Scotsman Modular Cuber C1448

Initial Testing with Indicator Lights

Shut unit off by holding the Off button for 3 seconds

Is the Purge Valve indicator light ON?

Voltage Check if Purge Valve Does Not Open

Shut the unit down by holding the Off button for 3 seconds

Unplug the harness connection from the purge valve

Push and release the Harvest button to activate the Harvest Assist

Is the Hot Gas indicator light on?

Is there full voltage at the solenoid harness connector?

Is there voltage from pin 5 to ground at the controller?

Replace the solenoid if it does not extend with full voltage present

Replace the harness if there is voltage at pin 5 but low voltage at the solenoid harness connection

Replace the controller if the voltage to ground is low

Attach refrigeration gauge set to high side port

Unplug both wires from fan pressure control and wrap terminals in electrical tape

Connect ohmmeter to terminals of fan pressure control

Observe and record pressure at which the pressure control closes

Is the closing pressure within specification?

Switch unit off and allow system to equalize

Observe and record pressure at which the pressure control opens

Remove the ice thickness sensor from the water distributor bracket.

Separate the metal sensor from the plastic insulator-bracket.

Wipe the sensor with diluted ice machine scale remover.

Scrub the plastic insulator-bracket with diluted ice machine scale remover to remove all traces of mineral build up.

Wipe the wire to the bulkhead with diluted ice machine scale remover.

Wash all ice thickness sensor parts with clean water.

Measure idle voltage at the contactor (compressor off)

Measure active voltage at the contactor (compressor starting)

Is the supply voltage not less than the lowest rated voltage for the ice machine?

Measure PTCR resistance at room temperature (50-100°F)

Is PTCR resistance between 25 and 50 ohms?

Measure resistance to ground from PTCR

Is resistance to ground infinite?