Daikin VRV IV+ Service Manual page 169

2.3.168 UA-00 – Combination abnormality
2.3.169 UA-03 – Combination abnormality - Mix of R22, R407C and R410A type units detected
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
indoor unit(s) that have power black‑out or malfunctioning PCB. See service
manual of the respective indoor unit for more information.
Possible cause: Power black‑out or malfunctioning PCB on indoor unit(s).
5 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
6 Check the F1‑F2 transmission line between the indoor units and outdoor unit.
See "4.1 Electrical
Possible cause: Faulty or interruption in transmission line between indoor
units and outdoor unit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Combination abnormality. Forced stop.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Change the installation with ONLY R410A type indoor units.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Mix of R22, R407C, R410A
type units detected.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Change the installation with ONLY R410A type indoor units.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
"3.11 Main
4
circuit" [ 356].
Effect
Effect
Forced stop.
2 Troubleshooting
|
4
PCB" [ 290].
Reset
Power reset and only
allowed combination.
Reset
Power reset and only
allowed combination.
Service manual
169