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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: Conrm 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 lling the reservoir, check for 24VAC at
CBK2connector between pin #8 (W/BR) and a neutral (LBU). If the "WTRIN" LED is
on and 24VAC is not present between CB K2 connector pin # 8 (W/BR) and neutral
(LBU), conrm 24VAC at CB K2 connector between pin #7 (W/R) and a neutral (LBU).
If 24VAC is present between CB K2 connector pin #7 (W/R) and a neutral (LBU) and
not between CBK2connector pin #8 (W/BR) and a neutral (LBU), replace CB.
24VAC CB K2 Connector
Connector Pin # (Wire Color) To Neutral (LBU)
LFS
Open
LFS
Closed
K2 (CB input power) Pin #7 (W/R)
To
K8 pin #2 (LBU)
24VAC 24VAC
K2 (WV power) Pin #8 (W/BR) 0VAC 24VAC
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 (DBU) to a neutral (W).
If 115VAC is not present, conrm 115VAC from CB K1 connector pin #2 (BR) to a
neutral (W). If 115VAC is present on CB K1 connector pin #2 (BR) but not on CB
K1 connector pin #3 (DBU), replace CB.
5) Freeze Cycle–"GM" and "COMP" LED are on: 5-minute ice purge timer 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 5-minute ice purge timer terminates, "COMP" LED turns on. If not,
replace CB. If "COMP" LED turns on and Comp does not start, check for 115VAC from
the CB X1 relay (BR) and (R) to a neutral (W). If 115VAC is present on CB X1 relay (BR)
and not on CB X1 relay (R), replace CB.
Legend: AM–agitating motor; BC–bin control; CB–control board; Comp–compressor;
CT–control transformer; DCT–drain cycle timer (1-hr.); DV–drain valve;
DVT–drain valve timer (2-sec.); FM–fan motor; FT–ll timer (90-sec. low water
safety); GM–gear motor; GMPR–gear motor protect relay; IPT–ice purge timer;
LFS–lower oat switch; UFS–upper oat switch; WV–inlet water valve