Service Manual

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6) Startup – CB "POWER OK" LED is on. Plug the icemaker back into the electrical
outlet, then move the power switch to the "ON" position. Move the control switch to the
"ICE" position. CB "POWER OK" LED and BC green LED turn on.
Diagnosis CB "POWER OK" LED: If CB"POWER OK" LED is off, check for proper
supply voltage (115VAC) input to CT. If 115VAC is not present, check the power switch
and breaker. Next, check for proper 24VAC output voltage from CT. Check CBK8
#1 (W/R) to #2 (LBU) for 24VAC. If 24VAC is not present and 1A 24VAC fuse is good,
replace CT. If 24VAC is present and CB "POWER OK" LED is off, replace CB.
Diagnosis BC (infrared sensor): Check that BC green LED is on. If CB "POWER
OK" LED is on and BC green LED is off, check CB K6 #1 (DBU) to CB K6 #3 (BR)
for 20VDC. If20VDC is not present, conrm S1 dip switch 7 is in the "ON" position.
IfS1dip switch 7 is in the "ON" position and 20VDC is not present, replace CB. IfBC
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 BC yellow LED is still on or ashing after cleaning
the lens, replace BC.
7) Fill Cycle – "WTRIN" LED is on. Reservoir is empty and LFS and UFS are open.
FTstarts. WV energizes and ll cycle starts. LFS closes. Nothing happens at this time.
Reservoir continues to ll until UFS closes. When UFS closes, FT terminates, WV
de-energizes and CB "WTRIN" LED turns off. FZTand 30-sec. GM delay timer start.
IfUFS remains open longer than 90 sec. after LFS opens, FTexceeded and CB sounds
a 1-beep alarm. WVremains energized until UFS closes. Alarm resets automatically
when UFS closes. Diagnosis: If reservoir is empty and "WTRIN" LED is off, conrm
LFS status.
See "II.F.1. Float Switch Check." If LFS 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 WVscreen. If "WTRIN" LED is on and WV is off,
check CB K2 #8(O) to a neutral (LBU) for 24VAC. If 24VAC 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 rell
exceeds FT with no water in the reservoir, check for DV leaking. Ifreservoir is full and
overowing check for open UFS. See "II.F.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. IfWV de-energizes and water continues to ll the
reservoir, replace WV.