Cornelius WCF1411-A Electrical Checkout, Overload Check, Compressor Check, Capacitor Check

FIGURE 9. OVERLOAD CHECK

FIGURE 10. COMPRESSOR CHECK

Continuous Flow Icemaker Service Manual

ELECTRICAL CHECKOUT

1.Be sure the unit is disconnected from the power source. Remove the compressor electrical box cover. Check for obvious damage and loose wires.

2.Disconnect the fan motor leads. Since capacitors store energy, short the capacitor with a screwdriver. This will prevent shocks.

3.Disconnect the compressor terminal wires.

OVERLOAD CHECK

Using a volt–ohmmeter check the continuity across the overload, contact #1 and #3. If none, wait for unit to cool down and try again. If still no continuity, the overload protector is defective and should be replaced.

COMPRESSOR CHECK

The resistance readings on the windings will be between 0.25 to 10.00 ohms, a meter capable of these low readings must be used.

1.Check between “C” and “R.” Replace the compressor if there is no continuity as the run windings are open.

2.Check between “C” and “S.” Replace the

compressor if there is no continuity as the start windings are open.

3.Check between “C” and “R” or “S” and the shell of the compressor. If there is continuity, replace the compressor as the motor is grounded.

4.Check between screw terminal on the overload and “C” on the compressor. Check and repair the lead or connections if there is no continuity.

CAPACITOR CHECK

1.Check or replace start capacitor, disconnect bleed resistor before checking for shorted capacitor.

2.Check or replace run capacitor (if supplied) check for shorted capacitor or either terminal grounded to case.

SAFETY CONTROLS

Your icemaker unit has several safety and control devices incorporated into its design.

WARNING: None of the below described devices should ever be “bypassed” to allow the unit to function.

The safety and control system shut–off devices are:

1.Low water shut off reed switch located in icemaker float assembly. (Automatic reset type.)

2.Gearmotor thermal overload, manual reset type (red button on motor).

3.Compressor thermal overload, automatic reset type.

4.Anti–freeze relay and associated circuit. See wiring diagrams.

5.Main service switch located on top of the control box.

6.Bin Control.

7.High pressure cut out (water cooled only).

Publication Number: 630460324SER - 14 - © 2006, IMI Cornelius Inc.