Ultra Heat GMV Multi VRF
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codes manually. Only the addresses of master unit and central control are needed to be set (address of
central control is only needed when there are multiple refrigeration systems).
NOTICE! When installing centralized controller or remote monitor, indoor units’ project
codes must be displaced. Otherwise, collision malfunction of the project codes will show.
For detail operation methods, please refer to the Ultra Heat GMV Installation and
Maintenance Manual.
4.8 Connection Method and Steps for System Communication
4.8.1 Communication connection between IDU and ODU
NOTICE! The centralized controller can be installed when it is necessary.
Connection of communication for single-module system system:
Fig.40
Connection of communication for multi-module system:
