Service Diagnosis: Components - Scotsman CME1356 User Manual

Service Diagnosis: Components

Problem or Symptom
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
Possible Cause
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
May 2000
Page 31
CME1356 and CME1656
Probable Correction
Replace fan motor
Fan motor unplugged, check for voltage from
controller. If none, replace controller.
Replace pump
Check electrical connections. If the unit is in
Freeze the pump should 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
Unit must be full of water before controller will
start compressor. Check water level and
sensor and harness.