![background image](http://html.mh-extra.com/html/daikin/vrv-iv/vrv-iv_service-manual_502236146.webp)
2
|
Troubleshooting
Service manual
146
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.138 U1-01-05-07 – Reverse phase detection
Main error code
Sub error code
Unit
U1
01
Main
05
Sub 1
07
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.
Trigger
Effect
Reset
Main PCB detects reverse
phase between L1 - L3
phases.
Forced stop.
Power reset at outdoor
unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check the phase sequence on the mains power supply terminal, see "To check
the power supply of the unit" in
356]. Correct if
needed.
Possible cause:
Incorrect phase sequence on mains power supply terminal.
2
Check if any of the phases is missing on the mains power supply terminal, see
"To check the power supply of the unit" in
356].
Correct if needed.
Possible cause:
Missing phase(s) on mains power supply terminal.
3
Check if the phase L3 is present on the power supply connector X1A on the
main PCB, see "To perform a power check" in
290]. Correct
if needed.
Possible cause:
Missing phase L3 on main PCB power supply connector.
4
Perform a check of the fuses of the main PCB, see
Possible cause:
Blown fuse(s) on main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
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 ...