GREE Air-ccoled Closed Control Unit Service Manual
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（3）Treatment: During normal operation, when the temperature of a controlled part
reaches the preset value, the temp sensor whose activation temperature
is fixed or adjustable will cut on or off the circuit. It can be automatically or
manually reset.
4.1.4 Overcureent Protector of Compressor:
（1）Protection conditions: Current of motor is huge and currents of three phases are not in
balance. There is phase loss.
（2）Result of activation: Overload protection of motor will be shown on wired controller;
（3）Treatment:：Check if winding of three phases of compressor is normal. If it is, turn on
the unit again and check if the working current of compressor and system
pressure are normal.
4.1.5 Fusible Cutout:
（1）Protection conditions: Temperature of controlled parts reaches the set value;
（2）Result of activation:：Contact of fusible cutout is on or off;
（3）Treatment:： During normal operation, when the temperature of a controlled part
reaches the preset value, the temp sensor whose activation temperature
is fixed or adjustable will cut on or off the circuit. It can be automatically or
manually reset.
4.1.6 AC contactor:
（1）activation conditions: Coil of AC contactor is energized;
（2）Result of activation: Main contact closes and load is started up.
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