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6
The control box is accessed from the
rear of the unit. Remove the screws
holding the pipe cover and the
control box cover to reach the
control board and other components.
A solid state board controls the IM
operation. Several adjustments are
included on the board. These
adjustments are factory set for proper
operation.
Later, we will cover the adjustments
and discuss the proper settings.
Now, lets take a look at the basic IM
sequence of operation. When the
control switch is placed in ICE, the
unit starts in the Initial Harvest cycle.
When power is supplied, the
compressor, hot gas valve, and
actuator motor energize. The
compressor starts in harvest to
reduce the starting load and increase
compressor life. This will also clear
any ice from the evaporator plate
before the freeze cycle begins.
CONTROL SWITCH TO ICE.
INITIAL HARVEST CYCLE.
FREEZE CYCLE.
NORMAL HARVEST CYCLE.
FREEZE, HARVEST,
FREEZE, HARVEST,
FREEZE, HARVEST,
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