Scotsman SLE400R, User Manual

Page: 19 / 24

Service Diagnosis:
SYMPTOM POSSIBLE CAUSE PROBABLE FIX
No ice is made, nothing operates Unit off, due to no power Restore power
Unit off, due to ICE/OFF/WASH
switch in OFF position Switch ICE/OFF/WASH switch to
ICE
Unit off, due to bin thermostat
closed Check temperature at bin
thermostat bracket, if warmer than
40
o
F., thermostat should be
open. Adjust/replace thermostat.
Unit off, due to high pressure cut
out open Check fan motor.
No ice, compressor off No cooling due to compressor not
operating Check compressor for voltage,
continuity, and operation. Check
starting components. Replace if
found to be faulty.
If no voltage, check contactor,
replace if coil or contacts open.
Check temperature of
compressor, if hot may be lack of
refrigerant, defective TXV or
compressor
Unit off, due to low pressure
(pump down) control open. Check liquid line valve coil for
power and/or continuity
No ice is made, compressor is
operating No water due to water turned off. Reconnect water supply
No water due to water filter
plugged. Replace water filter
No water due to strainer screen
plugged Clean out inlet screen
No water due to inlet water valve
will not open Replace valve
Water in reservoir, but no water
over evaporators Water pump does not work,
replace pump
No cooling at evaporator due to
hot gas valve leaking thru Replace hot gas valve
No cooling at evaporator due to
fan not turning Check & replace fan motor.
Fan and pump do not have
power; hot gas valve opens and
closes. Coil or relay open, replace relay.
No cooling at evaporator due to
dirty condenser Clean condenser
No cooling due to compressor not
pumping Check system pressures, replace
compressor if not pumping
SLE400R
January 1995
Page 19