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