L4-00 - Outdoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise; L5-00 - Outdoor Unit: Inverter Instantaneous Overcurrent - Daikin EBLA04E V Series Service Manual

3.3.65 L4-00 – Outdoor unit: Malfunction of inverter radiating fin temperature rise
3.3.66 L5-00 – Outdoor unit: Inverter instantaneous overcurrent
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
Trigger
Radiating fin thermistor
measures a too high
temperature.
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
4
motor" [ 197].
Possible cause: Faulty outdoor unit fan motor.
2 Check if the power supply is compliant with the regulations. See
4
circuit" [ 254].
Possible cause:
▪ Faulty or disturbance of the power supply (power supply MUST be within
range of nominal operating voltage ±4%),
▪ Power drop,
▪ Short circuit.
3 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
4 Wait until the rectifier voltage is below 10 V DC.
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see
electrical hazards" [
5 Check that the thermal interface grease is applied properly on the (PCB or
refrigerant piping) contact surface of the heat sink. Adjust if needed.
Possible cause: Thermal interface grease NOT applied properly on the heat
sink.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
An output overcurrent is
detected by checking the
current that flows in the
inverter DC section.
Effect
Unit will stop operating.
"4.14 Main
4
254].
Effect
Unit will stop operating.
draft – 31/05/2022 15:53
3 | Troubleshooting
Reset
Manual reset via user
interface.
"4.15 Outdoor unit fan
"5.1 Electrical
4
PCB" [ 184].
"To prevent
Reset
Manual reset via user
interface.
Service manual
63