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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.
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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.
Compressor speed is based on the temperature
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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
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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
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running unit.
BROWN
BLACK
BLUE
WHITE
BROWN
RED
ORANGE
GROUND
INVERTER
COMPRESSOR
GREEN/YELLOW
GREEN/YELL
OW
GR
OUND
TO CABINET
WIRING
COMMUNICATION
SIGNAL
BROWN
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The compressor is a reciprocating type. Refer to the
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:$51,1*
: 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.
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The single-speed compressor will start right
away if pressure is equal.
RUN
CAPACITOR
TO
CABINET
WIRING
ORANGE
WHITE
ORANGE
BLACK
OVERLOAD
RELAY
GREEN
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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.
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• 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
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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.
