Compressor Sensor System Abnormality - Daikin RXL-W Series Service Manual

Troubleshooting for Outdoor Unit

7.12 Compressor Sensor System Abnormality

H0
Error Code
Method of Error The system checks the DC current before the compressor starts.
Detection
Error Decision
 The voltage converted from the DC current before compressor start-up is out of the range 0.5 ~
Conditions
 The DC voltage before compressor start-up is below 50 V.
Supposed
 Broken or disconnected harness
Causes  Defective outdoor unit PCB
Troubleshooting
173
4.5 V.
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check the (relay) harness for the
compressor.
Is the harness broken?
NO
Turn off the power. Then, turn on
the power to restart the system.
Restart
operation and error displayed
again?
YES
YES
NO
SiUS092231E
Replace the harness.
Not a malfunction.
Keep observing.
Replace the outdoor unit
PCB (main PCB).
(R24613)
Part 6 Service Diagnosis