Daikin VRV IV+ Service Manual page 123

2.3.108 L9-01-05-06 – Stall prevention by inverter PCB A3P
2.3.109 L9-10-11-12 – Stall prevention by inverter PCB A6P
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Main error code
L9
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple outdoor unit
configurations. Main outdoor unit is the unit to which F1‑F2 IN transmission line is
connected. Main, Sub 1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger
Inverter PCB A3P detects
overcurrent or no rotation
at start-up.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check if the power supply is conform with the regulations. See
4
circuit" [ 356].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >10%),
▪ Power drop,
▪ Short circuit.
2 Check if the refrigerant circuit is clogged. See
Possible cause: Clogged refrigerant circuit.
3 Perform a check of the inverter PCB A3P. See
Possible cause: Faulty inverter PCB A3P.
4 Perform a check of the compressor M1C. See "3.3 Compressor" [
Possible cause: Faulty compressor M1C.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Main error code
L9
Sub error code
01
05
06
Effect
Unit will stop operating.
"4.2 Refrigerant
"3.10 Inverter
Sub error code
10
11
12
2 Troubleshooting
|
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
"4.1 Electrical
4
circuit" [ 363].
4
PCB" [ 274].
4
221].
Unit
Main
Sub 1
Sub 2
Service manual
123