GEAppliances AZ75E09DAC, Technical Service Manual

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Reversing Valve
The reversing valve operates on 265/230/208 VAC and is used to switch the direction of refrigerant flow.
The reversing valve controls the direction of the refrigerant flow. When the reversing valve solenoid is
energized, it will close the reversing valve and the unit will operate as an air conditioner. When the
solenoid is de-energized, the reversing valve will open and the unit will function as a heat pump.
To confirm that the reversing valve and reversing valve solenoid are functioning properly, the main board
continually monitors the indoor coil thermistor and outdoor coil thermistor. Should the system operate in
the reverse of the selected mode due to a reversing valve or reversing valve solenoid malfunction, the
board will detect improper thermistor readings, determine that the unit is not operating properly, and
terminate compressor operation.
Note: Some thermostats can be programmed to energize the reversing valve in heat mode or cool
mode. If the thermostat is not programmed correctly, the unit will heat when the thermostat is set to
cool and will cool when the thermostat is set to heat. Refer to the instructions provided with the
thermostat for thermostat programming procedures. Also refer to the Remote Thermostat Control
section of the Features and Operation chapter for more information.
To remove the reversing valve solenoid:
1. Remove the unit from the cabinet (see Slide-
Out Chassis chapter).
2. Remove the electronics cover.
3. Remove the left divider assembly.
4. Disconnect the reversing valve solenoid wiring
from the driver board.
5. Remove 1 (7 mm) screw and the reversing
valve solenoid.
Reversing
Valve Reversing
Valve