Service Manual

SiUS071735E Troubleshooting
Service Diagnosis 90
4.23 Compressor System Sensor Abnormality
Error Code H0
Method of Error
Detection
The system checks the DC current before the compressor starts.
Error Decision
Conditions
 The voltage converted from the DC current before compressor start-up is out of the range 0.5 ~
4.5 V.
 The DC voltage before compressor start-up is below 50 V.
Supposed
Causes
 Broken or disconnected harness
 Defective outdoor unit PCB
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
(R24613)
YES
Turn off the power. Then, turn on
the power to restart the system.
YES
NO
Replace the harness.
Replace the outdoor unit
PCB (main PCB).
Is the harness broken?
Restart operation
and error displayed
again?
Check the (relay) harness for the
compressor.
Not a malfunction.
Keep observing.