Scotsman SCE275 - Manual (Page 28)

Service Diagnosis
SCE275
January 2003
Page 28
Problem or Symptom Possible Cause Probable Correction
Fan motor(s) do not
turn.
Open motor windings, or
seized bearings, or blade
stuck against shroud
Replace fan motor or free fan blade.
No power to fan motors
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.
Pump motor does not
turn
Open motor windings, or
seized bearings
Replace pump
No power to 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.
Hot Gas Valve does
not open.
Open solenoid coil. Replace hot gas valve
Stuck valve Replace hot gas valve
No power to coil in Harvest
Check wire connections, if ok, replace AutoIQ
Controller
Hot Gas Valve leaks
thru (warm tube
temperatures on both
sides of valve during
freeze)
Mechanical problem in
valve
Replace valve
Water Inlet Valve does
not open
Open solenoid coil Replace valve
Stuck valve Replace valve
No power to valve (early
part of harvest) Check wire connections, if ok, replace AutoIQ
Controller
Water Inlet Valve does
not flow enough water
Restriction in water supply Check water filters and/or inlet screen.
Water Inlet Valve
leaks thru Mechanical problem in
valve
Replace valve
Compressor does not
work
Unit in Clean cycle Push and release Freeze button.
Contactor coil open Replace contactor
Open starting components Check and replace
Open windings Check and replace compressor
Internal valve failure Replace compressor