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1. Operation Diagnosis
1) Startup Cycle: Turn on the power supply. Move the control switch to the "ICE" position.
"on" appears on CB display. HGV energizes and Comp/AMD 30-sec. delay timer starts.
Note: • CB display "on" LED remains on unless the 10.5VAC power supply to CB CN1 is
interrupted.
• Check CB using the steps in "II.C.Control Board Check."
• Confirm BC is CLOSED. If BC is open, remove ice from BC. If no ice is around
BC and icemaker does not start, see "II.D. Bin Control Check."
a) Startup Cycle Diagnosis: If CB "on" is off, confirm 5A fuse is good. Check for
115VAC at CS #2 (DBU) to neutral (W) then at CS #1 (R) to neutral (W). If 115VAC
is present on #2 (DBU) and not on #1 (R), replace CS. If 115VAC is present on
CS #1 (R), check for 115VAC at HPS (R) to neutral (W) then HPS (LBU) to neutral
(W). If 115VAC is present at HPS (R) and not at HPS (LBU), HPS is open. See
HPS Diagnosis below. If 115VAC is present at HPS (LBU), check for 10.5VAC at
CB CN1 #1 red wire to CB CN1 #2 red wire. If 10.5VAC is not present, check CT
continuity. If open, replace CT. If 10.5VAC is present and "on" is not on CB display,
replace CB.
b) HPS Diagnosis: Confirm 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 or strainer.
Freeze Cycle: FM, TXV, drier, and fan blade for binding.
Confirm that the location meets installation requirements. See the appliance's
instruction manual for details.
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