Daikin VRVII - U1 Reverse Phase, Open Phase

Troubleshooting by Indication on the Remote Controller
259
3.59
U1
Reverse Phase, Open
Phase
Remote Controller Display
U1
Applicable Models
VRVII, III, -WII, -WIII and III-Q Series
Method of Error Detection
The phase of each phase are detected by reverse phase
detection circuit and right phase or reverse phase are
judged.
Error Decision Conditions
When a power supply is reverse phase, or T phase is
open phase.
Supposed Causes
 Power supply reverse phase
 Power supply open phase
 Defective outdoor (outside) unit PCB