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Troubleshooting
Service manual
179
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.
2.3.187 UA-39 – Combination abnormality - Incorrect combination
Trigger
Effect
Reset
Main PCB on main
outdoor unit detects
compatibility issues.
Forced stop.
Automatic reset after re-
initialization detects
compatible units.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check for improper combination of units. See the combination table in the
Databook for more information. Change the installation with ONLY compatible
type units.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.188 UA-43 – Combination abnormality - Incorrect combination
Trigger
Effect
Reset
Main PCB on main
outdoor unit detects
compatibility issues.
Forced stop.
Automatic reset after re-
initialization detects
compatible units.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check for improper combination of units. See the combination table in the
Databook for more information. Change the installation with ONLY compatible
type units.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.189 UA-49 – Combination abnormality - Wrong unit combination
Trigger
Effect
Reset
Main PCB on main
outdoor unit detects
compatibility issues.
Forced stop.
Automatic reset after re-
initialization detects
compatible units.
Summary of Contents for VRV IV+
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