Gree GMV6 DC Inverter VRF Units Service Manual
No
Yes
"C3" Com munication Fault
Be twee n t he Prima ry Co ntroller
an d Inve rt er Fan Drive r
Whet he r t he communica tion
cab les betwe en the main bo ard o f o utd oo r
un it a nd inverte r fan drive b oa r d
are conne cted prop erly?
Con ne ct th e co mmu nicatio n
cables properly
No
Replace the fan drive board
The main cont ro l bo ard ma y be
abnormal
Yes
Rep lace the m ain co nt rol bo ar d
Whet he r t he ou tdo or u nit's
fa n drive bo ar d is nor mal?
Yes
2.30 "C4" Indoor Unit Loss Fault
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
When the unit identifies that more than three indoor units are disconnected, it will stop for protection.
Possible causes:
■ Poor contact of communication cables;
■ The indoor units are powered off;
■ The main board of indoor unit operates improperly.
Troubleshooting:
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