Gree GMV-VQ680WM/C-X Service Manual page 120

Gree
If two or more master units' DIP switches (SA2) are detected to be master unit's DIP switches in the
network (that is, SA2 DIP switch is "00000"), the fault of multiple master units is reported.
Possible causes:
■ If two or more master units' DIP switches (SA2) are detected to be master unit's DIP switches,
keep only one master unit's DIP switch (SA2) to be "00000" and other master units' DIP switches (SA2)
to be different;
■ Abnormal DIP switch or main board.
Troubleshooting:
"CJ" System Addre ss Cod e
Whether two or more master units'
DIP switches (SA2) are set to the master
The detection circuit may
Conflict
unit's DIP switche s?
No
ope rate impro perly
GMV6 HR DC Inverter VRF Units Service Manual
Kee p the SA2 DIP switch to be
"000 00" for o nly on e master u nit, and
Yes
set that for oth er ma ster units to b e
diffe rent. Afte r re dialing, power on the
Yes
Replace th e main control
boa rd
118
redi aled units aga in