Troubleshooting (Inverter) Si-95120 Troubleshooting Inverter K Series4.6 Power Supply Insufficient or Instantaneous FailureRemote ControllerDisplayUUUU2222Supposed Causes Power supply insufficient Instantaneous power failure Lack of phase Defect of inverter unit Defect of outdoor PC board Defect of K1M. Main circuit wiring defectTroubleshooting(VF068)Replace K1M.NOTurn on again.Replace the outdoor unit PC board.YESTurn K1M ON. YESNOIs 220 ~ 240 V of powerreaching the K1Mcoil?Is 220 ~ 240 V atthe connector of X1A.Replace the inverter unit.Replace the inverter unit.YESNOYESDoesthe voltagebetween terminals Pand N gradually rise to 339VDC (Y1) afterturning on?"U2" blinks again.Monitor field power supply.The voltagebetween the P and Nterminals is 320 VDC (Y1)or more when thecompressoris running.NONOIs 220 ~ 240 V of outdoorPC board side?Checkthe transmissionwiring between the outdoorunit PC board andinverter unit.YESSI-95.BOOK Page 120 Friday, March 31, 2000 10:59 AM
