Gree GMV-VQ680WM/C-X Service Manual page 330

Gree
Removing procedure
(1) Check whether the unit is the master or slave module.
① It can be checked by the "master module setting DIP SA8" of the ODU.
There is only one master module in a refrigeration system (set in the power-off status). The
master module is defined as follows: (the ON position on the DIP identification is "0", the opposite
direction is the status of "1"). If SA8 is set to 00, it is the master module. If SA8 is set to 10, it is a
slave module.
Master module status
Slave module status
② It can be checked by the display of the digital LEDs on the main board of the ODU.
When the master module is powered on, the LED1 shows "01". The digital LEDs of a slave
module show "02", "03" or "04" (as shown in the following figure).
Check whether the unit
is the master or slave
module
Power off the unit and
replace the main board
DIP setting
Checking
communication status
Setting of master unit
engineering
commissioning status
System parameter
setting
White lever
position
White lever
position
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GMV6 HR DC Inverter VRF Units Service Manual
White lever
position
White lever
position