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Diagnostic Procedure for Check Code
Check code
[dC]
Oil level detection circuit
leakage detection
Is the resistance value
characteristics of TK1
sensor normal?
Yes
Is there a leakage of
SV3C valve? (*1)
No leakage
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.
TK1 sensor
SV3A
valve
Troubleshooting
1. SV3C valve leakage
2. TK1 sensor resistance value characteristics error
3. Outdoor unit operation in high external
temperatures
No
Is it an operation in high
Yes
ambient temperature? (Outside
temp. 43°C or more)
No
Check interface P .C. board.
SV3C
Valve
strainer
Oil
separator
(A)
Capillary
Strainer
TK2
sensor
Compressor
Oil
tank
Check
Oil
valve
removal
valve
Check
valve
Balancing pipe valve
93
Operation cause
The protective stop is due to
operation in high ambient
Yes
temperature.
Clear the alarm, and start the
operation.
Check joint
Capillary
Strainer
Accumulator
Check
joint
Check
SV3B
valve
valve
Strainer
Strainer
Sensor error.
14
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