Scotsman AC 105 Service Manual page 25

Page 24
SERVICE DIAGNOSIS
SYMPTON
Shortage of water
Irregular cubes size & some
cloudy
Cubes too large
Decreased ice capacity
Poor harvest
POSSIBLE CAUSE
Water spilling out through curtain
Water solenoid valve not opening
Water leak in sump area
Water flow control plugged
Leak of water drain valve
Some jets plugged
Shortage of water
Unit not level
Freezing cycle too long
Inefficient compressor
Leaky water valve
Non-condensable gas in system
Poor air circulation or excessive
hot location (Red-alarm LED glows)
Overcharge of refrigerant
Capillary tube partially restricted
Hot gas solenoid valve leaking
Undercharge of refrigerant
Discharge head pressure too high
Restriction in incoming water line
Water inlet valve not opening
Hot gas valve orifice restricted
Air vented holes in mold cups
Discharge head pressure too low
SUGGESTED CORRECTION
Check or replace curtain
Replace valve
Locate and repair
Replace water inlet valve
Replace valve
Remove jet cover and clean
See shortage of water
Level as required
Review setting of DIP SWITCH keys
Replace
Repair or replace
Purge the system
Relocate the unit or provide for
more ventilation
Correct the charge. Purge off slowly
Blow charge, add new gas & drier,
after evacuating system with
vacuum pump
Replace valve
Charge to data plate indication
See incorrect discharge pressure
Check water valve strainer and flow
control. If necessary enlarge the
flow control orifice
Valve coil with open winding
Replace valve
Replace hot gas valve assy
Clean out holes plugged
See incorrect discharge pressure