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The VCC receives one of 3 signals from the adaptor board: OFF, E frequency, and H
frequency.
The VCC control signal is OFF whenever the voltage drive to the compressor relay is off.
H (HIGH COOLING CAPACITY) STATE CRITERIA
The VCC control signal goes to the
detected
:
The first compressor cycle after power restoration. The high capacity provides a faster
initial pull-down to control temperature
• The compressor duty cycle exceeds DCHT, 90%. Once triggered, this mode persists until
the duty cycle drops below DCHX, 50%. A high external ambient increases the duty
cycle.
• Compressor operation for more than 3 hours. The longest normal run time at 90° F is 2.5
to 3 hours. A longer run time implies the user activated the maximum refrigerate or
maximum freeze mode or there is an unusual cooling load. The mode persists until the
duty cycle drops below DCHX.
The VCC control signal assumes the E state when none of the conditions above for the H state
are valid.
Note: Compressor Speed = Frequency x Motor Constant
SPECIFICATIONS AND FEATURES
OFF STATE CRITERION
frequency when any of the following conditions are
H
E (EFFICIENT COOLING STATE CRITERION
.
10

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