[Dd] Outdoor Pmv Refrigerant Leakage Detection - Toshiba HFCR407C Service Manual

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