SiBE04-101
Troubleshooting
Service Diagnosis
113
4.23
Operation Halt Due to Detection of Insufficient Gas
Remote Controller
Display
U0
Outdoor unit LED
Display
A
5
1
3
2
3
3
4
4
4
Method of
Malfunction
Detection
Detection method 1
Gas shortage is detected by the temperature of the discharge pipe which is detected by the discharge pipe
thermistor and the opening of the electromagnetic valve.
Malfunction
Decision
Conditions
Outdoor air temperature < -5˚C
Discharge pipe temperature > 111˚C
Opening of electromagnetic valve
≥
450 pulses (Full open)
A system shutdown occurs after 4 times.
When a gas shortage malfunction is generated 4 times, the system shuts down. The counter is reset when
there is no operation shutdown due to an error (including operation halt due to other cause) for 60 minutes
(cumulative time) of compressor operation after the error condition is canceled.
Supposed Causes
Insufficient gas due to refrigerant leaks.
Inadequate compression of the compressor.
Abnormal discharge pipe thermistor.
Operation with closing stop valve.
Disconnected or faulty electronic expansion valve.
Piping error.
SiBE04-101.book Page 113 Monday, October 15, 2001 3:08 PM