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 Indoor Unit
Whether all the indoor
units are connected to the same
power supply system?
Reset the master indoor unit
Yes
Any delay in powering on the
master indoor unit will trigger
the "no master indoor unit"
fault, which is then cleared after
the master indoor unit is
powered on.
No
Yes
Whether the main
board of the master indoor unit has
been replaced?
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