3-93
Check code
Operation cause
[dC]
Oil level detection circuit
leakage detection
1. SV3C valve leakage
2. TK1 sensor resistance value characteristics error
3. Outdoor unit operation in high outside temperature
YES
YES
YES
NO
NO
No leakage
Sensor error
Is it an operation in high
ambient temperature?
(Outside temp. 43˚C or more)
Check interface P.C. board.
Is resistance value
characteristics of TK1
sensor normal?
Is there leakage of SV3C? (
*
1)
Replace SV3C valve.
It is protective stop due to
operation in high ambient
temperature.
Clear the alarm, and start the
operation.
Accumulator
Balancing pipe valve
Oil
tank
SV3C valve
Check joint
Strainer
Strainer
Strainer
SV3A
valve
SV3B
valve
TK1
sensor
Check
valve
Check
valve
Check
valve
Capillary
Capillary
TK2
sensor
Oil
removal
valve
Compressor
Oil
separator
A
( * 1) SV3C valve leakage check procedure
1. Start a trial operation under condition that connector of SV3C is removed.
2. During operation, check temperature at secondary side of SV3C valve (A part in the following figure).
→
If temperature is high, leakage from SV3C valve is considered.
Replace SV3C valve.