Compressor System Sensor Abnormality - Daikin FTX20K(2)V1B Service Manual

SiBE041525F

4.17 Compressor System Sensor Abnormality

H0
Error Code
The system checks the DC current before the compressor starts.
Method of Error
Detection
 The voltage converted from the DC current before compressor start-up is out of the range
Error Decision
Conditions
 The DC voltage before compressor start-up is below 50 V.
 Broken or disconnected harness
Supposed
 Defective outdoor unit PCB
Causes
Troubleshooting
Check the harness for the
compressor.
Turn off the power. Then, turn on
the power to restart the system.
Service Diagnosis
0.5 ~ 4.5 V.
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the harness broken?
NO
Restart operation
and error displayed
again?
YES
YES
NO
Troubleshooting
Replace the harness.
Not a malfunction.
Continue use.
Replace the outdoor unit
PCB (main PCB).
(R22772)
70