Troubleshooting
SiBE12-933_A
196
Service Diagnosis
4.16 DC Voltage / DC Current Sensor Abnormality
Remote
Controller
Display
H8
Method of
Malfunction
Detection
DC voltage or DC current sensor system fault 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 52 Hz
and when the DC current is less than 0.3 A or DC voltage is less than 50V.
If this error repeats 4 times, the system is shut down.
The error counter is reset if this or any other error does not occur during the following 60-
minute compressor running time (total time).
Supposed
Causes
Power transistor defective
Internal wiring broken or in poor contact
Reactor defective
Outdoor unit PCB defective
Refrigerant shortage
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.