Scotsman NME1854R Manual de servicio descargar pdf (Pagina 25)

NME1854R & FME2404R

January 2000

Page 25

SERVICE DIAGNOSIS: Condition

Symptom Possible Cause Probable Correction

No ice is made, nothing operates Unit off due to no power. Restore power

Unit off due to master switch in Off

position

Move master switch to ON

Unit off due to low water level in

reservoir

Check water supply, filter and float

valve.

Unit off due to ice level sensors

(photo-electric eyes) blocked

Check/clean ice level sensors

Unit off due to scale on water level

sensor

Clean water level sensor

Unit off due to high pressure control

open

Check for remote condenser fan

motor failure or power interruption to

the fan motor

Auger motor hums but does not turn Auger can’t turn. Circuit board has not

yet shut unit down.

Unit is shut down Circuit board has shut ice machine

down due to high auger motor amp

draw. Check for cause of high amp

draw, including bearings, gear motor

condition and scale on auger &

evaporator.

Pump down pressure control open,

very low suction pressure

Auger not turning due to: motor

failure; auger relay failure on circuit

board; or gears stripped. Check drive

train.

Liquid line valve not opening due to

coil failure or failure of compressor

relay on circuit board

TXV restricted or not metering. Check

bulb temperature.

Lack of refrigerant. Check for a leak.

No power to circuit board Check harness

Hi or Low pressure switches open

Circuit board gear motor relay open Check / replace board

Water level or ice level sensor failed Check / replace sensor

No ice, auger motor is turning Compressor contactor coil is open Check / replace contactor

Compressor will not start Check start capacitor

Check start relay

Check compressor windings

Circuit board relay will not close Check / replace board

Pump down pressure switch does not

close, liquid line valve open and

suction pressure high

Check pump down switch contacts

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 34 35

NME1854R & FME2404R 1

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Scotsman NME1854R Manual de servicio Pagina 25

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