L2-04-05-06 - Power Supply Abnormality During Normal Operation; L4-01-02-03 - Inverter Pcb A3P High Fin Temperature; L4-06-18-20 - Fan Inverter Pcb A4P High Fin Temperature - Daikin VRV IV+ Service Manual

2 Troubleshooting
INFORMATION
Main PCB checks L1‑N on connector X1A for sinus
waveform each time crossing the zero‑line. Interval
between each zero‑crossing is 10 miliseconds when the
power supply is 50 Hz.
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 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
3 Perform a check of the inverter PCB(s). See
PCB" on page 99.
Possible cause: Faulty inverter PCB(s).
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.75 L2-04-05-06 – Power supply abnormality
during normal operation
Main error code Sub error code
L2 04
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
Main PCB detects 50 Unit stops and retries
Hz zero-crossing after guard timer (3
error. minutes) - infinite
cycle.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
INFORMATION
Main PCB checks L1‑N on connector X1A for sinus
waveform each time crossing the zero‑line. Interval
between each zero‑crossing is 10 miliseconds when the
power supply is 50 Hz.
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 Perform a check of the main PCB. See
page 106.
Service manual
40
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
"3.9 Main PCB" on
"3.8 Inverter
Unit
Main
Sub 1
Sub 2
Reset
Automatic reset when
within zero-crossing
interval range.
Power reset at
outdoor unit.
"3.9 Main PCB" on
Possible cause: Faulty main PCB.
3 Perform a check of the inverter PCB(s). See
PCB" on page 99.
Possible cause: Faulty inverter PCB(s).
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.76 L4-01-02-03 – Inverter PCB A3P high fin
temperature
Main error code Sub error code
L4 01
02
03
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 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.
2.3.77 L4-06-18-20 – Fan inverter PCB A4P high
fin temperature
Main error code Sub error code
L4 06
18
20
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.
"3.8 Inverter
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
Unit
Main
Sub 1
Sub 2
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07