Gree GWC12ATCXB-K6DNA1B - Page 61

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Installation and Maintenance
Service Manual
7.Desynchronization diagnosis for compressor
Main check point:
(1) system pressure (2) power supply voltage
NOTE:The control board as below means the control board of outdoor unit.
Y
N
N
N
Y
Y
N
Y
N
N
Y
N
Y
Y
N
Y
Desynchronization occurs
during operation
Check whether the fan
terminal OFAN is
connected well.
Desynchronization occurs
after turning on the unit
Replace the fan
capacity C1.
Does the outdoor fan operate
normally?
Check whether the compressor
has stopped operation for more
than 3mins.
Improve the radiation of the
unit (such as clean the heat
exchanger, strengthen the
ventilation, etc.) .
Replace the outdoor fan
Is the radiation for the unit
not good?
Turn on the unit when the
power has resumed to the
normal range.
Check whether
the compressor wire (UVW) is
connected well and the connection
sequence is the clockwise
direction.
Is the input voltage of the
unit normal?
Connect the wires
Replace the control board
Charge the refrigerant
according the Service
Manual.
Is the refrigerant too much?
Replace the control board
Replace the compressor
End
End
Replace the compressor
Eliminate
malfunction
Eliminate
malfunction