Scotsman CME256 AutoIQ - Manual (Page 25)

Service Diagnosis: Components
CME256, 506, 656, 806: AutoIQ™ Cubers
July 2002
Page 25
Problem or Symptom Possible Cause Probable Correction
Fan motor does not
turn. Refrigeration light
may be on steadily or
blinks 3 times and
repeats. Open motor windings, or
seized bearings Replace fan motor
No power to fan motor Fan motor unplugged, check for voltage from
controller. If none, replace controller.
Some models have a fan control switch,
check it for continuity above 240 PSIG.
Pump motor does not
turn Open motor windings, or
seized bearings Replace pump
No power to pump Check electrical connections. If the unit is in
Freeze, Clean or Harvest the pump should
have power to it. If not, replace the System
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 System
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 System
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
Water level too low or not
sensed Unit must be full of water before controller will
start compressor. Check water level and
sensor and harness.