Compressor System Sensor Abnormality - Daikin FTXN25KEV1B Service Manual

SiBE041102_A

4.15 Compressor System Sensor Abnormality

H0
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Check the relay harness for the
compressor.
Turn off the power and turn it on
again.
Service Diagnosis
The system checks the DC current before the compressor starts.
The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output
converted to voltage value)
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.
Is the harness broken?
NO
Restart operation
and error displayed
again?
YES
YES
NO
Troubleshooting
Replace the harness.
No problem.
Keep on running.
Replace the outdoor unit
PCB.
(R11712)
71