Momentary Power Failure During Test Operation - Daikin VRV EMERION REYQ-AATJA Service Manual

Troubleshooting by Error Code

3.55 Momentary Power Failure during Test Operation

Applicable
All outdoor unit models
Models
L2
Error Code
Method of Error
Momentary power failure is detected by the PCB.
Detection
Error Decision
Judgment is made by AC power frequency detection circuit on the outdoor unit main PCB.
Conditions
Supposed
 Defective wiring
Causes  Defective outdoor unit main PCB
Troubleshooting
397
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Error
recurs after
NO
turning OFF the power
and ON again.
YES
Any
disconnection
of connectors, loose
contact or wiring YES
disconnection in the
transmission wirings to the
outdoor unit main
PCB?
NO
SiUS372201EB
Temporary problem
Correct any fault.
Replace the outdoor unit
main PCB (A1P).
Part 6 Service Diagnosis