Gree GC201808-III, Service Manual

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GREE GMV5 HR HEAT RECOVERY UNITS
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settings.
Fo
r the basic module set to master unit, the module address is displayed as “01” on the main board.
Precautions:
①
When the DIP switch setting is not covered in the above scope, a DIP switch setting exception
fault may occur.
②
A module must be set to master unit status, and only one module can be set to master unit
status in each refrigerating system. Other modules are set to sub-module status.
③
Settings must be performed in power-off status.
④
The default factory setting is "00" master unit status.

Master module must be set correctly; otherwise units cannot be started up.
3.1.9 DIP Switch Example
(1) Explanation of DIP switch positions
On the DIP switch, “ON” indicates “0” status and the opposite direction indicates "1” status.
The position of white lever indicates the position to be set to.
(2) Example
The following takes master unit settings as an example. Assume that a system consists of three
modules: module a, module b, and module c. Set module c to master unit and the other two modules to
sub-modules. The settings are as follows:
3.2 System Function Button Operations
Note:
①
System function settings and query must be performed after commissioning of the entire unit.