1."E" and "G" Control Board without Harvest Pump Timer Diagnosis
3)Power On: Turn on the power supply, then move the control switch to the "ICE" position. A 5‑sec. delay occurs.
•"E" Control Board: CB red "POWER OK" LED turns on.
•"G" Control Board: CB red "POWER OK" LED and green "BC CLOSED" LED turn on.
Note: • CB red "POWER" LED remains on unless the 10.5VAC power supply is interrupted (K2 connector).
•Check CB using the steps in "II.C. Control Board Check."
•"G" CB: If yellow "BC OPEN" LED is on (indicating a full bin), check MBC.
See "II.D.2. Mechanical Bin Control Check and Cleaning."
a)Power On Diagnosis: If CB red "POWER OK" LED is off, confirm closed TBC and 10A fuse is good. If TBC is open, remove ice from bulb and warm bulb in hand. If TBC does not close, replace TBC. See "II.D.1. Thermostatic Bin Control Check." Check for 115VAC at control switch #1 (BR) to neutral (W) then at control switch #2 (P) to neutral (W). If 115VAC is present on #1 (BR) and not on #2 (P), replace control switch. If 115VAC is present on control switch #2 (P), check for 115VAC at HPS (P) to neutral (W) then HPS (BK) to neutral (W). If 115VAC is present at HPS
(P)and not at HPS (BK), HPS is open. See HPS Diagnosis below. If 115VAC is present at HPS (BK), check for 10.5VAC at CB K2 #1 red wire to CB K2 #2 red wire. If 10.5VAC is not present, check that the cleaning valve is closed and the interlock switch is closed. Next, check CT continuity. If open replace CT.
b)HPS Diagnosis: Check that the condenser coil is not clogged or restricted. Let refrigeration circuit pressures equalize. If HPS does not reset and pressures are equalized, replace HPS. If pressures are not equalized, reclaim refrigerant and diagnose refrigeration circuit restriction. Check that there are no restrictions in the refrigeration circuit.
Harvest Cycle: HGV, strainer, or check valve.
Freeze Cycle: FM, FMR, TXV, HM, LLV, strainer, check valve, drier, and damaged line set or fitting. Also confirm WRV opens in freeze cycle.
Confirm that the location meets installation requirements:
•The icemaker is not intended for outdoor use. Normal operating ambient temperature should be within 45°F to 100°F (7°C to 38°C).
•Allow 6" (15 cm) clearance at rear, sides, and top for proper air circulation and ease of maintenance and/or service should they be required.
•The appliance should not be located in a corrosive environment.
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