L4-07-19-21 - Fan Inverter Pcb A7P High Fin Temperature; L4-09-10-11 - Inverter Pcb A6P High Fin Temperature - Daikin VRV IV+ Service Manual

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Trigger Effect
Fan inverter PCB Unit will stop
A4P detects high fin operating.
temperature.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Check (by touching) if refrigerant is flowing through the radiant
cooling refrigerant circuit. The radiant cooling refrigerant circuit
should be warm if refrigerant is flowing. If no refrigerant flow,
perform a check of the liquid cooling expansion valve, see
"3.5 Expansion valve" on page 89.
Possible cause: No refrigerant flow through the radiant
cooling refrigerant circuit.
2 Perform a check of the liquid cooling expansion valve. See
"3.5 Expansion valve" on page 89.
Possible cause: Faulty liquid cooling expansion valve.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.78 L4-07-19-21 – Fan inverter PCB A7P high
fin temperature
Main error code Sub error code
L4 07
19
21
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
Fan inverter PCB Unit will stop
A7P detects high fin operating.
temperature.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the outdoor unit fan motor. See
"3.12 Outdoor unit fan motor" on
Possible cause: Faulty outdoor unit fan motor.
2 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.
3 Perform a check of the inverter PCB. See
page 99.
Possible cause: Faulty inverter PCB.
4 Perform a check of the main PCB. See
page 106.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Reset
Manual reset via user
interface.
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
page 115.
"3.8 Inverter PCB" on
"3.9 Main PCB" on
Possible cause: Faulty main PCB.
5 Check that the silicon grease is applied properly on the
radiation fin of the outdoor unit PCB. Adjust if needed.
Possible cause: Silicon grease NOT applied properly on the
radiation fin.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.79 L4-09-10-11 – Inverter PCB A6P high fin
temperature
Main error code Sub error code
L4 09
10
11
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 high fin operating.
temperature.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the outdoor unit fan motor. See
"3.12 Outdoor unit fan motor" on
Possible cause: Faulty outdoor unit fan motor.
2 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.
3 Perform a check of the inverter PCB. See
page 99.
Possible cause: Faulty inverter PCB.
4 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
5 Check that the silicon grease is applied properly on the
radiation fin of the outdoor unit PCB. Adjust if needed.
Possible cause: Silicon grease NOT applied properly on the
radiation fin.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2 Troubleshooting
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
page 115.
"3.8 Inverter PCB" on
"3.9 Main PCB" on
Service manual
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