Troubleshooting
SiBE12-908
145
Service Diagnosis
2.26 DC Voltage / DC Current Sensor Abnormality
Remote
Controller Display
H8
Method of
Malfunction
Detection
DC voltage or DC current sensor system abnormality is identified based on the compressor
operation frequency and the input current detected by the product of DC current and DC
voltage.
Malfunction
Decision
Conditions
When the compressor operation frequency is more than 56 Hz (40 class) or 40 Hz (50 class),
and when the input current is less than 0.25 A
(Input current is below 0.5 A)
The unit shuts down when the fault occurs 4 times.
Fault counter is reset to zero if the unit does not stop during accumulated compressor
operation time of 60 minutes after restored from fault conditions.
Supposed
Causes
Defective outdoor unit PCB
Defective current transformer
Troubleshooting
Replace the outdoor unit PCB.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
