Troubleshooting by Indication on the Remote Controller SiBE31-801_C289 TroubleshootingTroubleshootingCautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.YES Open phaseNormalize field cause.Imbalance insupplied voltage isin excess of 14 V(Y1). ∗1Is the voltageimbalance appliedto the inverter inexcess of 14 V(Y1)? ∗2YESNONONo abnormalities areobserved in the powersupply, but the imbalancein voltage recurs.Power supply voltage imbalance.Even if the power supply voltage is notunbalanced when measuring it, there aremany cases where it gets unbalanced duringnighttime (around 6:00PM to 10:00PM).Using a device capable ofconstant recording of powersupply voltage record powersupply voltage between 3phases (L1 ~ L2, L2 ~ L3,L3 ~ L1) for about onecontinuous week.Open phase?NOYESFix power supply voltageimbalance.Part or wiring defectAfter turning the power supplyOFF, check and repair themain circuit wiring or parts.(1) Loose or disconnectedwiring between powersupply and inverter(2) K2 contact disposition,fusion or contact is poor.(3) Loose or disconnectednoise filter∗1. Measure voltage at the X1M power supplyterminal block.∗2. Measure voltage at connector R · S · T pins ofthe diode module inside the inverter PCB whilethe compressor is running.Replace the inverter PCB.measureExplanation for users ∗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.
