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3) Fill Cycle–"WTRIN" LED is on: "WTRIN" LED turns on only when the reservoir water
level is low enough to open LFS. Diagnosis: Confirm LFS is open. If "WTRIN" LED
is off and LFS is open and the control switch is in the "ICE" position (open), replace
CB. If "WTRIN" LED is on and water is not filling the reservoir, check for 24VAC at
CB K2 connector between pin #8 (O) and neutral (LBU). If the "WTRIN" LED is on
and 24VAC is not present between CB K2 connector pin # 8 (O) and neutral (LBU),
confirm 24VAC at CB K2 connector between pin #7 (W/R) and neutral (LBU). If 24VAC
is present between CB K2 connector pin #7 (W/R) and neutral (LBU) and not between
CB K2 connector pin #8 (O) and neutral (LBU), replace CB.
Connector
K2 (CB input power)
K2 (WV power)
4) Ice Purge Cycle–"GM" LED is on: "GM" LED turns on once UFS closes (reservoir
full). If UFS is closed and "GM" LED is off, replace CB. If "GM" LED is on but GM does
not start, check for 115VAC from CB K1 connector pin #3 (BK) to neutral (W).
If 115VAC is not present, confirm 115VAC from CB K1 connector pin #2 (BR) to neutral
(W). If 115VAC is present on CB K1 connector pin #2 (BR) but not on CB K1 connector
pin #3 (BK), replace CB. Once GM energizes, CCR energizes and PT (1-min. "F-A" CB
E-0 (H) and later and "F-C" CB dip switch 8 off or 5-min. "F-A" CB E-0 (G) and earlier
dip switch 8 on) starts.
5) Freeze Cycle–"GM" and "COMP" LED are on: PT (1-min. "F-A" CB E-0 (H) and later
and "F-C" CB dip switch 8 off or 5-min. "F-A" CB E-0 (G) and earlier dip switch 8 on)
terminates or press the "SERVICE" button on CB after the "GM" LED turns on to bypass
ice purge cycle. WARNING! Risk of electric shock. Care should be taken not to
touch live terminals. After PT terminates (1-min. "F-A" CB E-0 (H) and later and
"F-C" CB dip switch 8 off or 5-min. "F-A" CB E-0 (G) and earlier dip switch 8 on),
"COMP" LED turns on. If not, confirm CCR contacts are closed. See step "2a)3.
Compressor control relay" above. If CCR contacts are closed, replace CB. If "COMP"
LED turns on and Comp does not start, check for 115VAC from the CB X1 brown (BR)
wire and red (R) wire to neutral (W). If 115VAC is present on CB X1 brown (BR) wire
and not on CB X1 red (R) wire, replace CB. If 115VAC is present on CB X1 red (R) wire
and Comp is not energized, CB operation confirmed, check Comp external overload,
start capacitor, start relay, motor windings, locked rotor.
Legend: AM–agitating motor (gear motor this model); BC–bin control; CB–control board;
CCR–compressor control relay; Comp–compressor; CT–control transformer;
DV–drain valve; FM–fan motor; FT–fill timer (90-sec. low water safety);
GM–gear motor; PT–purge timer; LFS–lower float switch; UFS–upper float switch;
WV–inlet water valve
24VAC CB K2 Connector
Pin # (Wire Color)
To
Pin #7 (W/R)
To
Pin #8 (O)
22
Neutral (LBU)
K8 pin #2 (LBU)
LFS
LFS
Open
Closed
24VAC
24VAC
0VAC
24VAC
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