Daikin VRV IV+ Service Manual page 125

2.3.111 L9-16-17-18 – Inverter PCB A6P output phase abnormality
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Trigger
When inverter PCB A3P
detects phase loss to
compressor on U, V, W.
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 Perform a check of the inverter PCB A3P. See
Possible cause: Faulty inverter PCB A3P.
3 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
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
When inverter PCB A6P
detects phase loss to
compressor on U, V, W.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
Effect
Unit will stop operating.
"3.10 Inverter
Sub error code
16
17
18
Effect
Unit will stop operating.
2 Troubleshooting
|
Reset
Manual reset via user
interface.
"4.1 Electrical
4
PCB" [ 274].
4
221].
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
Service manual
125