Electrical Sequence - Air or Water Cooled (continued)
Indicator Information: The display shows a non-blinking H. The Power and Status Lights will be Green.
The compressor, hot gas valve and one or two curtain switch lights will be ON. After a few seconds the
water pump, purge valve and inlet water valve lights will come on.
The fan motor(s) shut off and remain off throughout the harvest cycle.
The harvest assist solenoid is connected in parallel with the hot gas valve. Although it is energized
throughout the harvest cycle, its piston does not move until the ice has become partially loosened from
the evaporator plate by the action of the hot refrigerant gas passing through the evaporator serpentine.
The water pump and purge valve will shut off when the purge level setting time has been reached, either
the manual time or the automatic time. The inlet water valve will remain on until it fills the reservoir. The
Ready to Harvest light will switch Off when the ice falls from the evaporator.
Harvest continues until the ice slab is ejected from the evaporator and falls, opening the curtain. When
the curtain opens, the magnetic reed curtain switch opens, breaking the circuit to the controller. If the
curtain re-closes within 30 seconds, the controller switches the machine back into another freeze cycle.
If the curtain switch remains open, the controller shuts the machine down and puts it into a standby
position.
May 2008
Page 19
CU1526, CU2026, CU3030
Service Manual
