Service Manual

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5) Fill "WTRIN" LED is on: 24VAC is present at CB K2 #9 (W/R) at all times. If not,
conrm 24VAC from CB K2 #9(W/R) to a neutral (LBU). When LFS open at startup
or opens during normal operation, "WTRIN" LED turns on, ll timer (FT) starts, freeze
timer (FZT) terminates (only during normal operation), and WV energizes. If LFS is
open and "WTRIN" LED is off, conrm LFS status. See "II.E. Float Switch Check and
Cleaning." If LFS is open and "WTRIN" LED is off, replace CB. If "WTRIN" LED is on
and WV is not energized, check for 24VAC at CB K2 #8(O) to a neutral (LBU). If24VAC
is not present at CB K2 #8(O), replace CB. "WTRIN" LED turns off once UFS closes.
Ifnot, conrm UFS status. See "II.E. Float Switch Check and Cleaning." IfUFS is
closed and "WTRIN" LED is on, replace CB. If "WTRIN" LED is off and WV is open,
check for 24VAC at CB K2 #8 (O). If 24VAC is present at CB K2 #8 (O), replace CB.
If24VAC is not present, check WV diaphragm.
6) Ice Purge Cycle "GM" LED is on: When UFS closes, GM delay timer starts (5 or
30sec. depending on CB S1 dip switch #7). Once GM delay timer terminates, "GM"
LED turns on, GM and EH (-C model) energize and 5-min. ice purge timer starts. If GM
does not energize 5 sec. after UFS closes, conrm UFS status. See "II.E. Float Switch
Check and Cleaning." If UFS is closed and GM LED does not turn, replace CB. If "GM"
LED is on and GM and EH (-C model) are off, check for 115VAC from CBK1#2 (BK)to
a neutral (W). If 115VAC is not present, check 115VAC power supply connections from
power switch. If 115VAC is present, check for 115VAC from CB K1 #3 (P)to a neutral
(W). If115VAC is present on CB K1 #2 (BK)and not on CB K1 #3 (P), replace CB.
7) Freeze Cycle "GM" and "COMP" LED are on: The 5-min. ice purge timer terminates
or the ice purge cycle bypass button ("SERVICE") is pressed, "COMP" LED turns on.
Tobypass the 5-min. Ice Purge Cycle, press the "SERVICE" button on CB after the
"GM" LED turns on. WARNING! Risk of electric shock. Care should be taken not to
touch live terminals. 115VAC is present between CB X1 relay power supply black (BK)
wire and neutral (W) at all times. If not, check 115VAC power supply wire connections
from power switch. If"COMP" LED is not on after 5-min. ice purge timer terminates,
replace CB. When "COMP" LED turns on, CR and Comp energize. If "COMP" LED is
on and compressor relay (CR) and Comp are not, check for 115VAC from CB X1 relay
power supply black (BK) wire to neutral (W). If 115VAC is present, check X1 relay violet
(V) wire to neutral (W). If 115VAC is present on X1 relay black (BK) and not on X1 relay
violet (V), replace CB.
8) Rell "WTRIN" LED is on: See "5) Fill "WTRIN" LED is on:" above.
9) Shutdown:See "I.C.3)D) Bin Control" above.
Legend: BC–bin control; CB–control board; Comp–compressor; CR–compressor relay;
CCR–compressor control relay; EH–evaporator heater (-Cmodel); FS–oat switch;
GM–gear motor; LFS–lower oat switch; UFS–upper oat switch; WV–inlet water
valve