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21
6) Startup–CB "POWER OK" LED is on. Turn on the power supply, then move the power
switch to the "ON" position. Make sure the control switch is in the "ICE" position.
CB "POWER OK" LED and IS (BC1 if applicable) green LED turn on.
Diagnosis CB "POWER OK" LED: Check that CB "POWER OK" LED is on. Ifnot,
check for 115VAC at control transformer brown (BK on 115VAC models (except
FD-650M_H-C) and BR on 208/230VAC models and 115VAC FD-650M_H-C) wire to
neutral (W). If 115VAC is not present, check the power switch and breaker. If 115VAC
is present, check control transformer continuity. Replace as needed. Next, check for
24VAC at control transformer red (R) wire to neutral (LBU). If 24VAC is not present,
check control transformer continuity. Replace as needed. If24VAC is present, check
24VAC 1A fuse. If fuse is good, check for 24VAC at CB K8 #1 (W/R) to CB K8 #2 (LBU).
If 24VAC is present and "POWER OK" LED is off, replace CB.
Diagnosis BC(2) (mechanical stand-alone or backup): Check that the actuator
paddle is properly positioned. Check continuity across BC(2). If open, replace BC(2).
Next, check VDC at CB K8#3(GY) to CB K8 #4 (GY). When BC(2)is closed 0VDC is
read. Move the actuator paddle to open BC(2). When open, 5VDCis present between
CB K8 #3 (GY) and CB K8#4(GY). If 5VDC is not present when BC(2) is open, replace
CB. Return actuator to its normal position.
Diagnosis BC1 (infrared sensor): If "POWER OK" LED is on and BC1 green LED
is off, check 20VDC at CB K6 #1 (DBU) to CB K6 #3 (BR). If 20VDC is not present,
conrm dip switch 7 is in the "ON" position. If dip switch 7 is in the "ON" position and
20VDC is not present, replace CB. If BC1 yellow LED is on or ashing, move ice away
from lens. If no ice is present, clean the lens with a warm, clean damp cloth. If cleaning
the lens does not work, replace BC1.
7) Fill Cycle – "WTRIN" LED is on. Reservoir is empty and LFS and UFS are open.
90-sec. FT starts. WV energizes and ll cycle starts. LFS closes. Nothing occurs at this
time. Reservoir continues to ll until UFS closes. When UFS closes, WV de-energizes,
90-sec. FT is terminated, and CB "WTRIN" LED turns off. 30-min. FZTand 30-sec.
GM delay timer start. IfUFS remains open longer than 90 sec. after LFS opens,
FTexceeded and CB sounds a 1-beep alarm. WVremains energized until UFS closes.
Alarm resets automatically when UFS closes. Diagnosis: If reservoir is empty and
"WTRIN" LED is off, conrm LFS status. See "II.E.1. Float Switch Check." IfLFS is open
and "WTRIN" LED is off, replace CB. If "WTRIN" LED is on, check that the reservoir lls.
If not, check water supply line shut-off valve, water lters, and WVscreen. If "WTRIN"
LED is on and WV is off, check CB K2 #8(O) to a neutral (LBU) for 24VAC. If24VAC is
not present, check CB K2 #9(W/R) to a neutral (LBU) for 24VAC. If 24VAC is present
on CB K2 #9(W/R)and not on CB K2 #8 (O), replace CB. If 24VAC is present on
CB K2 #8(O), check continuity through WV solenoid. If open, replace WV. If WV is
energized and rell exceeds FT with no water in the reservoir, check for DV leaking.
Ifreservoir is full and overowing check for open UFS. See "II.E.1. Float Switch Check."
If UFS is closed, check that WV de-energizes. If not, check CB K2 #8 (O) to a neutral
(LBU) for 24VAC. If 24VAC is present, replace CB. IfWV de-energizes and water
continues to ll the reservoir, replace WV.
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