P1 Outdoor Unit: Inverter Over-Ripple Protection - Daikin RXYQ96PYDN Service Manual

Troubleshooting by Indication on the Remote Controller
P1
3.41 Outdoor Unit: Inverter Over-Ripple Protection
P1
Remote
Controller
Display
Applicable
RXYQ72P~240PYDN, PTJU
Models REYQ72P~240PYDN, PTJU
Method of
Imbalance in supply voltage is detected in PC board.
Malfunction Imbalance in the power supply voltage causes increased ripple of voltage of the main circuit
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
406
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
SiUS34-801A_b
Troubleshooting