ESIE15-08B | Part 2. Troubleshooting 2. Error code based troubleshooting19/07/16 Page 29Daikin Altherma Monobloc CA2.22. “E9-00” – Expansion valve abnormality2.23. “F3-00” – Discharge pipe temperature controlFaulty outdoor main PCB. Check if the alive led is blinking in regularintervals.Check if the correct spare part is installed.Check if the outdoor main PCB receivespower.Adjust the power to the outdoor mainPCB.Replace outdoor main PCB when alive ledis not blinking in regular intervals (seepage 119).Faulty or disturbance of the power supply.(Imbalance > 10%) Power drop.Short circuit.Check if the power supply is conform withregulations. No fluctuations in frequency.Adjust power supply when required.Power reset via outdoor unit.Trigger Effect Reset1. No continuity of expansion valve.2. Minimum expansion valve opening andsuction superheat < 4 K and dischargesuperheat < 5 K.Unit will stop operating. Manual reset via user interface (powerreset might be necessary in case no com-mon power supply was cause).Possible cause Check Corrective actionFaulty or disturbance of the power supply.(Imbalance > 10%) Power drop.Short circuit.Check if the power supply is conform withregulations. No fluctuations in frequency.Adjust power supply when required.Power reset via outdoor unit.Faulty expansion valve. Check expansion valve (see page 97). Replace expansion valve when required.Faulty thermistor on outdoor. Check thermistors on outdoor (seepage 70).Replace thermistors when required (seepage 124).Faulty pressure sensor / outdoor mainPCB.Check pressure sensor (see page 94). Replace the pressure sensor (seepage 130) or outdoor main PCB (seepage 119) when required.Wet operation. Check for wet operation. (Wet operationcan be detected by checking the suctionsuperheat. If the suction superheat is 0°Cthen liquid refrigerant is returning to thecompressor.)In case wet operation was detected con-firm the cause:• Refrigerant overcharge.• Faulty expansion valve.External factor (e.g. electrical noise)(cause when error is reset after powerreset, and error happens again afterawhile).Check for source which could cause elec-trical interference.Faulty outdoor main PCB. Check if the alive led is blinking in regularintervals.Check if the correct spare part is installed.Check if the outdoor main PCB receivespower.Adjust the power to the outdoor mainPCB.Replace outdoor main PCB when alive ledis not blinking in regular intervals (seepage 119).Trigger Effect Reset1. Discharge temperature > 110°C for 15minutes.2. Discharge temperature > 125°C.Unit will stop operating. Manual reset via user interface -> onlypossible when below 95°C.Possible cause Check Corrective actionRefrigerant shortage (incorrect charge /leakage blockage).Check for refrigerant shortage (seepage 106).Perform leak test.Repair the leak and charge the correctamount of refrigerant (check nameplate).Faulty thermistor R2T. Check thermistor R2T (see page 88). Replace thermistor R2T when required(see page 124).
