Service Manual

10
B. Service Diagnosis
WARNING
• The appliance should be diagnosed and repaired only by qualied service
personnel to reduce the risk of death, electric shock, serious injury, or re.
• Risk of electric shock. Use extreme caution and exercise safe electrical practices.
• Risk of electric shock. Control switch in "OFF" position does not de-energize all
loads Use extreme caution and exercise safe electrical practices.
• Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after the appliance is serviced. Make sure that none have fallen
into the dispenser unit/ice storage bin.
• Make sure all food zones in the appliance are clean after service.
The diagnostic procedure is a sequence check that allows you to diagnose the electrical
system and components. Before proceeding, check for correct installation, proper voltage
per nameplate, and adequate water supply. Check that the 5A fuse is good. Check CB
using the steps in "II.C. Control Board Check."
Note: • When checking high voltage (115VAC), always choose a white (W) neutral wire to
establish a good neutral connection.
• When checking voltage from the CB connectors, pull CB connectors out slightly
to allow room for multimeter test leads contact.
• If the icemaker has an error code, see "III.F. Error Codes."
• CB monitors the following with 5VDC during the icemaking process: evaporator
thermistor (ET) and bin control (BC). When 5VDC is present across either of
these, the switch is open.
1) Remove the front panel. Move the control switch to the "OFF" position, then unplug the
appliance from the electrical outlet.
2) Clear any ice from BC.