Refrigeration System - Scotsman Prodigy Plus A Series Service Manual

NH0422, NS0422, FS0522, NH0622, NS0622, FS0822, NH0922, NS0922, FS1222, NH1322, NS1322, FS1522
Air, Water or Remote Service Manual

Refrigeration System

The refrigeration system is monitored by the high
pressure cut out switch. If the refrigeration discharge
pressure exceeds the pre-set point of the switch, it will
open, causing the controller to shut the machine off.
The discharge pressure control is an automatic reset
switch, and after the discharge pressure drops, the
controller will restart the unit. A 4 in the code display
indicates high discharge pressure.
The refrigeration system is also monitored by the low
pressure cut out switch. If the refrigeration low side
pressure drops below a pre-set point, the switch will
open. When that occurs, the controller will shut the
machine off. The low pressure cut out switch is an
automatic reset switch and after the low side pressure
increases to the cut in point, the controller will restart
the machine. A 4 will show in the code display to
indicate low suction pressure.
Note: the low pressure control for a remote is a pump
down switch, and when it opens the compressor stops
and no change is noted by the controller
Steady Green
Blinking Green
Blinking Red
Yellow
Blinking Yellow
Light Off
Power Status
Normal Normal
Self Test Failure Switching on or
off. When Smart-
Board used,
machine attention
recommended.
- Diagnostic shut
down
- -
- -
No power Switched to Off
Electrical Sequence
Pushing and releasing the On button starts the
machine. The sequence of operation begins with
water. Water must be sensed or the controller will
not start the ice making process. If there is no water,
a 3 will show it the code display. If there is water,
and there is nothing blocking the infrared beam of
the ice sensors, the controller will start the machine.
A flashing F will show in the code display while the
auger drive motor starts up. When it has started, the
compressor will start and the flashing F will change
to a continuous F. This continues until the ice level
control senses a full bin, at that time the compressor
is shut off, and the auger motor continues to operate
for a short time to clear the evaporator of any left over
ice. A lowercase "b" will show in the code display.
Indicator Lights & Their Meanings
Water
-
-
Lack of water
-
-
Normal
July 2020
Page 25
De-Scale &
Sanitize
-
-
-
Time to descale and
sanitize
In Cleaning Mode
Normal