Power Supply Voltage Imbalance - Daikin VRV RXYQ72-384XAYCA Service Manual

Troubleshooting by Error Code

3.55 Power Supply Voltage Imbalance

Applicable
All outdoor unit models
Models
P1
Error Code
Method of Error
Detect voltage imbalance through inverter PCB.
Detection
Error Decision
When power supply voltage imbalance exceeds approximately 12 V.
Conditions
Error is not decided while the unit operation is continued.
P1 will be displayed by pressing the inspection button.
Supposed
 Open phase
Causes  Interphase voltage imbalance
 Defective capacitor in the main circuit
 Defective inverter PCB
 Defective magnetic relay
 Defective wiring in the main circuit
319
SiUS342004EB
Part 6 Service Diagnosis