L9-10-11-12 - Stall Prevention By Inverter Pcb A6P; L9-13-14-15 - Inverter Pcb A3P Output Phase Abnormality; L9-16-17-18 - Inverter Pcb A6P Output Phase - Daikin VRV IV+ Service Manual

2 Troubleshooting
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
2 Check if the refrigerant circuit is clogged. See
circuit" on page 133.
Possible cause: Clogged refrigerant circuit.
3 Perform a check of the inverter PCB A3P. See
PCB" on page 99.
Possible cause: Faulty inverter PCB A3P.
4 Perform a check of
"3.2 Compressor" on page 82.
Possible cause: Faulty compressor M1C.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.85 L9-10-11-12 – Stall prevention by inverter
PCB A6P
Main error code Sub error code
L9 10
11
12
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 Effect
Inverter PCB A6P Unit will stop
detects overcurrent or operating.
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
"4.1 Electrical circuit" on page 130.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
2 Check if the refrigerant circuit is clogged. See
circuit" on page 133.
Possible cause: Clogged refrigerant circuit.
3 Perform a check of the inverter PCB A6P. See
PCB" on page 99.
Possible cause: Faulty inverter PCB A6P.
4 Perform a check of
"3.2 Compressor" on page 82.
Possible cause: Faulty compressor M2C.
Service manual
44
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
"4.2 Refrigerant
"3.8 Inverter
the compressor M1C.
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
"4.2 Refrigerant
"3.8 Inverter
the compressor M2C.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.86 L9-13-14-15 – Inverter PCB A3P output
phase abnormality
Main error code
L9
See 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
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
"4.1 Electrical circuit" on
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
PCB" on page 99.
Possible cause: Faulty inverter PCB A3P.
3 Perform a check
"3.2 Compressor" on
Possible cause: Faulty compressor M1C.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.87 L9-16-17-18 – Inverter PCB A6P output
phase abnormality
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
See
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Sub error code Unit
13 Main
14 Sub 1
15 Sub 2
Effect Reset
Unit will stop Manual reset via user
operating. interface.
page 130.
of the compressor
page 82.
Sub error code Unit
16 Main
17 Sub 1
18 Sub 2
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
"3.8 Inverter
M1C. See