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3) Power On: Turn on the power supply, then move the control switch to the "ICE" position.
A 5-sec. delay occurs. CB red "POWER OK" LED and CB green "BC CLOSED" LED
turn on. If CB yellow "BC OPEN" LED is on (indicating a full bin), check BC. Move ice
away from BC actuator paddle. If CB yellow "BC OPEN" LED stays on, see "II.D.1. Bin
Control Check."
Note: • CB red "POWER OK" LED remains on unless the 10.5VAC power supply is
interrupted (K2 connector).
• Check CB using the steps in "II.C. Control Board Check."
• Confirm CB green "BC CLOSED" LED is on. If CB yellow "BC OPEN" LED is on,
remove ice from BC. If no ice is around BC and yellow "BC OPEN" LED is on,
see "II.D.1. Bin Control Check.
a) Power On Diagnosis: If CB red "POWER OK" LED is off, confirm 10A fuse on
both the KMS and the SRK are good. Confirm wire harness is connected and not
damaged. Next, check SRK switches. Check for 115VAC at both HPS wires (BR) to
neutral (W). If 115VAC is present on one and not the other, HPS is open. If HPS is
open, see "b) HPS Diagnosis" below. If HPS is closed, check for 115VAC at both
DLT wires (BR) to neutral (W). If 115VAC is present on one and not the other, DLT
is open. If DLT is open, see "c) DLT Diagnosis" below. If DLT is closed, go to KMS
and check for 115VAC at BC wires (BK) to neutral (W). If 115VAC is present on
one and not the other, BC is open. See "II.D.1. Bin Control Check." If BC is closed,
check for 115VAC at control switch #1 (BR) to neutral (W) then at control switch
#2 (BK) to neutral (W). If 115VAC is present on #1 (BR) and not on #2 (BK), replace
control switch. If 115VAC is present on control switch #2 (BK), check for 10.5VAC at
CB K2 #1 red wire to CB K2 #2 red wire. If 10.5VAC is not present, check CT wire
connections and CT continuity. If open, replace CT.
b) HPS Diagnosis: Check that all shutoff valves (4 total) are open and 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: HGVs, strainer, or check valve.
Freeze Cycle: FMR, TXV, HM, LLVs, strainer, check valve, drier, and damaged line
set or fitting.
c) DLT Diagnosis: Check that the condenser coil is not clogged or restricted. Let
discharge line thermostat cool, if DLT does not close, replace DLT. Once closed,
restart appliance, once Comp starts, check voltage and amp draw.
See "5a),a) Comp Diagnosis" below.
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