1 2 Connect to fan motors 310 340 V DC Y 310 380 V DC V 15 V DC 0 6 5 V DC 15 V DC when stopped 0 15 V DC pulse when operated VFG TEST POINT Voltage between pin3 and pin4 of PC511 or PC...

Page 96: ...ntroller circuit board 0 5 VDC 2 5 Zero cross signal 0 5 VDC 3 4 15 VDC 6 5 15 VDC 7 5 15 VDC CN4 Connect to the out door multi controller circuit board CN4 CN6 Thermistor TH8 CNAC2 220 240 VAC Connect to the out door multi controller circuit board CNAC TB1B TB3B TB2B TB1A TB2A TB3A Connect to DCL El E2 E3 E4 Connect to the electrical parts box Brief Check of POWER MODULE If they are short circuit...

Page 97: ...tage among phases 10 400 V AC TB L1 TB L2 TB L3 Connect to the outdoor noise filter circuit board LO1 LO2 LO3 400 V AC CN4 Connect to the outdoor multi controller circuit board CN4 CN6 Thermistor Heat sink TH8 L3OUT L3IN Lead connect CN5 Detection of primary current Connect to the outdoor noise filter circuit board CNCT DIP IPM If they are short circuited it means that they are broken Measure the ...

Page 98: ...ect to the outdoor noise filter circuit board CNAC1 Y Connect to the outdoor power circuit board CNAC1 V Connect to the electrical parts box CN2 Connect to the outdoor multi controller circuit board CN102 24 30 V DC 24 30 V DC 1 2 3 4 220 240 V AC 1 3 ...

Page 99: ...R SUPPLY LO1 LO2 LO2 LO3 LO3 LO1 400V AC input Connect to the outdoor power circuit board TB L1 TBL2 TB L3 LI1 LI2 LI3 NI POWER SUPPLY LI1 LI2 LI2 LI3 LI3 LI1 400V AC input LI1 NI LI2 NI LI3 NI 230V AC input Connect to the terminal block TB1 El Connect to the electrical parts box CNAC1 230 V AC Connect to the M NET power circuit board CN1 3 1 CNL Connect to the ACL4 CNAC2 230 V AC Connect to the o...

Page 100: ...alities remaining in abnormality delay 8 00010000 Abnormality delay history 1 High pressure abnormality delay Superheat due to low discharge temperature delay Compressor shell tem perature abnormality delay TH4 abnor mality delay TH3 abnor mality delay Outdoor fan rotation frequency abnormality delay TH7 abnor mality delay TH8 abnor mality delay Note Display all abnormalities remaining in abnormal...

Page 101: ... 9 Arms Note Display detected current 41 10010100 Input current of outdoor unit 42 01010100 Thermo ON operating time 0000 9999 unit x10 Note Display cumulative time of thermo ON operation 43 11010100 Total capacity of thermo ON 0 255 Note Display total capacity code of indoor units in thermo ON 44 00110100 Number of indoor units 0 255 Note Display number of connected indoor units 45 10110100 DC bu...

Page 102: ...or unit sensors and thermistors 75 11010010 TH4 Compressor Td data 99 9 999 9 C Note Display detected data of outdoor unit sensors and thermistors 76 00110010 TH6 Suction pipe ET data 77 10110010 TH7 Ambient data 78 01110010 TH3 Outdoor liquid pipe data 80 00001010 TH8 Heat sink data 81 10001010 IC1 TH23 Gas 99 9 999 9 C When indoor unit is not connected it is displayed as 0 Note Display detected ...

Page 103: ... 123 11011110 Target indoor SC SH IC12 124 00111110 IC9 LEV opening pulse abnormality delay 0 2000 pulse Note Display of opening pulse of indoor LEV at time of abnormality delay 125 10111110 IC10 LEV opening pulse abnormality delay 126 01111110 IC11 LEV opening pulse abnormality delay 127 11111110 IC12 LEV opening pulse abnormality delay 128 00000001 Actual frequency of abnormality delay 0 255 Hz ...

Page 104: ...uring heating subcool SC During cooling superheat SH Fixed to 0 during cooling operation Note Display of indoor SC SH data at time of abnormality 156 00111001 IC10 SC SH at time of abnormali ty 157 10111001 IC11 SC SH at time of abnormali ty 158 01111001 IC12 SC SH at time of abnormali ty 159 11111001 IC9 Capacity code 0 255 Notes Display of indoor unit capacity code The No 1 unit will start from ...

Page 105: ...tors and SC SH at time of abnormality 201 10010011 TH4 Compres sor sensor data at time of abnormality 99 9 999 9 C Note Display of data from high pressure sensor all thermistors and SC SH at time of abnormality 202 01010011 TH6 Suction pipe sensor data at time of abnormality 203 11010011 TH3 Outdoor liquid pipe sensor data at time of abnormality 204 00110011 TH8 Heat sink sensor data at time of ab...

Page 106: ...ty delay 237 10110111 IC8 LEV opening pulse abnormality delay 238 01110111 IC6 SC SH at time of abnormali ty delay 99 9 999 9 C During heating subcool SC During cooling superheat SH Fixed to 0 during cooling operation Note Display of indoor SC SH data at time of abnormality delay 239 11110111 IC7 SC SH at time of abnormali ty delay 240 00001111 IC8 SC SH at time of abnormali ty delay 241 10001111 ...

Page 107: ...top panel See Photo 1 3 Remove 4 grille fixing screws 5 12 to detach the fan grille See Photo 1 4 Remove a nut for right handed screw of M6 to detach the propeller See Photo 2 5 Disconnect the connectors CNF1 and CNF2 on outdoor multi controller circuit board in the electrical parts box 6 Remove 4 fan motor fixing screws 5 20 to detach the fan motor See Photo 3 Note Tighten the propeller fan with ...

Page 108: ...l fixing screws 5 x 12 Valve bed fixing screws Cover panel fixing screws Cover panel Rear Photo 5 Electrical parts box Hooks Hook Electrical parts box fixing screws 4 Removing the thermistor Suction pipe TH6 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Disconnect the connectors TH6 and TH7 red on the outdoor multi controller circuit board in the electrical parts box ...

Page 109: ...ing the coil toward you 4 Disconnect the connector 21S4 green on the outdoor multi controller circuit board in the electrical parts box 8 Removing the 4 way valve 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 5 4 Remove 3 valve bed fixing screws 4 10 and 4 ball valve and stop valve fixing screws 5 16 and then remove the valve ...

Page 110: ... 5 5 Remove the cover panel rear Refer to procedure 8 6 6 Remove the side panel R Refer to procedure 8 7 7 Pull out the lead wire of high pressure switch 8 Recover refrigerant 9 Remove the welded part of high pressure switch Notes Recover refrigerant without spreading it in the air The welded part can be removed easily after removing the side panel R When installing the high pressure switch cover ...

Page 111: ...e sensor 63LS Linear expansion valve coil LEV A Linear expansion valve 13 Removing the compressor MC 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 cover panel front fixing screws 5 12 and remove the cover panel front See Photo 4 4 Remove front panel fixing screws 5 5 12 and 2 4 10 and remove the front panel See Photo 4 5 Remove 4 cover panel rear fixing screw...

Page 112: ...r panel rear fixing screws 5 12 and remove the cover panel rear 5 Remove the electrical parts box See Photo 5 6 Remove 3 side panel R fixing screws 5 12 in the rear of the unit and then remove the side panel R 7 Remove 3 side panel R fixing screws 5 12 in the rear of the unit and then remove the side panel R 8 Recover refrigerant 9 Remove 4 welded pipes of accumulator inlets and outlets 10 Remove ...

Page 113: ... M6 to detach the propeller See Photo 2 5 Disconnect the connectors CNF1 and CNF2 on outdoor multi controller circuit board in electrical parts box 6 Remove 4 fan motor fixing screws 5 20 to detach the fan motor See Photo 3 Note Tighten the propeller fan with a torque of 5 7 0 3N m 4 2 0 2 lbf ft Photo 2 Propeller Front panel Nut Photo 3 Fan motor fixing screws Fan motor Fan motor fixing screws 3 ...

Page 114: ... multi controller circuit board in the electrical parts box 4 Loosen the wire clamps on top of the electrical parts box 5 Pull out the thermistor Suction pipe TH6 from the sensor holder Note When replacing thermistor Suction pipe TH6 replace it together with thermistor Ambient TH7 since they are combined together Refer to procedure No 5 to remove thermistor Ambient TH7 Photo 6 Electrical parts box...

Page 115: ...oto 1 3 Remove the electrical parts box See Photo 5 4 Remove 3 valve bed fixing screws 4 10 and 4 ball valve and stop valve fixing screws 5 16 and then remove the valve bed See Photo 4 and 7 5 Remove 2 cover panel fixing screws 5 x 12 then slide the cover panel front upward to remove it The cover panel front is fixed to the cover panel rear with a hook on the rear side See Photo 4 6 Remove the cov...

Page 116: ...edure 8 6 5 Remove the side panel R Refer to procedure 8 7 6 Pull out the lead wire of high pressure switch 7 Remove the electrical parts box See Photo 5 8 Recover refrigerant 9 Remove the welded part of high pressure switch Notes Recover refrigerant without spreading it in the air The welded part can be removed easily after removing the side panel R When installing the high pressure switch cover ...

Page 117: ... are not oxidized Photo 12 Low pressure sensor 63LS Linear expansion valve coil LEV A Linear expansion valve 13 Removing the compressor MC 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 cover panel front fixing screws 5 12 and remove the cover panel front See Photo 4 4 Remove front panel fixing screws 5 5x12 and 2 4 x 10 and remove the front panel See Photo 4 ...

Page 118: ...fixing screws 5 12 and remove the cover panel rear 5 Remove the electrical parts box See Photo 5 6 Remove 3 valve bed fixing screws 4 10 and 4 ball valve and stop valve fixing screws 5 16 and then remove the valve bed See Photo 4 and 7 7 Remove 3 side panel R fixing screw 5 12 in the rear of the unit and then remove the side panel R 8 Recover refrigerant 9 Remove 4 welded pipes of accumulator inle...

Page 119: ...0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 Address SW 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 Address SW SW1 ON 1 2 3 4 5 6 SW1 ON 1 2 3 4 5 6 CITY MULTI Indoor unit 009 CITY MULTI Indoor unit 010 MA remote controller CITY MULTI 001 050 For centralized management 061 Outdoor unit For Branch box CITY MULTI indoor unit 0 1 2 3 4 5 6 7 8 9 Address SW 0 1 2 3 4 5 6 7 8 9 CITY MULTI Indoor unit 011 CITY M...

Page 120: ...Service port Capillary tube Accumulator Strainer High pressure sensor 63H Low pressure sensor 63LS Restrictor valve Refrigerant flow in cooling Refrigerant flow in heating Capillary tube for oil separator ø2 5 ø0 8 L1000 Refrigerant piping specifications dimensions of flared connector Unit mm in Item Capacity Liquid piping Gas piping Indoor unit P10 P15 P20 P25 P32 P40 P50 ø6 35 1 4 ø12 7 1 2 P63 ...

Page 121: ...OCH790 _121 11 ELECTRICAL WIRING Refer to installation manual 6 Electrical work for details ...

Page 122: ...ditional charged amount at field installation Note When the air conditioning system consists of several independent refrigerant system figure out the total refrigerant amount by each independent refrigerant system 2 Calculate room volumes m3 and find the room with the smallest volume The part with represents the room with the smallest volume 2 1 Situation in which there are no partitions Indoor un...

Page 123: ...acklight is off pressing any button except for the ON OFF button turns the backlight on and it will stay lit for a certain period of time depending on the screen 6 ON OFF lamp This lamp lights up in green while the unit is in operation It blinks while the remote controller is starting up or when there is an error F1 Function button 1 Main display Press to change the operation mode Menu screen The ...

Page 124: ...ized control system 14 Appears when the Weekly timer is enabled 15 Appears while the units are operated in the energy saving mode Will not appear on some models of indoor units 16 Appears while the outdoor units are operated in the silent mode 17 Appears when the built in thermistor on the remote controller is activated to monitor the room temperature 11 Appears when the thermistor on the indoor u...

Page 125: ...Maintenance information Filter information Cleaning Settings menu Check menu Other menu Auto descending panel Descending operation Self check Descending adjustment Remote controller check Collect model names and serial No Wi Fi interface setting Main menu list Main menu Setting and display items Setting details Operation Vane 3D i See Vent Vane Vent Lossnay Vane Use to set the vertical air directi...

Page 126: ...Weekly timer setting Restriction setting Outdoor unit silent mode setting Night set back Display setting Main display Use to switch between Full and Basic modes for the Main display and use to change the background colors of the display to black Display details Make the settings for the remote controller related items as necessary Clock The initial settings are Yes and 24h format Temperature Set e...

Page 127: ...roller has been received Signals can be received up to approximately 7 meters in a direct line from the indoor unit in an area 45 to the left and right of the unit However illumination such as fluorescent lights and strong light can affect the ability of the indoor unit to receive sig nals If the operation lamp near the receiver on the indoor unit is blinking the unit needs to be inspected Consult...

Page 128: ...midity Sensor The sensor detects the room temperature and the relative humidity 4 LED Indicator The LED indicator indicates the operation status in different colors The LED indicator lights up during normal operation lights off when units are stopped and blinks when an error occurs 5 Touch panel Backlit LCD The touch panel shows the operation settings screen When the backlight is off touching the ...

Page 129: ... the error information later While no errors are occurring page 2 2 of the error information can be viewed by selecting Error information from the maintenance menu Errors cannot be reset on this screen Main menu Cursor Maintenance menu Error information Filter information Cleaning F1 F2 F3 F4 13 3 Service menu Note Maintenance password is required to set each item in the service menu Operating ins...

Page 130: ...Please stop the unit Notes To go back to the service menu press button To return to the previous screen press button 13 4 Test run 13 4 1 PAR 41MAA Operating instructions 1 Select Service from the Main menu and press the button 2 Select Test run with the F1 or F2 button and press the button u n e m e c i v r e S r o s r u C u n e m n i a M Test run Input maintenance info Settings Check Others F1 F...

Page 131: ...arm air blows out from the unit 5 Press the FAN button and check whether strong air blows out from the unit 6 Press the VANE button and check whether the auto vane operates properly 7 Press the button to stop the test run Notes Point the remote controller towards the indoor unit receiver to perform steps 2 to 7 It is not possible to run in FAN DRY or AUTO mode ON OFF TEMP FAN VANE MODE CHECK LOUVE...

Page 132: ...can be monitored The test run will automatically end in 2 hours Notes When AHC is controlled from the controller To monitor the operating status of AHC touch the button on the Test run screen and access the General equip ment screen To set the humidity setting for the humidifier when one is connected to the AHC touch the button on the Indoor unit setting screen Cool Mode ON 001 Pipe 9 0 C MON 10 4...

Page 133: ...remote controller Function selection using wireless remote controller is avail able only for refrigerant system with wireless function Refrigerant address cannot be specified by the wireless remote controller Operating instructions 1 Press the CHECK button twice continuously CHECK appears and 00 blinks Press the TEMP button once to set the address number to 50 Direct the wireless remote controller...

Page 134: ...use the wireless remote controller for 30 seconds after completing the function setting ON OFF TEMP FAN VANE MODE CHECK LOUVER TEST RUN AUTO STOP AUTO START h min CHECK RESET SET CLOCK ON OFF button Check button Temperature setting buttons Hour button Minute button 13 5 3 PAR SL101A E Operating instructions 1 Go to the function select mode Press the button for 5 seconds Start this operation from t...

Page 135: ... functions if any of the initial settings has been changed after the completion of installation work 13 6 Error history Operating instructions 1 Open the Service menu and select Check Select Service from the main menu and press the button Select Check with the F1 or F2 button and press the button u n e m e c i v r e S r o s r u C u n e m n i a M Test run Input maintenance info Settings Check Other...

Page 136: ...k with the F1 or F2 button and press the button Self check screen will appear Diagnosis Cursor Service menu Self check Remote controller check F1 F2 F3 F4 2 Enter the M NET address with the F1 or F2 button and press the button Check code unit number attribute and indoor unit demand signal ON OFF status at the contact will appear will appear when there is no error history Error histrory is not show...

Page 137: ...operation light blinks and the check code is output It takes 3 seconds at most for check code to appear 4 Point the remote controller at the sensor of the indoor unit and press the button The check mode is cancelled ON OFF TEMP FAN VANE MODE CHECK LOUVER TEST RUN AUTO STOP AUTO START h min RESET SET CLOCK CHECK CHECK display Temperature button CHECK button Refrigerant address display HOUR button O...

Page 138: ...Start the remote controller check Select Remote controller check from the Diagnosis menu and press the button to start the remote controller check and see the check results Notes To cancel the remote controller check and exit the Remote controller check menu screen press the or the button The remote controller will not reboot itself F1 F2 F3 F4 Remote controller check Begin Start checking 3 Check ...

Page 139: ... service screen 4 Setup screen will appear Home Date and time Schedule Timer Night setback Menu 1 2 User Service Home Menu Setup Error menu Test run User Service Back Setup Interlocked LOSSNAY Group setting Search connection information LED Room name Set to Auto Cool Mode ON Menu 26 0 C 17 0 C Room 23 5 C 50 RH MON 12 45 7 Home screen Menu User screen Menu Service screen Setup screen Group setting...

Page 140: ...C 001 Add 1 Add 2 Set Conf Function 013 Del Search connection information Use this screen to specify a unit and search for the controllers that are connected to the unit 1 Select an address in the Address field 2 Touch the Conf button to search for the interlocked units The results will appear in the left column When multiple units are found the addresses that do not fit on the first page will app...

Page 141: ...OCH790 _141 ...

Page 142: ...FICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN Copyright 2022 MITSUBISHI ELECTRIC CORPORATION Published Jun 2022 No OCH790 Made in Japan Specifications are subject to change without notice ...

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