Gree GMVVQ1015WM/C-X, Service Manual

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Gree GMV6 HR DC Inverter VRF Units Service Manual
110
No
Yes
"C0" Communication Fault
Between I ndoor and Outdoor
Units and Between I ndoor Unit
and Wired Cont roller
Whet her t he
communication cables
between t he main control board of the
outdoor unit and the indoor unit and bet ween
the indoor unit and t he wired controller
are incorrectly connected
or loosen?
Connect the communication
cables properly
Yes
Replace the communication
cables
The main cont rol board of t he
outdoor unit, the main control
board of the indoor unit or the
wired controller may be abnormal
Yes Replace the main cont rol board
of the outdoor unit, the main
control board of the indoor unit
or t he wired controller
Whet her t he
communication cables
between t he main control board of the
outdoor unit and the indoor unit and between
the indoor unit and t he wired controller
are disconnected?
No
No
Make sure that the
communication cables are
properly connected
Whet her t he contact between t he
communication cable and terminal
block is poor?
Yes
No
Make sure that no more than t wo wired cont rollers
are connected to the indoor unit at the same time;
when t wo wired controllers are connected t o t he
indoor unit at t he same time, make sure they are
assigned with different addresses; when one wired
controller is connected to the indoor unit, make sure
it is set to the primary controller
Whet her t he number and addresses
of the wired cont rollers
are incorrectly conf igured?
Yes
2.31 "C2" Communication Fault Between the Primary Controller and
Inverter Compressor Driver
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
When the outdoor unit fails to detect inverter compressor driver for 30 consecutive seconds, the
fault is generated.
Possible causes:
■ The communication cables between the main board of outdoor unit and inverter compressor driver
inside the module are connected improperly;
■ The inverter compressor driver operates improperly;