Low-Voltage Detection Or Over-Voltage Detection - Daikin ARXG35E3V1B Service Manual

SiBE04-809
4.26 Low-voltage Detection
U2
Remote
Controller
Display
Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage
Malfunction detection circuit.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Service Diagnosis
An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer
(The voltage is over 400V).
The system will be shut down if the error occurs 255 times.
Clearing condition: Continuous run for about 10 minutes (normal)
Supply voltage not as specified
Over-voltage detector or DC voltage detection circuit defective
PAM control part(s) defective
Short circuit inside the fan motor winding.
or Over-voltage Detection
Troubleshooting
113