Hoshizaki F-500BAJ Service Manual page 21

5) Fill "WTRIN" LED is on: 24VAC is present at CB K2 #9 (W/R) at all times. If not,
confirm 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, fill timer (FT) starts, freeze
timer (FZT) terminates (only during normal operation), and WV energizes. If LFS is
open and "WTRIN" LED is off, confirm 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, confirm 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 CCR energize and 5-min. ice purge timer starts. If GM does not
energize 5 sec. after UFS closes, confirm UFS status. See "II.E. Float Switch Check and
Cleaning." If UFS is closed and GM LED does not turn on, replace CB. If "GM" LED is
on and GM and CCR 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, Comp and FM energize. If "COMP" LED is
on and Comp and FM 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) Refill "WTRIN" LED is on: See "I.B.2.10) Refill Cycle – "GM", "COMP", and "WTRIN"
LEDs are on" above.
9) Shutdown:See "I.C.3)D) Bin Control" above.
Legend: BC–bin control; CB–control board; Comp–compressor; CCR–compressor control
relay; FS–float switch; GM–gear motor; LFS–lower float switch; UFS–upper float
switch; WV–inlet water valve
21