Service Diagnosis: Components - Scotsman CME256 Product Manual

Service Diagnosis: Components

Problem or Symptom Possible Cause
Fan motor does not
turn. Refrigeration light
may be on steadily or
blinks 3 times and
repeats.
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
CME256, 506, 656, 806: AutoIQ™ Cubers
Open motor windings, or
seized bearings
No power to fan motor
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
Water level too low or not
sensed
January 2002
Page 25
Probable Correction
Replace 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.
Replace 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.
Replace hot gas valve
Replace hot gas valve
Check wire connections, if ok, replace System
Controller
Replace valve
Replace valve
Replace valve
Check wire connections, if ok, replace System
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
Unit must be full of water before controller will
start compressor. Check water level and
sensor and harness.