Daikin FVXG25K2V1B, Руководство по обслуживанию

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SiBE061121_A Troubleshooting
Service Diagnosis 71
4.7 Refrigerant Shortage
Error Code
U0
Method of Error
Detection Refrigerant shortage detection I:
Refrigerant shortage is detected by checking the input current value and the compressor
running frequency. If the refrigerant is short, the input current is lower than the normal value.
Refrigerant shortage detection II:
Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of
the outdoor electronic expansion valve. If the refrigerant is short, the discharge pipe
temperature tends to rise.
Refrigerant shortage detection III:
Refrigerant shortage is detected by checking the difference between suction and discharge
temperature.
Error Decision
Conditions Refrigerant shortage detection I:
The following conditions continue for 7 minutes.
<25/35 class, RXG50K3V1B>
Š
Input current × input voltage
≤
A × output fre B
Š
Output frequency > C
<RXG50K2V1B>
Š
Input current
≤
D × output fre E
Š
Output frequency > F
Refrigerant shortage detection II:
The following conditions continue for 80 seconds.
Š
Opening of the outdoor electronic expansion valve
≥
G
Š
Discharge pipe temperature > H × target discharge pipe tempe J
A
(–)
B (W) C (Hz)
25/35 class 640/256 0 55
RXG50K3V1B 2000/256 –181 55
D
(–)
E
(A)
F
(Hz)
RXG50K2V1B 18/1000 0.7 55
G (pulse) H (–) J (°C)
25/35 class 480 128/128 30
RXG50K2V1B 480 128/128 cooling: 20, heating: 45
RXG50K3V1B 480 128/128 cooling: 60, heating: 45