Gree GMV6 DC Inverter VRF Units Service Manual
154
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 Un it
Whether all the i ndoor
units are connected to the same
power supply system?
Reset the ma ster indoor un it
Yes
Any delay in p owering on th e
master ind oor unit will tr igger
the "no master ind oor unit"
fault, which i s th en clea red after
the ma ster indoo r un it is
powere d o n.
No
Yes
Whether th e main
boa rd o f th e master indoor uni t has
bee n re placed?