[Dc] Sv3C Valve Leakage Detection; Sv3C Valve Leakage Check Procedure - Toshiba HFCR407C Service Manual

Check code
[dC]
SV3C valve leakage detection
Is the resistance value
characteristics of TK1 sensor
Is there a leakage of
SV3C valve ? (*1)
Replace SV3C valve.

( *1) SV3C valve leakage check procedure

1. Remove SV3C coil and start a trial operation.
2. During operation, check the temperature at secondary side of SV3C valve (A).
If the temperature is high (equivalent to discharge temperature), leakage from SV3C valve is
considered. Replace SV3C valve.
14
Diagnostic procedure for check code
No
normal ?
Yes
Yes
No leakage
SV3C
Sensor TK1
•
(A)
Capillary
Strainer
Sensor
TK2
Oil tank
Check
Valve
valve
SV3A
Check
valve
Balancing pipe valve
Troubleshooting
Operation cause
1. SV3C valve leakage
2. TK1 sensor resistance value characteristics error
3. Outdoor unit operation in high external temperatures
Is it an operation in high
ambient temperature ?
(Outside temp. 43°C
or more)
No
Check interface PC board.
Check joint
Valve
strainer Capillary
Oil
separator
Strainer
Compressor
Check
Oil
valve
removal
valve
Strainer
114
Sensor error.
The protective stop is due to operation in
Yes
high ambient temperature.
Clear the alarm, and start the operation.
Accumulator
Check
joint
Valve
SV3B
Strainer