0 93 MAINTENACE
GMV5 COMPACT MULTI VRF UNIT
SERVICE MANUAL
3.2 Introduction of main electric parts of inverter system
It is mainly used for filtering the
intererence of the power supply and
prevent the unit from interfering the
power supply so that the operation
of the unit will not affect the other
electric appliances such as TV.
Drive board is the control board
of DC inverter compressor, which
provides the control signal of
changeable voltage, current,
frequency for compressor.
It is used to control the entire unit
with the control logic.
IPM module is integrated with 3 pair
complementary IGBT tube, whose
connection and disconnection are
controlled through PWM so that DC
bus voltage is imposed to the
winding of compressor. The
magnetic field will enable the rotor
to rotate for running of the
compressor
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