Inverter Compressor - GEAppliances CFE28TSH Technical Service Manual

Do not attempt to direct-start the
compressor. The compressor operates on a 3-phase
power supply. Applying 120 VAC to the compressor
will permanently damage the unit. It is not possible
to start the compressor without an inverter.
The compressor is a reciprocating, variable speed,
4-pole type. It operates on 3-phase, 80 VAC to 240
VAC within a range of 55 Hz to 130 Hz.
Certain voltmeters will not be able to read
voltage output or frequency from the inverter.
Compressor wattages at various speeds are 60
watts - 180 watts.
The compressor is controlled by the inverter, which
receives its signal from the main control board.
Varying the frequency to the inverter changes the
compressor speed.
TO CABINET
WIRING
ORANGE
RED
COMMUNICATION
WHITE
SIGNAL
BROWN
INVERTER
GROUND
Compressor speed is based on the temperature
temperature.
The use of 3-phase power eliminates the need for
the relay, capacitor, and individual start and run
windings; therefore, the start, run, and common
pins found on conventional compressors are not
applicable on this 3-phase model. Compressor
pin functions are identical and compressor
resistance of 9 ohms to 11 ohms should be read
between any 2 of the 3 pins. Should an opening
occur in the compressor winding or should one
of the compressor lead wires become open or
disconnected, the inverter will stop voltage output to
the compressor.
Compressor operation is extremely smooth and
cool. The compressor exterior temperature may
be slightly higher than room temperature while
running unit.
BROWN
GREEN/YELLOW
BROWN
BLUE
BLACK
COMPRESSOR
Run diagnostic 0 - 95 and check for compressor
startup. Feel for a vibration when the compressor
tries to start. It may take up to 8 seconds before the
compressor attempts to start.
• The inverter has built-in circuit protection to
guard against damage from a failed or shorted
compressor. However, if a failed compressor
is diagnosed, order a new compressor and
compressor fails to start after the inverter
replacement, replace the compressor.
• When servicing the compressor, it is important
to dress the wiring to keep low voltage DC wiring
and 120 VAC wiring separate.
The compressor is a reciprocating type. Refer to the
: During normal operation, the
temperature of the single-speed compressor may
be hot. Use caution to avoid injury and wear Kevlar
gloves or equivalent protection.
Disconnect power from the unit. Wait 3 to 5 minutes
for pressure to equalize. Place a hand on the
chassis, near the compressor. Reconnect power and
feel for a vibration when the compressor tries to
start.
The single-speed compressor will start right
away if pressure is equal.
TO CABINET
WIRING
ORANGE
– 81 –
GREEN
BLACK
OVERLOAD
RELAY
WHITE
ORANGE
RUN CAPACITOR
®