Gree GMV6 DC Inverter VRF Units Service Manual
2.107 "L6" Mode Conflict
2.108 "L7" No Master Indoor Unit
Fault display: wired controller of indoor unit and receiver of indoor unit display
Applicable models: all indoor units
Fault diagnosis:
The unit triggers the "no master indoor unit" fault when no master indoor unit exists in the system.
Possible causes:
■ The master indoor unit is disconnected;
■ The main board of the master indoor unit is replaced;
■ The main board of the master indoor unit is faulty.
Troubleshooting:
"L7" No Master Ind oor Unit
Whether all the indoor
units are connected to the same
power supply system?
Reset the ma ster indoor unit
Yes
Any delay in p owering on th e
master indoor unit will trigger
the "no master indoor unit"
fault, which is then cleared after
the ma ster indoo r unit is
powered o n.
No
Yes
Whether the main
board o f the master indoor unit has
been re placed?
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