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Troubleshooting - Mitsubishi Electric PLFY-P05NFMU-E Technical & Service Manual

Ceiling cassettes r410a.
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8

TROUBLESHOOTING

8-1. COUNTERMEASURES FOR ERROR DURING TEST RUN
If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the
air conditioning system will automatically cease operating.
Refer to the connected outdoor unit service manual in order to determine the nature of the abnormality and apply corrective
measure.
Check
code
0403
Serial communication error
1102
Compressor temperature
1300
Low pressure
1302
High pressure
1500
Superheat due to low discharge temperature
Refrigerant shortage
1501
Closed valve in cooling mode
1508
4-way valve trouble in heating mode
2500
ater leakage
2502
Drain over ow protection
2503
Drain sensor abnormality
4100
Compressor current interruption (locked compressor)
4114
Fan motor error
4210
Compressor overcurrent interruption
Undervoltage/overvoltage/PAM error/L1open phase/power synchronization
4220
signal error
4230
Heat Sink temperature
4250
Power module
4400
Fan trouble
Air inlet thermistor (TH21) open/short
5101
Compressor temperature thermistor (TH4) open/short
Li uid pipe temperature thermistor (TH22) open/short
5102
Suction pipe temperature thermistor (TH6) open/short
5103
Gas pipe temperature thermistor (TH23) open/short
5105
Outdoor li uid pipe temperature thermistor (TH3) open/short
5106
Ambient thermistor (TH ) open/short
510
HIC pipe temperature thermistor (TH2) open/short
5110
Heat Sink temperature thermistor (TH8) open/short
5201
High pressure sensor (63HS)
5202
Low pressure sensor (63LS)
5 01
Contact failure of drain oat switch
6600
Duple address error
6602
Transmission processor hardware error
6603
Transmission bus BUSY error
6606
Signal communication error with transmission processor
660
No AC error
6608
No response frame error
6831
MA communication receive error (no receive signal)
6832
MA communication send error
6833
MA communication send error
6834
MA communication receive error
100
Total capacity error
101
Capacity code error
102
Connecting e cessive number of units
Address setting error
105
Note:
hen the outdoor unit detects No AC error/No response error, an ob ect indoor unit is treated as a stop, and not assumed to be abnormal.
*Abnormality for P FY series
OCH604A
Trouble
Detected Unit
Remote
Indoor
Outdoor
Controller
Outdoor unit Multi controller board ~
Power board communication trouble
Check delay code 1202
Check delay code 1402
Check delay code 1600
Check delay code 1601
Check delay code 1501
Check delay code 1608
Check delay code 4350
Check delay code 4320
Check delay code 4330
Check delay code 4350
Check delay code 4500
Check delay code 1202
Check delay code 1211
Check delay code 1205
Check delay code 1221
Check delay code 1222
Check delay code 1214
Check delay code 1402
Check delay code 1400
Only M-NET Remote controller is detected.
Only M-NET Remote controller is detected.
Only M-NET Remote controller is detected.
Only M-NET Remote controller is detected.
Only M-NET Remote controller is detected. *
Only M-NET Remote controller is detected. *
Only MA Remote controller is detected.
Only MA Remote controller is detected.
Only MA Remote controller is detected.
Only MA Remote controller is detected.
1
Remarks

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