E9-00" - Expansion Valve Abnormality; F3-00" - Discharge Pipe Temperature Control - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting
Faulty outdoor main PCB.
Faulty or disturbance of the power supply.
(Imbalance > 10%) Power drop.
Short circuit.
2.22. "E9-00" – Expansion valve abnormality
Trigger
1. No continuity of expansion valve.
2. Minimum expansion valve opening and
suction superheat < 4 K and discharge
superheat < 5 K.
Possible cause
Faulty or disturbance of the power supply.
(Imbalance > 10%) Power drop.
Short circuit.
Faulty expansion valve.
Faulty thermistor on outdoor.
Faulty pressure sensor / outdoor main
PCB.
Wet operation.
External factor (e.g. electrical noise)
(cause when error is reset after power
reset, and error happens again after
awhile).
Faulty outdoor main PCB.
2.23. "F3-00" – Discharge pipe temperature control
Trigger
1. Discharge temperature > 110°C for 15
minutes.
2. Discharge temperature > 125°C.
Possible cause
Refrigerant shortage (incorrect charge /
leakage blockage).
Faulty thermistor R2T.
19/07/16
Daikin Altherma Monobloc CA
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Effect
Unit will stop operating.
Check
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Check expansion valve (see page 97).
Check thermistors on outdoor (see
page 70).
Check pressure sensor (see page 94).
Check for wet operation. (Wet operation
can be detected by checking the suction
superheat. If the suction superheat is 0°C
then liquid refrigerant is returning to the
compressor.)
Check for source which could cause elec-
trical interference.
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Effect
Unit will stop operating.
Check
Check for refrigerant shortage (see
page 106).
Perform leak test.
Check thermistor R2T (see page 88).
2. Error code based troubleshooting
Adjust the power to the outdoor main
PCB.
Replace outdoor main PCB when alive led
is not blinking in regular intervals (see
page 119).
Adjust power supply when required.
Power reset via outdoor unit.
Reset
Manual reset via user interface (power
reset might be necessary in case no com-
mon power supply was cause).
Corrective action
Adjust power supply when required.
Power reset via outdoor unit.
Replace expansion valve when required.
Replace thermistors when required (see
page 124).
Replace the pressure sensor (see
page 130) or outdoor main PCB (see
page 119) when required.
In case wet operation was detected con-
firm the cause:
• Refrigerant overcharge.
• Faulty expansion valve.
Adjust the power to the outdoor main
PCB.
Replace outdoor main PCB when alive led
is not blinking in regular intervals (see
page 119).
Reset
Manual reset via user interface -> only
possible when below 95°C.
Corrective action
Repair the leak and charge the correct
amount of refrigerant (check nameplate).
Replace thermistor R2T when required
(see page 124).
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