Scotsman HID312 Service Manual - Manual (Page 14)

HID312, HID525, HID540
Service Manual
April 2015
Page 14
Controller
All models use the same control system.
The electronic controller operates the compressor
(with fan motor), auger drive motor, dispense drive
motor and inlet water solenoid valve. It monitors:
• Reservoir water availability
• Storage bin ice level
• Call for ice dispense
• Call for water dispense
• Refrigeration pressure
• Dispense enable / disable
• Auger motor speed
• Auger motor rotation
• Any installed control options
Many of these are used to insure that the machine
does not damage itself during use. For example, it is
critical that it not attempt to make ice without water, so
if the water sensor is dry, the machine will not make
ice.
Switches - there are four switches:
• Dispense water - to test water dispensing
• Dispense ice - to test ice dispensing
• On/Off - to switch the machine on or off. Holding it
in to shut off will stop ice making immediately.
• Clean - to engage the clean mode
Indicators - there are nine LEDs:
• Power - Glows when controller has power
• Status - Glows when in ice making mode
• Time to Clean - Glows when it is time to clean the
machine
• Water Dispense Sensed - glows when the water
dispense sensor has been triggered*
• Ice Dispensed Sensed - glows when the ice
dispense sensor has been triggered*
• Water Dispense - glows when the inlet water
solenoid valve has been powered*
• Ice Dispense - glows when the ice dispense
motor has been powered*
• Auger - glows when the auger motor is on
• Compressor - glows when the compressor is on
* If blinking the water or ice dispensing time limit has
been met.
There is also a code display, the codes are:
O - - - for off
F - - - for ice making
b - - - for bin full
E - - - for controller error
C - - - for clean mode
d - - - for test mode
1 - - - for auger rotation direction wrong
2 - - - for auger speed too slow
3 - - - for no water sensed
4 - - - for high refrigerant pressure
If a number code is triggered, the controller will stop
ice making. A blinking code means it is a temporary
condition. Example: A blinking F occurs during the
ice making restart process; it stops blinking when the
compressor starts.
The controller will automatically restart from a water
interruption or power interruption or when a refrigerant
pressure switch has automatically reset.
To reset the control when it has been manually locked
out, Push and release the On/Off button to shut it Off
and then Push and release it again to switch it On.
Note: The compressor will not restart for 4 minutes
from the time it was shut off.