24 | Troubleshooting
Installer and user reference guide
160
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
Main code Sub code Cause Solution
Master Slave 1 Slave 2
— Unit is not prepared to execute
leak detection operation
Refer to requirements to be
able to execute leak detection
operation.
— Indoor unit is out of
temperature range for leak
detection operation
Retry when ambient conditions
are satisfied.
— Outdoor unit is out of
temperature range for leak
detection operation
Retry when ambient conditions
are satisfied.
— Too low pressure was noticed
during leak detection operation
Restart leak detection
operation.
— Indicates an indoor unit which
is not compatible with leak
detection functionality is
installed (e.g. Hydrobox, …)
Refer to requirements to be
able to execute leak detection
operation.
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