Scotsman UC2724 User Manual

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UC2024 and UC2724 User Manual

November 2019

Page 12

For The Technician: Indicator Light Reference

There are four indicator lights visible when the

electrical component drawer is pulled out.

Timer Cut In

• This light is switched ON when the freeze cycle has progressed signicantly enough for the

evaporator thermostat to have reached its freeze preset temperature. At this point there are only

a few minutes left in the freeze cycle. It is also switched ON when the harvest cycle has been on

and the evaporator thermostat has reached its set defrost temperature.

Curtain Switch

• Normally OFF. This light is switched on and o󰀨 by the position of the ice sensing plate.

Freeze Cycle.

• Normally ON during a freeze cycle. OFF during harvest or ice release.

Anti Slush

• Normally OFF. This light is switched ON when the pump is stopped during a freeze cycle.

A typical cycle begins when there is no ice on the ice sensing plate (Curtain Switch light OFF). The compressor

and water pump will switch ON and when the discharge pressure increases to the cut in point of the fan

pressure switch the fan motor will begin to rotate the fan. The hot gas and inlet water solenoids are o󰀨.

This continues until the evaporator temperature sensor reaches a preset point, which causes the pump to stop

for a few seconds (the Anti Slush light will switch ON). After the Anti Slush light goes out and the water pump

is switched back on, the freeze cycle continues until the evaporator temperature sensor reaches the timer start

point, (Timer Cut In light is switched on).

When the timer has reached the end of its preset freeze time, Harvest begins (the Freeze Cycle light is

switched o󰀨). The water pump stops, the hot gas valve and inlet water solenoid valve open and the discharge

pressure falls, so the fan motor stops. Harvest continues until the released ice causes the ice sensing plate to

move and the Curtain Switch light will either: a) blink On and O󰀨, if the ice bin is not full, or b) switch On when

the bin is full and ice is on the ice sensing plate.

If the bin is full the machine will shut o󰀨 and be in a stand by mode. If not full, the cycle will repeat.

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Scotsman Uc2724 Undercounter Ice Machine