Error Code: P1 - Inverter Over-Ripple Protection - Daikin MicroTech III DPS Installation And Maintenance Manual

ERROR CODE: P1 – Inverter Over-Ripple Protection
P1
Remote
Controller
Display
Imbalance in supply voltage is detected in PC board .
Method of
Malfunction Imbalance in the power supply voltage causes increased ripple of voltage of the main
Detection
circuit capacitor in the inverter. Consequently, the increased ripple is detected.
"P1" will be displayed by pressing the inspection button .
Malfunction
Decision When the amplitude of the ripple exceeding a certain value is detected for consecutive 4
Condition
minutes .
● Open phase
● Voltage imbalance between phases
● Defect of main circuit capacitor
Supposed
Causes
● Defect of inverter PC board
● Defect of K2 relay in inverter PC board
● Improper main circuit wiring
OM 1263 • MICROTECH UNIT CONTROLLER 92
Troubleshooting
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