Scotsman EC 46, Service Manual

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SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION
Irregular cubes size & Some jets plugged Remove jet cover and clean.
some cloudy
Shortage of water See shortage of water.
Unit not levelled Level as required.
Poor pumping Check and/or replace the water pump.
Cubes too large Cube size control set improperly Check and adjust for proper operation.
Decreased ice capacity Inefficient compressor Replace.
Leaky water valve Repair or replace.
Non-condensable gas in system Purge the system.
Poor air circulation or excessive Relocate the unit or provide for
hot location more ventilation.
Overcharge of refrigerant Correct the charge. Purge off slowly.
Capillary tube partially restricted Blow charge, add new gas & drier,
after evacuating system with
vacuum pump.
Undercharge of refrigerant Charge to data plate indication.
Discharge head pressure too high See incorrect discharge pressure.
Clogged air filter Clean or replace.
Poor harvest Restriction in incoming water line Check water valve strainer and flow
control. If necessary enlarge the
flow control orifice.
Too short defrost time Check temperature control.
Replace if necessary.
Cube size control set for too large Re-set cube size control.
cubes
Water inlet valve not opening Valve coil with open winding.
Replace valve.
Hot gas valve orifice restricted Replace hot gas valve assy.
Air vented holes in mold cups plugged Clean out holes.
Discharge head pressure too low See incorrect discharge pressure
Unit won't harvest Inoperative cube size control Replace cube size control
Hot gas valve not opening Valve coil with open winding.
Replace valve.
Water solenoid valve not opening Valve coil with open winding.
Replace valve.
Incorrect discharge pressure Dirty air filter Clean or replace.
Inoperative hi press control Replace.
(Water cooled)
Water inlet valve to condenser Clean or replace.
partially clogged
Excessive water in unit base Water tubing leaking Check. Tighten or replace.
SERVICE DIAGNOSIS