Scotsman CME456 Handbuch PDF herunterladen (Seite 31)

Service Diagnosis: Controller Diagnostic Light Analysis

CME306 & CME456

January 2000

Page 31

Problem or

Symptom

Possible Cause Probable Correction

Machine is off Bin is full, ice in cube port Use some ice

Bin full light on, no ice in

cube port

Check optional thermostat, check for scale on

ice sensor lens

Power is off, check lights. If all lights are out, check power supply, restore

power if off

Optional bin thermostat is

closed

Check thermostat for ice on the bulb. If none,

check adjustment.

Transformer is open If all lights are out and there is power, check

transformer output for 24 vac

Unit has been switched off

Off lite is glowing

Push and release Freeze button to restart unit.

Compressor will not start Not enough water or water not sensed.

Unit has Shut Down Check for Refrigeration or Water Error

Unit is off & Water

diagnostic light is ON

or BLINKING

Water inlet valve

malfunction

Check water diagnostic light, if it blinks 2 times

and repeats, check the water inlet valve for

proper water flow.**

Water pump malfunction Check that pump hose is attached and if pump

is plugged in and working.

Water level not sensed or

not high enough

Check harness from sensor.

Unit is off &

Refrigeration

diagnostic light is ON

or BLINKING

Low discharge or long

freeze cycle

If the Refrigeration light is glowing steadily,

there is a probable refrigeration problem

Harvest problem If the Refrigeration light blinks once and

repeats, look for a harvest problem.** This also

indicates that cubes were “sensed” by the bin

controls.

If the lite blinks 2 times and repeats, check for a

harvest error - no cubes sensed.

High Discharge Temp If the refrigeration diagnostic light blinks 3 times

and then repeats, check for a reason for high

discharge temperatures.

Unit does not go into

harvest - exceeds

maximum freeze time

Push and release Off button. Push and release

Freeze button. Check operation.

Push cube size float down and check operation.

Exceeds maximum harvest

time

Check for cause of long harvest cycle**

Unit runs and both

Diagnostic lites are

Temperature sensors out

of range

Replace the temperature sensor set (water and

discharge).

* Machine may be reset by pushing and releasing the Off button, then pushing and releasing the Freeze

button. ** See following pages

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 39 40

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