ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting4/04/17 | Version 1.1 Page 23RA R32 Split & multi split M-Series2.2.1.5. “C4-00” – Liquid pipe thermistor for heat exchanger abnormalityMore info:2.2.1.6. “C7-00” – Front panel open/close fault2.2.1.7. “C9-00” – Suction air thermistor abnormalityTrigger Effect ResetThermistor input is > 4.96 V or < 0.04 Vduring compressor operation.Unit will stop operating. Power reset via outdoor unit.Possible cause Check Corrective actionFaulty liquid pipe thermistor. Check liquid pipe thermistor. Replace liquid pipe thermistor whenrequired.Faulty indoor unit main PCB. Check if error still occurs after turning offpower and turning it back on again.Check if the indoor PCB receives power.Check if the HAP LED is blinking in regu-lar intervals.Check if the correct spare part is installed.Check the wiring to indoor PCB.Adjust the power to the indoor main PCB.Replace indoor main PCB when HAP LEDis not blinking in regular intervals.Check procedures Replacing procedures"Refrigerant thermistors" on page 56Trigger Effect ResetShutter limit switch not activated or faulty. Unit will stop operating when error occurs2 times.Power reset via outdoor unit.Possible cause Check Corrective actionForeign substance in the blow port. Check blow port for foreign material. Remove foreign material when required.Faulty shutter limit switch. Check the limit switch continuity. Replace the limit switch when continuity isnot good.Faulty wire harness. Check the wire harness wiring.Check the wire harness connection.Reconnect wire harness when required.Perform a power reset, if shutter valvedoes not close after power reset, replacewire harness.Faulty shutter motor. Check if motor operates after opening theshutter and power reset.Replace indoor unit main PCB whenrequired.Faulty shutter sealing. Check if shutter goes back open automat-ically after closing.Replace sealing material when required.Shutter is deformed. Check if the error is still active after clos-ing the shutter.Replace shutter panel when required.Trigger Effect ResetResistance value is out of range.T measured < -43.6°C or > 90°C.Unit will stop operating. Automatic reset when resistance is withinrange.
