Mitsubishi Electric PUMY-P200YKM, Technical & Service Manual

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31
8-1-3. 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.
Determine the nature of the abnormality and apply corrective measures.
1 2 3 4 5 6 7 8
[Example]
When the compressor and
SV1 are turned during cooling
operation.
Bit
Indication
1
Compressor
operated
2
52C
3
21S4
4
SV1
5
(SV2)
6
—
7
—
8
Always lit
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 outdoor multi controller circuit board.
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.
Check
code
Trouble
Detected Unit
Remarks
Indoor Outdoor
Remote
Controller
0403 Serial communication error
Outdoor multi controller circuit board –
Power circuit board communication trouble
1102 Compressor temperature Check delay code 1202
1302 High pressure Check delay code 1402
1500 Superheat due to low discharge temperature Check delay code 1600
1501
Refrigerant shortage Check delay code 1601
Blocked valve in cooling mode Check delay code 1501
1508 4-way valve trouble in heating mode Check delay code 1608
2500 Water leakage
2502
Drain over flow protection
2503 Drain sensor abnormality
4100 Compressor current interruption (locked compressor)
Check delay code 4350
4210 Compressor overcurrent interruption
4220 Undervoltage/overvoltage/PAM error/L1open phase/power
synchronization signal error
Check delay code 4320
4230 Heat sink temperature Check delay code 4330
4250 Power module Check delay code 4350
4400 Rotational frequency of outdoor fan motor Check delay code 4500
5101
Air inlet thermistor trouble (TH21) or
Compressor temperature thermistor (TH4) open/short
Check delay code 1202
5102
Liquid pipe temperature thermistor trouble (TH22)
Suction pipe temperature thermistor (TH6) open/short
Check delay code 1211
5103 Gas pipe temperature thermistor trouble (TH23)
5105 Outdoor liquid pipe temperature thermistor (TH3) open/short
Check delay code 1205
5106 Ambient thermistor (TH7) open/short Check delay code 1221
5109 HIC pipe temperature thermistor (TH2) open/short Check delay code 1222
5110 Heat sink temperature thermistor (TH8) open/short Check delay code 1214
5201 High pressure sensor (63HS) Check delay code 1402
5202 Low pressure sensor (63LS) Check delay code 1400
5701 Contact failure of drain float switch
6600 Duplex address error Only M-NET Remote controller is detected.
6602 Transmission processor hardware error Only M-NET Remote controller is detected.
6603 Transmission bus BUSY error Only M-NET Remote controller is detected.
6606 Signal communication error with transmission processor Only M-NET Remote controller is detected.
6607 No ACK error Only M-NET Remote controller is detected. *
6608 No response frame error Only M-NET Remote controller is detected. *
6831 MA communication receive error (no receive signal) Only MA Remote controller is detected.
6832 MA communication send error Only MA Remote controller is detected.
6833 MA communication send error Only MA Remote controller is detected.
6834 MA communication receive error Only MA Remote controller is detected.
7100 Total capacity error
7101 Capacity code error
7102 Connecting excessive number of units
7105 Address setting error
Note:
When the outdoor unit detects No ACK error/No response error, an object indoor unit is treated as a stop, and not assumed to be abnormal.
*Abnormality for PWFY series
OCH575