55
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[A6] 1. Outdoor unit service valve closed.
Discharge temperature TD1 and TD2 alarm 2. Cooling bypass PMV error.
(>130°C) 3. TD sensor error.
4. Insufficient refrigerant, blockage in pipe.
5. Blockage of PMV assembly on the liquid line.
Are the gas pipe and liquid pipe
service valves of the outdoor unit
fully open ?
Are PMV 2 and SV13
operating normally?
Is wiring correct ?
Insufficient refrigerant, blockage,
pipe breakage.
Multi Controller blockage.
Open valves fully.
Replace defective part.
Correct wiring.
j
j
j
h
h
h
No
No
No
Ye s
Ye s
Ye s
Are the resistance characteristics
of TD sensor normal ?
Replace TD sensor.
j
h
No
Ye s
Is the cooling bypass
PMV 1 normal ?
Cooling bypass PMV 1 error.
j
h
No
Ye s
(Check miswiring of the outdoor unit according to miswiring check function.)
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