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Troubleshooting
SiEN04-306D
136
Service Diagnosis
4.20 Insufficient Gas
remote control
Display
U0
Method of
Malfunction
Detection
Gas shortage detection I : A gas shortage is detected by checking the CT-detected input current
value and the compressor running frequency.
Gas shortage detection II : A gas shortage is detected by checking the difference between
indoor unit heat exchanger temperature and room temperature as well as the difference
between outdoor unit heat exchanger temperature and room temperature.
Malfunction
Decision
Conditions
Gas shortage detection I :
DC current × DC voltage <
(A/Hz) × Compressor running fre
However, when the status of running frequency > 55 (Hz) is kept on for a certain time.
Note : The values are different from model to model.
Gas shortage detection II :
If a gas shortage error takes place 4 times successively, the system will be shut down. The error
counter will reset itself if this or any other error does not occur during the following 60-minute
compressor running time (total time).
Supposed
Causes
Refrigerant shortage (refrigerant leakage)
Poor compression performance of compressor
Discharge pipe thermistor disconnected, or indoor unit or outdoor unit heat exchanger
thermistor disconnected, room or outside air temperature thermistor disconnected
Stop valve closed
Electronic expansion valve defective
R-410A
1756 / 256
–50
R22
2600 / 256
–300
2YC63
2420 / 256
55
Summary of Contents for ARXS50C2VMB
Page 109: ...Instruction SiEN04 306D 100 System Configuration ...
Page 199: ...Outdoor Unit SiEN04 306D 190 Removal Procedure ...
Page 203: ...Others SiEN04 306D 194 Others ...
Page 214: ...SiEN04 306D Wiring Diagrams Appendix 205 FTKD18 24 28BVMS ...
Page 216: ...SiEN04 306D Wiring Diagrams Appendix 207 RKD18 24 28BVMS ...