1 Troubleshooting
Service manual
19
EBLQ+EDLQ011~W1 + EBLQ+EDLQ011~0W1
+ EK(2)CB EKMB9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
1.4.50
L3-00 – Electrical component temperature
abnormality
Trigger
Effect
Reset
Switch box
temperature is too
high.
Unit will stop
operating.
Manual reset via
remote controller.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1
Perform a check of the inverter PCB. See
.
Possible cause:
Faulty power module = inverter PCB.
2
Perform a check of the outdoor unit fan motor. See
"2.18 Outdoor unit fan motor" on page 73
Possible cause:
Faulty outdoor unit fan motor.
3
Check if the power supply is conform with the regulations. See
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
4
Clean the outdoor heat exchanger. See
.
Possible cause:
Dirty outdoor heat exchanger.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.51
L4-00 – Fin temperature increase
abnormality
Trigger
Effect
Reset
Radiating fin
thermistor measures
a too high
temperature.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1
Perform a check of the outdoor unit fan motor. See
"2.18 Outdoor unit fan motor" on page 73
Possible cause:
Faulty outdoor unit fan motor.
2
Check if the power supply is conform with the regulations. See
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
3
Perform a check of the inverter PCB. See
.
Possible cause:
Faulty power module = inverter PCB.
4
Perform a check of the main PCB. See
.
Possible cause:
Faulty main PCB.
5
Check that the silicon grease is applied properly on the
radiation fin of the outdoor unit PCB. Adjust if needed.
Possible cause:
Silicon grease NOT applied properly on the
radiation fin.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.52
L5-00 – Output over current abnormality
Trigger
Effect
Reset
An output overcurrent
is detected by
checking the current
that flows in the
inverter DC section.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1
Perform a check of the refrigerant circuit. See
Possible cause:
▪ Stop valve is closed,
▪ Clogged refrigerant circuit,
▪ Refrigerant circuit NOT charged correctly,
▪ Humidity in the refrigerant circuit,
▪ Non-condensables in the refrigerant circuit,
▪ Leaking refrigerant circuit.
2
Perform a check of the inverter PCB. See
.
Possible cause:
Faulty power module = inverter PCB.
3
Perform a check of the compressor. See
.
Possible cause:
Faulty compressor.
4
Check if the power supply is conform with the regulations. See
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.53
P4-00 – Fin thermistor abnormality
Trigger
Effect
Reset
Radiating fin
thermistor input is out
of range.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1
Perform a check of the inverter PCB. See
.
