SiUS39-602 Troubleshooting by Indication on the Remote ControllerTroubleshooting 1712.39 “P1” Outdoor Unit: Inverter Over-Ripple ProtectionRemote ControllerDisplayP1Applicable Models REYQ72M, 96MMethod ofMalfunctionDetectionImbalance in supply voltage is detected in PC board.MalfunctionDecisionConditionsWhen the resistance value of thermistor becomes a value equivalent to open or short circuited status. Malfunction is not decided while the unit operation is continued."P1" will be displayed by pressing the inspection button.SupposedCauses Open phase Voltage imbalance between phases Defect of main circuit capacitor Defect of inverter PC board Defect of K1M Improper main circuit wiringTroubleshooting(V2816)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Isthe voltageimbalance applied to theinverter in excess of10 V (TJU)?∗2NOPart or wiring defectAfter turning the power supplyOFF, check and repair themain circuit wiring or parts.(1) Loose or disconnectedwiring between powersupply and inverter(2) K1M contact disposition,fusion or contact is poor.(3) Loose or disconnectednoise filterUsing a device capable ofconstant recording of powersupply voltage recordpower supply voltagebetween 3 phases (L1 ~ L2,L2 ~ L3, L3~L1) for aboutone continuous week.Open phaseNormalize field cause.Power supply voltage imbalanceExplanation for usersFix power supply voltageimbalance.YESYESNOImbalancein supplied voltage isin excess of 10 V(TJU). ∗1Open phase?∗1. Measure voltage at the X1M power supplyterminal block.∗2. Measure voltage at terminals L1, L2 and L3 ofthe diode module inside the inverter while thecompressor is running.∗In accordance with "notification of inspection results" accompanying spare parts.Give the user a copy of "notification of inspection results"and leaveit up to him to improve the imbalance.Be sure to explain to the user thatthere is a "power supply imbalance"for which DAIKIN is not responsible.measureYESNO
