E7-00" - Malfunction Of Outdoor Unit Fan Motor; E8-00" - Power Input Overvoltage - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting
Possible cause
Faulty or disturbance of the power supply.
(Imbalance > 10%) Power drop.
Short circuit.
Faulty compressor.
Faulty expansion valve.
2.20. "E7-00" – Malfunction of outdoor unit fan motor
Trigger
When for 16 times, the fan runs with
speed less than a specified one for 15
seconds or more when the fan motor run-
ning conditions are met.
Possible cause
Faulty fan motor.
Faulty outdoor inverter PCB.
Blowout of fuse.
2.21. "E8-00" – Power input overvoltage
Trigger
System detects overcurrent to compres-
sor of >20A for >2.5 seconds, 16 times in
5 min.
Possible cause
Faulty compressor.
Faulty power transistor
Faulty outdoor inverter PCB.
Page 28
Daikin Altherma Monobloc CA
Check
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Check compressor (see page 91).
Check compressor connection and wiring.
Check expansion valve operation (liquid
back issue).
Check refrigerant charge (see page 106)
+ check for leaks.
After power reset, check if error occurs
when compressor is not running: check
expansion valve (see page 97).
Effect
Unit will stop operating.
Check
Check fan motor (see page 103)
Check fan motor connection and wiring.
Check outdoor inverter PCB (see
page 101).
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Check fuse F6U on outdoor PCB A1P.
Effect
Unit will stop operating.
Check
Check compressor (see page 91).
Check compressor connection and wiring.
Check expansion valve operation (liquid
back issue).
Check refrigerant charge (see page 106)
+ check for leaks.
Check power transistor.
Check outdoor inverter PCB (see
page 101).
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
2. Error code based troubleshooting
Corrective action
Adjust power supply when required.
Power reset via outdoor unit.
Replace the compressor when required.
(see page 125).
Investigate the reason of breakdown.
Replace expansion valve when required
(see page 131).
Fix the possible leak.
Replace expansion valve when required
(see page 131).
Reset
Manual reset via user interface.
Corrective action
Replace fan motor when required. Adjust
wiring when required.
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB when
required (see page 122).
Replace fuse when required.
Reset
Manual reset via user interface.
Corrective action
Replace the compressor when required.
(see page 125).
Investigate the reason of breakdown.
Replace expansion valve when required
(see page 131).
Fix the possible leak.
Replace power transistor when required.
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB when
required (see page 122).
19/07/16