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.
September 2006 Page 28
Electrical Sequence - Air or Water Cooled
