Malfunction In Communication System Of Outdoor Unit - Daikin EBLA04E V Series Service Manual

3 | Troubleshooting
3.3.69 LC-00 – Malfunction in communication system of outdoor unit
Service manual
66
draft – 31/05/2022 15:53
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.
4 Check that all stop valves of the refrigerant circuit are open. See
"5.2 Refrigerant circuit" [
Possible cause: Closed stop valve in the refrigerant circuit.
5 Check if the refrigerant circuit is clogged. See
Possible cause: Clogged refrigerant circuit.
6 Check if the refrigerant circuit is correctly charged. See
circuit" [ 4 256].
Possible cause: Refrigerant overcharge or shortage.
7 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See
Possible cause: Non‑condensables and/or humidity in the refrigerant circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Malfunction in
communication system
inside the unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
2 Perform a check of the outdoor unit fan motor. See
4
motor" [ 197].
Possible cause: Faulty outdoor unit fan motor.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
"4.14 Main
4 256].
"5.2 Refrigerant
4
"5.2 Refrigerant circuit" [
Effect
Unit will stop operating.
"4.14 Main
"5.1 Electrical
4
PCB" [ 184].
4
circuit" [ 256].
"5.2 Refrigerant
256].
Reset
Manual reset.
4
PCB" [ 184].
"4.15 Outdoor unit fan
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05