Service manual

99
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code Operation cause
[dC] 1. SV3C valve leakage
Oil level detection circuit 2. TK1 sensor resistance value characteristics error
leakage detection 3. Outdoor unit operation in high external
temperatures
( *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. R
eplace SV3C valve.
TK1 sensor
TK2
sensor
(A)
Valve
strainer
Oil
separator
Check joint
Strainer
Strainer
Strainer
Strainer
Check
joint
Capillary
Capillary
Accumulator
Compressor
Balancing pipe valve
SV3C
SV3A
valve
SV3B
valve
Check
valve
Oil
removal
valve
Check
valve
Check
valve
Oil
tank
Sensor error.
Is the resistance value
characteristics of TK1
sensor normal?
No
Yes
The protective stop is due to
operation in high ambient
temperature.
Clear the alarm, and start the
operation.
Check interface P.C. board.
Is there a leakage of
SV3C valve? (*1)
Yes
No leakage
Is it an operation in high
ambient temperature? (Outside
temp. 43°C or more)
Yes
No
Replace SV3C valve.