Lc-24-25-26 - Transmission Abnormality Main Pcb; Lc-30-31-32 - Transmission Abnormality Main Pcb - Daikin VRV IV+ Service Manual

2 Troubleshooting
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
No transmission Unit will stop
between main PCB operating.
and fan inverter PCB
A4P.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB or wrong capacity setting.
2 Perform a check of the noise filter PCB A2P. See
filter PCB" on page 110.
Possible cause: Faulty noise filter PCB A2P.
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 the fan inverter PCB A4P. See
inverter PCB" on page 92.
Possible cause: Faulty fan inverter PCB A4P.
5 Check that the bridge connector X4A of the fan inverter PCB is
correctly connected. See "3.6 Fan inverter PCB" on
Possible cause: Open jumper X4A on fan inverter PCB.
6 Check the wiring between the PCB's. See
diagram" on page 146.
Possible cause: Faulty wiring between PCB's.
7 Check if the correct spare part is installed for all PCB's. See
checking procedures of the specific PCB's.
Possible cause: Wrong spare part PCB installed.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.91 LC-24-25-26 – Transmission abnormality
main PCB/fan inverter PCB A7P
Main error code Sub error code
LC 24
25
26
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.
Service manual
46
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Reset
Automatic reset.
"3.9 Main PCB" on
"3.10 Noise
"3.8 Inverter
"3.6 Fan
page 92.
"6.2 Wiring
Unit
Main
Sub 1
Sub 2
Trigger Effect
No transmission Unit will stop
between main PCB operating.
and fan inverter PCB
A7P.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB or wrong capacity setting.
2 Perform a check of the noise filter PCB A2P. See
filter PCB" on page 110.
Possible cause: Faulty noise filter PCB A2P.
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 the noise filter PCB A5P. See
filter PCB" on page 110.
Possible cause: Faulty noise filter PCB A5P.
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 the fan inverter PCB A7P. See
inverter PCB" on page 92.
Possible cause: Faulty fan inverter PCB A7P.
7 Check that the bridge connector X4A of the fan inverter PCB is
correctly connected. See "3.6 Fan inverter PCB" on
Possible cause: Open jumper X4A on fan inverter PCB.
8 Check the wiring between the PCB's. See
diagram" on page 146.
Possible cause: Faulty wiring between PCB's.
9 Check if the correct spare part is installed for all PCB's. See
checking procedures of the specific PCB's.
Possible cause: Wrong spare part PCB installed.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.92 LC-30-31-32 – Transmission abnormality
main PCB/inverter PCB A6P
Main error code Sub error code
LC 30
31
32
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.
Reset
Automatic reset.
"3.9 Main PCB" on
"3.10 Noise
"3.8 Inverter
"3.10 Noise
"3.8 Inverter
"3.6 Fan
page 92.
"6.2 Wiring
Unit
Main
Sub 1
Sub 2
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07