115
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[dd] 1. Leakage of PMV assembly on the liquid line
Outdoor PMV refrigerant leakage detection 2. Pd sensor/Ps sensor error
3. Blockage in SV2 valve circuit
4. Blockage in SV3B valve circuit
5. Blockage in capillary of bypass between gas pipe
and heat exchanger line
Is there a blockage in the PMV
assembly on the liquid line ?
Are the characteristics of Pd
sensor/Ps sensor output
voltage normal ?
Is there a blockage in
SV3B valve circuit ?
Check interface PC board.
Replace both the PMVs.
Check connection
(SV2: CN312)
Replace blocked part.
Yes
Yes
No
No
No blockage
Yes
Is there a blockage in
SV2 valve circuit ?
Replace SV2 valve.
Yes
No blockage
Is SV2 valve coil
normally connected ?
Pd sensor/Ps sensor error.
No
Yes
Is there a blockage in the
capillary between the gas
pipe and the heat exchanger
liquid line ?
Yes
No blockage
Replace capillary.
14
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