Hisense Hi-Therma Series Service Handbook page 363

Air-to-water heat pump, split/integra outdoor unit, split indoor unit, integra indoor unit, monobloc

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Table of Contents

Troubleshooting

● Alarm code is displayed on the master controller/ the 7-segment of O.U. display PCB / the 7-segment of I.U. PCB1.

★ When either insufficient voltage or overvoltage is detected on the inverter three times in 30 minutes, the operation

stops and this alarm code is displayed. If this occurs less than three times in 30 minutes, the operation is automatically

Does LED2 on O.U. main

PCB ON after operation?

Is connection correctly between

O.U. main PCB and DCL?

Failure of O.U. main PCB.

Replace electrical box.

(Insufficient Inverter Voltage or Overvoltage)

Abnormal Inverter Voltage

Failure of O.U. main PCB.

Troubleshooting