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3. 60 seconds after the "GM" LED comes on, the "COMP" LED comes on, and the
compressor and fan motor start. If the "COMP" LED does not come on 60 seconds
after the gear motor starts, check that the gear motor protect relay contacts (connector
K terminals 1 and ) have closed. If the "COMP" LED is on and the compressor and
fan motor did not start, check for 115/10V at X (LBU) and X (BR) on the control
board to neutral. If the "COMP" LED is on and there is voltage at X (BR) to neutral
and no voltage at X (LBU) to neutral, the control board is bad and should be replaced.
See wiring diagram "III.C.3. Freeze Cycle" for further details.
c) Dispensing Components
See "IV.C.5. Opti Serve (OS) Sensors."
E. Float Switch
Depending on local water conditions, scale may build up on the float switch. Scale on the
switch can cause the floats to stick. In this case, the float switch should be cleaned and
checked.
First, remove the switch from the water tank. Soak the switch assembly in ice machine
cleaner. While not necessary, the floats can be removed from the shaft during cleaning.
If you remove them, note that the blue float is on top. The floats must be installed with
the magnets inside them towards the top of the switch. Installing the floats upside down
will affect the timing of the float switch operation. Once clean, rinse and wipe the cleaner
off. Next, check the switch with an ohm meter. This float switch has three wires (the
black wire is common) and two separate switches. Check the upper switch by ohming
out the black and red wires. When the float is up, the switch should be closed. Check the
lower switch by ohming out the black and blue wires in the same manner. If either switch
fails, the assembly should be replaced.
Red (upper)
Black (common)
Blue (lower)
Upper Float (blue)
Magnet (towards top)
Magnet (towards top)
Lower Float (white)
Plastic Retainer Clip
Spring Retainer Clip
