Inverter Over-Ripple Protection - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

SiBE341027

2.26 Inverter Over-Ripple Protection

P1
Remote
Controller
Display
Applicable RQYQ-PY1B
Models
Method of Error Imbalance in supply voltage is detected in PCB.
Detection
Error Decision When the amplitude of the ripple exceeding 6V is detected.
Error is not decided while the unit operation is continued.
Conditions
P1
"
Supposed
Causes
Service Diagnosis
" will be displayed by pressing the inspection button.
Open phase
Voltage imbalance between phases
Defective main circuit capacitor
Defective inverter PCB
Defective K2M relay in inverter PCB
Improper main circuit wiring
Troubleshooting by Remote Controller
145