Adjustment on the overload setting, and off delay timer on the Main Control Board.
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| E20T25 (Obsolete) |
E20T48 (Current) |
Above are the two styles of control modules used in newer style control panels. These modules replace the various controls, & relays in older style control panels. These devices incorporate the overload protection, operating relay,& time delay relay.
The E20T25 is obsolete, the replacement is the E20T48. These controls are interchangeable, the only difference is the mounting holes are slightly different, if replacing the E20T25 with the E20T48, you will need to drill new mounting holes in the control panel back-plate. Operationally they are identical.
The off delay time delay adjustment should be adjusted so that the drive motor and water pump continue to run for approximately 1 minute AFTER the machine stops producing / harvesting ice. This is to ensure the blade & squeegee does not freeze to the evaporator when it shuts down.
The overload set point should be adjusted as follows: While the machine is making ice under NORMAL conditions. (Motor NOT exceeding full load amps.) Slowly turn the overload set-point counterclockwise, until the overload trips. Then turn set point clock wise, approximately 1/8 turn, above cut out point. Reset the overload, (Press overload reset switch) check to ensure unit does not trip overload during normal operating conditions. If it trips, ( and motor does not draw excessive current) then raise the set-point slightly & Try again. Click on above photos to find adjustment screw location on controls.