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Troubleshooting
Service manual
128
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
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
Reset
No transmission between
main PCB and fan inverter
PCB A4P.
Unit will stop operating.
Automatic reset.
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
Possible cause:
Faulty main PCB or wrong capacity setting.
2
Perform a check of the noise filter PCB A2P. See
298].
Possible cause:
Faulty noise filter PCB A2P.
3
Perform a check of the inverter PCB A3P. See
274].
Possible cause:
Faulty inverter PCB A3P.
4
Perform a check of the fan inverter PCB A4P. See
259].
Possible cause:
Faulty fan inverter PCB A4P.
5
Check that the bridge connector X4A of the fan inverter PCB is correctly
connected. See
259].
Possible cause:
Open jumper X4A on fan inverter PCB.
6
Check the wiring between the PCB's. See
385].
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.
2.3.115 LC-24-25-26 – Transmission abnormality main PCB/fan inverter PCB A7P
Main error code
Sub error code
Unit
LC
24
Main
25
Sub 1
26
Sub 2
Summary of Contents for VRV IV+
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Page 476: ...ESIE18 15B 2020 05 Copyright 2020 Daikin Verantwortung für Energie und Umwelt ...