Electrical Checkout; Overload Check; Compressor Check; Capacitor Check - Cornelius WCF1411-A Series Service Manual

Continuous Flow Icemaker Service Manual
E C
LECTRICAL HECKOUT
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.
O C
VERLOAD HECK
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.
C C
OMPRESSOR HECK
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.
C C
APACITOR HECK
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.
S C
AFETY ONTROLS
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
FIGURE 9. OVERLOAD CHECK
FIGURE 10. COMPRESSOR CHECK
- 14 - © 2006, IMI Cornelius Inc.