Service Diagnosis: Components - Scotsman CME1856W User Manual

Service Diagnosis: Components

Problem or Symptom Possible Cause
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 runs, but
loudly & no ice is
made
Compressor does not
work
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 (best
checked at the beginning
of Freeze)
Restriction in water supply
Mechanical problem in
valve
Three phase compressor is
phased wrong
Unit in Clean cycle
Contactor coil open
Open starting components
Open windings
Internal valve failure
November 2001
Page 31
Probable Correction
Replace pump
Check electrical connections. In Freeze, the
pump should have power to it. If not, replace
the Controller.
Replace hot gas valve
Replace hot gas valve
Check wire connections, if ok, replace
Controller
Replace valve
Replace valve
Replace valve
Check wire connections, if ok, replace
Controller
Check water filters and/or inlet screen.
Replace valve
Switch any two wires to the compressor
Push and release Freeze button.
Replace contactor
Check and replace
Check and replace compressor
Replace compressor
CME1856W