L5-03-05-07 - Output Overcurrent Detection On Inverter Pcb A3P; L5-14-15-16 - Output Overcurrent Detection On Inverter Pcb A6P; L8-03-06-07 - Overcurrent On Inverter Pcb A3P Except Start-Up - Daikin VRV IV+ Service Manual

2 Troubleshooting
2.3.80 L5-03-05-07 – Output overcurrent
detection on inverter PCB A3P
Main error code Sub error code
L5 03
05
07
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 to operating.
power transistor.
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.
2.3.81 L5-14-15-16 – Output overcurrent
detection on inverter PCB A6P
Main error code Sub error code
L5 14
15
16
Service manual
42
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
"4.2 Refrigerant
page 133.
page 133.
"3.8 Inverter
the compressor M1C.
Unit
Main
Sub 1
Sub 2
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 A6P
detects overcurrent to
power transistor.
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 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
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
"3.2 Compressor" on
Possible cause: Faulty compressor M2C.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
See
2.3.82 L8-03-06-07 – Overcurrent on inverter
PCB A3P except start-up
Main error code
L8
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.
Effect Reset
Unit will stop Manual reset via user
operating. interface.
page 130.
"4.2 Refrigerant
page 133.
"4.2 Refrigerant circuit" on
of the compressor
page 82.
Sub error code Unit
03 Main
06 Sub 1
07 Sub 2
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
page 133.
"3.8 Inverter
M2C. See