Service Manual

Troubleshooting SiUS091133
131 Service Diagnosis
4.21 DC Voltage / Current Sensor Abnormality (09/12 Class Only)
Remote
Controller
Display
H8
Method of
Malfunction
Detection
DC voltage or DC current sensor abnormality is identified based on the compressor running
frequency and the input current.
Malfunction
Decision
Conditions
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
 Defective outdoor unit PCB
Troubleshooting
Replace the outdoor unit PCB.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.