![background image](http://html.mh-extra.com/html/daikin/vrv-iv/vrv-iv_service-manual_502236152.webp)
2
|
Troubleshooting
Service manual
152
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Trigger
Effect
Reset
Inverter PCB A3P detects
DC voltage cannot reach
or maintain minimum
500 V DC.
Unit will stop operating.
Power reset at outdoor
unit.
No zero cross is detected
by main PCB through at
least 10 seconds.
Abnormal voltage drop is
detected by DC voltage
detection circuit.
Abnormal voltage rise is
detected by over voltage
detection circuit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check if the power supply wiring is correct. See
Possible cause:
Incorrect power supply wiring.
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
Check the wiring between the PCB's. See
385].
Possible cause:
Faulty wiring between PCB's.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.145 U2-22-25-28 – Inverter circuit power supply abnormality - inverter PCB A6P abnormal
voltage
Main error code
Sub error code
Unit
U2
22
Main
25
Sub 1
28
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.
Summary of Contents for VRV IV+
Page 473: ......
Page 474: ......
Page 475: ......
Page 476: ...ESIE18 15B 2020 05 Copyright 2020 Daikin Verantwortung für Energie und Umwelt ...