Gree GWC07NA-D3NNA5E, Service Manual

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Pull the blade by
hand under
de-energization
status
Check whether the
Test whether the voltage bewween motor
terminal 2 and 3 is 15VDC
Test whether there's voltage signal
beween motor terminal 2 and 4
It's the malfunction
of motor. Replace
the motor.
Adjust the motor and
blade assembly to let
the motor can operate
smoothly
Is malfunction
eliminated
Reinsert the wiring
terminal of indoor fan
It's the malfunction of
main board. Replace
the main board with
the same model
It's the malfunction of
main board. Replace
the main board with
the same model
It's the malfunction of
main board. Replace
the main board with
the same model
Start
Whether the
blade can operate
smoothly
Energize and restart upthe
unit, test whether the voltage beween motor
terminal 1 and 2 is 280~310VDC
Is malfunction
eliminated
Is malfunction
eliminated
Is malfunction
eliminated
Is malfunction
eliminated
wiring terminal between
indoor fan and main
board is loose