IV. Service Diagnosis
WARNING
1.This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire.
2.Risk of electric shock. Use extreme caution and exercise safe electrical practices.
3.Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.
4.CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after the unit is serviced. Make sure that none have fallen into the storage bin.
5.Make sure all food zones in the icemaker and storage bin are clean after the unit is serviced. For cleaning procedures, see "VI. Cleaning and Maintenance."
A.Diagnostic Procedure
The diagnostic procedure is basically a sequence check which can be used at unit startup or for system diagnosis. This procedure allows you to diagnose electrical system and component failures. Before conducting the diagnostic procedure, check for correct installation, proper voltage per unit nameplate, and adequate water supply. Check
CB using the steps in "IV.B. Control Board Check." Check the dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, & 10 and S5 dip switch 1 through 5 ("G" CB) are in the factory default position. S4 dip switch 1, 2, 5, & 6 are cleaning adjustments and the settings are flexible. For factory default settings, see "II.C.3.a) Default Dip Switch Settings." As you go through the procedure, check to assure the components energize and
1)Turn off the power supply, then access the control box. Clear any ice from TBC or MBC.
2)Turn on the power supply, then move the control switch to the "ICE" position. A
5‑second delay occurs. The red "POWER OK" LED on CB comes on. On "G" CB, the green "BC CLOSED" LED also comes on. If the yellow "BC OPEN" LED is on (indicating a full bin), check MBC. See "IV.C.2.a) Mechanical Bin Control Check."
WARNING
1.Risk of electric shock. Use extreme caution and exercise safe electrical practices.
2.Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.
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