Specifications

SiBE01-829 Troubleshooting
Service Diagnosis 65
4.8 Insufficient Gas
Remote
Controller
Display
U0
Method of
Malfunction
Detection
A gas shortage is detected by checking the indoor unit heat exchanger temperature.
Malfunction
Decision
Conditions
When the compressor operates for 30 min. with the indoor heat exchanger temperature is °C
and then, check for 5 more min. before determining insufficient gas and system down.
Supposed
Causes

Refrigerant shortage (refrigerant leakage)

Poor compression performance of compressor

Indoor heat exchanger thermistor disconnected

Stop valve closed