GE AZ85E09DAC Technical Service Manual page 44

Compressor
The Zoneline compressor is a rotary type that
operates on 265/230/208 VAC. After the compressor
has cycled off, it will not attempt to restart for 3
minutes + /-10 seconds, regardless of the state of
the thermostat. This will allow internal pressure to
equalize and prevent the compressor from stalling
by trying to start against high pressure in the sealed
system.
Current fl ow into the compressor is monitored by
the main board to determine if the compressor is
running or locked. If the run signal is sent and a
locked condition is detected for 4 seconds, the run
signal will stop and a 3-minute count will begin.
After the 3-minute count, the run signal is sent
again. If the compressor starts, the count is reset
and the unit functions normally. If the compressor
does not start after 4 consecutive attempts, the
control will determine that a compressor failure has
occurred and a beeping alarm will sound. The alarm
will continue until the compressor failure condition is
reset by turning the unit off at the ON/OFF switch or
by removing power to the unit.
The compressor overload is internal to the
compressor for 18000 BTU models and is located
under the relay/overload cover for 9000 and 12000
BTU models. Should the overload trip (open) it will
open the common line to the compressor, stopping
compressor operation.
A copper process tube is provided for access to the
low-pressure side of the refrigeration system.
The compressor capacitor is located behind the
control cover. (See
Capacitor
C o m p e r s s r o R
C o m p e r s s r o
i S e z
9 0 0 0 B T U
2 3 0 2 / 0 8 V A C
1 2 0 0 0 B T U
2 3 0 2 / 0 8 V A C
1 8 0 0 0 B T U
2 3 0 2 / 0 8 V A C
.)
e s s i a t n c e V a u l e s
W n i d n i g W n i d n i g
C o t R C o t S
Ω Ω
3 4 . 5 8 .
Ω Ω
2 3 . 2 1 .
2 Ω Ω
2 2 .
Reversing Valve
The reversing valve operates on 265/230/208 VAC
and is used to switch the direction of refrigerant
fl ow. The reversing valve controls the direction of the
refrigerant fl ow. 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 confi rm 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. For additional information, refer to the
Remote Thermostat Control section. (See
and Operation.)
To remove the reversing valve solenoid:
1. Remove the unit from the cabinet. (See
.)
Chassis
2. Remove the electronics cover. (See
3. Disconnect the solenoid wire connector (CN108)
from the drive board. (See
.)
Views
4. Remove the left divider assembly. (See
.)
Fan Motor
5. Cut off plastic wire ties that retain solenoid
wiring.
6. Remove the 2 wire retainers, and the wire cover
from the back of the indoor fan housing. (See
Outdoor Fan Motor
7. Pull the solenoid wires through the opening.
8. Remove the 7-mm hex-head screw and the
reversing valve solenoid.
– 44 –
Features
Slide-Out
Main Board
Circuit Boards Locator
Outdoor
.)
).