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27
c) Compressor Control Relay/Gear Motor Protect Relay (CCR/GMPR) –
CB K9 #5(W/O) and CB K9 #6 (W/O): 5VDC is present from CB white K5 connector,
pin closest to CB red K4 connector to CB K9 #5 (W/O) at all times. If 5VDC is not
present, replace CB. When CCR/GMPR terminals #3 (W/O) and #4 (W/O) are open
(CCR/GMPR de-energized), 5VDC is present between CB K9 #5 (W/O) and CB K9
#6 (W/O). When CCR/GMPR terminals #3(W/O) and #4 (W/O) are closed (CCR/
GMPR energized), 5VDC is present between CB K9 #5 (W/O) and CB K9 #6 (W/O).
When CCR/GMPR terminals #3 (W/O) & #5 (W/O) are open CB may be in an
8-beep alarm. See "III.A.2. LED Lights and Audible Alarm Safeties."
d) Bin Control (2) (mechanical stand-alone or backup) –
CB K8 #3 (GY) and CB K8 #4(GY): 5VDC is present from CB white K5 connector,
pin closest to CB red K4 connector to CB K8 #3 (GY) at all times. If 5VDC is not
present, replace CB. When BC(2) is closed (calling for ice), 5VDC is present from
CB white K5 connector, pin closest to CB red K4 connector, to CB K8 #3 (GY) and
CB K8 #4(GY). If 5VDC is not present to either CB K8 #3 (GY) or CB K8 #4(GY),
replace CB. If 5VDC is present at CB K8 #3 (GY) and not to CB K8 #4 (GY), BC(2) is
open. See "II.D.2. Bin Control (2) (mechanical stand-alone or backup) Check."
e) Float Switch (LFS and UFS) – CB K8 #5 (BK) (common), CB K8 #6(R) (upper),
and CB K8 #7 (BU) (lower): 5VDC is present from CB white K5 connector pin closest
to CB red K4 connector to CB K8 #5(BK) (common) at all times. If not, replace CB.
5VDC is present from CB white K5 connector pin closest to CB red K4connector
to CB K8 #6 (R) (upper) and CB K8 #7 (BU) (lower) when FS is open. If 5VDC
is present between CB K8 #5 (BK) and CB K8 #6 (R) (upper) or CB K8 #7 (BU)
(lower), FS is open. Forfurther FS diagnostics, see "II.E. Float Switch Check and
Cleaning."
5) Fill "WTRIN" LED is on: 24VAC is present at CB K2 #9 (W/R) at all times. If not,
conrm 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, conrm 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). If24VAC
is not present at CB K2 #8(O), replace CB. "WTRIN" LED turns off once UFS closes.
Ifnot, conrm UFS status. See "II.E. Float Switch Check and Cleaning." IfUFS 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.
If24VAC is not present, check WV diaphragm.
6) Ice Purge Cycle "GM" LED is on: When UFS closes, GM delay timer starts (5 or
30sec. depending on CB S1 dip switch #7). Once GM delay timer terminates, "GM"
LED turns on, GM and EH (-C model except FD-650) energize and 5-min. ice purge
timer starts. If GM does not energize 30 sec. after UFS closes, conrm 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 are off, check for 115VAC from
CBK1#2to 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
#3to a neutral (W). If115VAC is present on CB K1 #2and not on CB K1 #3, replace
CB.
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