Gree GMV6 DC Inverter VRF Units Service Manual
2.32 "C6" Alarm on Inconsistent Number of Outdoor Units
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
The unit detects the number of online outdoor modules in real time. When it detects that the number
of current modules is inconsistent with the number of modules previously commissioned and memorized,
the unit will report the fault and stop working.
Possible causes:
■ Abnormal communication among modules;
■ The modules are not powered on.
Troubleshooting:
No
Yes
"C6" Alarm on Inconsistent
Number of Outdoor Units
Whether all modules are properly
energized?
Power on the units
No
Connect the communication
cables properly
The main control board
may be abnormal
Yes
Replace the main control
board
Yes
Whether the
communication cables
among all the modules are
connected reliably ?
2.33 "C8" Emergency Operation of Compressor
Fault display: main board of outdoor unit displays
Fault diagnosis:
If any compressor is set to emergency operation mode, the main board displays the code during the
operation, indicating that the unit's compressor has entered emergency operation.
Possible causes: --
Troubleshooting: not required.
2.34 "C9" Emergency Operation of Fan
Fault display: main board of outdoor unit displays
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