L8-11-12-13 - Overcurrent On Inverter Pcb A6P Except Start-Up; L9-01-05-06 - Stall Prevention By Inverter Pcb A3P - Daikin VRV IV+ Service Manual

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Trigger Effect
Inverter PCB A3P Unit will stop
detects overcurrent to operating.
compressor except
on 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 Check that all stop valves of the refrigerant circuit are open.
See "4.2 Refrigerant circuit" on
Possible cause: Closed stop valve in the refrigerant circuit.
4 Check for the presence of non‑condensables and/or humidity in
the refrigerant circuit. See "4.2 Refrigerant circuit" on
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
5 Perform a check of the inverter PCB A3P. See
PCB" on page 99.
Possible cause: Faulty inverter PCB A3P.
6 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.
2.3.83 L8-11-12-13 – Overcurrent on inverter
PCB A6P except start-up
Main error code Sub error code
L8 11
12
13
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 to operating.
compressor except
on start‑up.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Reset
Manual reset via user
interface.
"4.2 Refrigerant
page 133.
page 133.
"3.8 Inverter
the compressor M1C. See
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
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 Check that all stop valves of the refrigerant circuit are open.
See "4.2 Refrigerant circuit" on
Possible cause: Closed stop valve in the refrigerant circuit.
4 Check for the presence of non‑condensables and/or humidity in
the refrigerant circuit. See "4.2 Refrigerant circuit" on
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
5 Perform a check of the inverter PCB A6P. See
PCB" on page 99.
Possible cause: Faulty inverter PCB A6P.
6 Perform a check of
"3.2 Compressor" on page 82.
Possible cause: Faulty compressor M2C.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.84 L9-01-05-06 – Stall prevention by inverter
PCB A3P
Main error code Sub error code
L9 01
05
06
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 A3P 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.
2 Troubleshooting
"4.2 Refrigerant
page 133.
page 133.
"3.8 Inverter
the compressor M2C. See
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
Service manual
43