Service Diagnosis - Scotsman SLE400R User Manual

Service Diagnosis:

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