Compressor System Sensor Abnormality - Daikin FTKN09NMVJU Service Manual

SiUS041501E

4.17 Compressor System Sensor Abnormality

H0
Error Code
Method of Error The system checks the DC current before the compressor starts.
Detection
Error Decision
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
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.
Broken or disconnected harness
Defective outdoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the 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
Troubleshooting
Replace the harness.
No problem.
Keep on running.
Replace the outdoor unit
PCB (main PCB).
(R21670)
82