Mitsubishi PUMY-P100YHM Technical & Service Manual page 35

9-1-3. Countermeasures for Error During Test Run
• If a problems occurs during test run, a code number will appear in the temperature display area on the remote controller
(or LED on the outdoor unit), and the air conditioning system will automatically cease operating.
Determine the nature of the abnormality and apply corrective measures.
Check code
Serial transmission trouble
0403
1102 Discharge temperature trouble
1300 Low Pressure trouble
1302 High pressure trouble
1500 Excessive refrigerant replenishment
1501 Insufficient refrigerant trouble
1505 Vacuum operation protection
Water leakage
2500
2502 Drain pump trouble
2503 Drain sensor trouble (THd)
4100 Overcurrent trouble (Overload, compressor lock)
4115 Power synchronization signal trouble
4220
Inverter trouble
4230 Overheat protection of radiator panel
4250 Power module trouble or Overcurrent trouble
4400
Fan controller trouble (Outdoor)
Air inlet sensor trouble (TH21) or
5101
Discharge temperature sensor trouble (TH4)
Liquid pipe temp.sensor trouble (TH22) or
5102
Low pressure saturated temp.sensor trouble (TH6)
Gas pipe temperature sensor trouble (TH23)
5103
5105 Piping temperature sensor trouble (TH3)
5106 Outdoor temperature sensor trouble (TH7)
5110 Heatsink temperature sensor trouble (TH8)
5201
Pressure sensor trouble (63HS)
5300 Curnent sensor trouble
5701 Contact failure of drain float switch
6600
Dupricated unit address setting
Transmission error
6602
(Transmission processor hardware error)
6603
Transmission error (Transmission route BUSY)
Transmission and reception error
6606
(Communication trouble with transmission processor)
6607
Transmission and reception error (No ACK error)
Transmission and reception error
6608
(No responsive frame error)
MA communication receive signal error
6831
(no receive signal)
MA commnication send signal error
6832
(starting bit derection error)
6833 MA commnication send error (H/W error)
MA commnication receive error
6834
(Synchronous recovery error)
7100 Total capacity error
7101
Capacity code error
7102
Connecting unit number error
7105 Address set error
7111
Remote controller sensor trouble
NOTE )
When the outdoor unit detects No ACK error/ No responsive frame error, an object indoor unit is treated
as a stop, and not assumed to be abnormal.
Self-diagnosis function
The indoor and outdoor units can be diagnosed automatically using the self-diagnosis switch
(SW1) and LED1, LED2 (LED indication) found on the multi-controller of the outdoor unit.
LED indication : Set all contacts of SW1 to OFF.
During normal operation
The LED indicates the drive state of the controller in the outdoor unit.
Bit 1
Compressor
Indication 52C
operated
Trouble
2 3 4
21S4 SV1
Detected unit
Remote
Indoor Outdoor
controller
5 6 7
(SV2) — —
35
Remarks
Outdoor unit Multi controller board ~
Power board communiation trouble
Check delay code 1202
Check delay code 1400
Check delay code 1402
Check delay code 1600
Check delay code 1601
Check delay code 4350
Check delay code 4165
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 1214
Check delay code 1402
Check delay code 4310
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.
[Example]
When the compressor and
SV1 are turned during cooling
operation.
1 2 3 4 5 6 7 8
8
Always lit