GREE Air-ccoled Closed Control Unit Service Manual
114
4.3 Introduction for Main Electric Parts
Name
Picture
Function
AC contactor
AC contactor controls the
power supply for compressor,
indoor fan, outdoor fan, Electric
heater pipe, electrode humidifier.
When the working power
terminal of contactor is
energized, the contactor, main
contact and auxiliary contact
which are normally open will be
conductive. The auxiliary contact
which is normally closed will be
off. Working voltage of coil is
220V
～
.
Air switch
When there is overload or
short circuit, air switch will be
activated to cut off the power to
protect the unit.
Overcurrent
protector
Overcurrent protector will
detect the current to the wire of a
load. When the current is bigger
than the activation value of
overcurrent protector, its
normally closed contact will be
off. This contact usually
connects to the port of alarm of
controller so at that time, the
controller will give alarm.
Fusible cutout
If fusible cutout connects to
circuit, controller will not give
alarm but electric heater will not
work. In that case, the fusible
cutout may be damaged. Check
if it is still conductive by universal
meter. If it is conductive, it is
good while if not, it is damaged.
