P1 " Outdoor Unit: Inverter Over-Ripple Protection - Daikin VRV III REYQ8PY1 Service Manual

Troubleshooting by Indication on the Remote Controller
P1
3.41 " " Outdoor Unit:
P1
Remote
Controller
Display
Applicable REYQ8P~48P
Models
Method of Imbalance in supply voltage is detected in PC board.
Imbalance in the power supply voltage causes increased ripple of voltage of the main circuit
Malfunction
capacitor in the inverter. Consequently, the increased ripple is detected.
Detection
Malfunction When the resistance value of thermistor becomes a value equivalent to open or short circuited
status.
Decision
★
Conditions
When the amplitude of the ripple exceeding a certain value is detected for consecutive 4
minutes.
Supposed
Causes
298
Inverter Over-Ripple Protection
Malfunction is not decided while the unit operation is continued.
P1
" " will be displayed by pressing the inspection button.
Open phase
Voltage imbalance between phases
Defect of main circuit capacitor
Defect of inverter PC board
Defect of K2 relay in inverter PC board
Improper main circuit wiring
Si37-701
Troubleshooting