P00181
Carrier Transicold
Warning
Check SV4 Valve
Failure in the circuit of solenoid valve SV4 (Hot Gas/Bypass Valve).
Possible causes
- Defective SV4 coil
- Open circuit in harness
- Power supply issue from controller
Recommended actions
- Verify SV4 coil ohms
- Check for 12V when activated
- Replace solenoid as necessary
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