Scotsman CU0415 - Manual (Page 16)

August 2013
Page 15
Service Manual for Models CU0415, CU0715 and CU0920
Components
Compressors, three capacities
Type: Hermetic
Brand: Embraco
Condenser: air cooled forced draft, copper and
aluminum.
Evaporator: Nickel plated copper, inverted grid
Ice: Medium / Full Dice cube. 5 x 9 per cycle, about 1
lb per cycle
Metering device: Capillary tube
Refrigerant: R-134a.
Refrigerant Charge: 8 ounces, all models. No access
valves.
Fan motor: Unit motor, CU0415 and CU0715 are 2.3
watts; CU0920 is 6 watt. Fan motor may cycle during
freeze, should be off during harvest as the discharge
pressure will be below 100 PSIG.
Fan blade: Molded
Fan pressure control switch: Opens at 100 PSIG,
closes at 150 PSIG.
Water pump: OEM
Hot gas valve: Ported, line voltage coil
Inlet water solenoid valve: .275 GPM flow, line
voltage coil
Transformer: Output 12 volt AC
Controller: Microprocessor operated relays for fan
and pump. Internal electronic timer. Bridge thickness
and harvest time adjustable on controller. Indicator
lights for bridge thickness and harvest time. No
maximum or minimum time limits or error codes.
Lights for timer, freeze mode and anti-slush mode.
Thermistor failure indicated by all Bridge Thickness
and Harvest Time green lights blinking. Unit continues
to operate on a fixed timed freeze and harvest cycle.
Sensors: Thermistor for suction line temperature,
Thermistor for reservoir water temperature.
Bin Thermostat: Opens on temperature fall, must be
closed to power control system. Operates compressor
directly.
Master switch. On, Off, or Wash. DPDT, not a service
disconnect.
On: When contacts 2-1 are closed power is connected
to the bin thermostat, allowing it to automatically
switch the machine on and off.
At the same time contacts 5-4 are closed, making a
circuit to the pump common and fan motor pressure
control.
Off: all contacts open.
Wash: Contacts 2-3 provide a connection to contacts
5-6, connecting power to the pump common. Only
the pump operates when the switch is in the Wash
position.
Evaporator
Thermistor
Mounted above
accumulator,
clipped to suction
line.