GEAppliances AZ75E09DAC, Technical Service Manual

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GEA01243
5
4
3
2
1
230/208
VAC
RY102
CN2
CN107
BL
GR
BK BK
GY
CN106
CN105
MAIN
BOARD
DRIVER BOARD
9
8
7
6
5
5
4
3
2
1
265
VAC
BL
GR
GY
9
8
7
6
5 3
5
SUB BOARD
RY202
3
1
2
RY103
3 1
3 1
3
1
3
1
2
3
1
REV.
VALVE
SOLENOID
RY108
ENERGIZED = AIR CONDITIONER
DE-ENERGIZED = HEAT PUMP
Reversing Valve Troubleshooting
Reversing Valve Coil
Resistance Value = 1200
Ω Ω Ω Ω Ω
Note: Minimum compressor/fans-off
time is 3 minutes.
Set thermostat to cool mode. Adjust
the temperature set point to a setting
below room temperature. Check for
line voltage on driver board at CN105
between pins 1 and 3.
Voltage present?
Feel the lines
going to the indoor
coil.
Do lines feel warm
or cold?
YES
Check for 5 VDC
on main board at
CN2 between pins
5 and 10?
Voltage present?
NO
Replace main
board.
NO
Replace driver
board.
YES
WARM
Note:
•
Minimum compressor/fans-off time is 3 minutes.
•
Heat pump models will utilize electric resistance
heaters for initial heat mode startup. Once the
thermostat set point is attained, the unit will
cycle off and automatically switch to heat pump
operation on subsequent cycles, unless the
outdoor temperature is less than 25 ˚F.
Set the thermostat to heat mode. Adjust the
temperature set point to a setting above room
temperature. When compressor comes on, feel
the lines going to the indoor coil.
Do lines feel warm or cold?
COLD
COLD WARM
Reversing valve is
operating properly.
Suspect a faulty
valve coil.
Suspect a faulty
valve coil.