Service Diagnosis - Scotsman SCE275 Serivce Manual

SCE275

Service Diagnosis

Problem or Symptom Possible Cause
Fan motor(s) do not
turn.
Pump motor does not
turn
Hot Gas Valve does
not open.
Hot Gas Valve leaks
thru (warm tube
temperatures on both
sides of valve during
freeze)
Water Inlet Valve does
not open
Water Inlet Valve does
not flow enough water
Water Inlet Valve
leaks thru
Compressor does not
work
Open motor windings, or
seized bearings, or blade
stuck against shroud
No power to fan motors
Open motor windings, or
seized bearings
No power to pump
Open solenoid coil.
Stuck valve
No power to coil in Harvest
Mechanical problem in
valve
Open solenoid coil
Stuck valve
No power to valve (early
part of harvest)
Restriction in water supply
Mechanical problem in
valve
Unit in Clean cycle
Contactor coil open
Open starting components
Open windings
Internal valve failure
January 2003
Probable Correction
Replace fan motor or free fan blade.
Fan motor unplugged, check for voltage at
controller. Controller cycles fan motors during
freeze. If no voltage to the fan motors at
controller during freeze, replace controller.
Replace pump
Check electrical connections. Check water level.
Switch the unit to Clean, the pump should then
have power to it. If not, replace the AutoIQ
Controller.
Replace hot gas valve
Replace hot gas valve
Check wire connections, if ok, replace AutoIQ
Controller
Replace valve
Replace valve
Replace valve
Check wire connections, if ok, replace AutoIQ
Controller
Check water filters and/or inlet screen.
Replace valve
Push and release Freeze button.
Replace contactor
Check and replace
Check and replace compressor
Replace compressor
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