Technical information

12/01/02
closes a magnetic proximity switch. The control is con-
nected to the red K5 connector on the control board
through a resistor harness. As the proximity switch
opens or closes, the resistance will change to signal
the control board to start up or shut down. The control
board will only respond to this change in resistance
during the first 5 minutes of each freeze cycle.
Note: Dip switch # 7 must be in the ON position for
this control. When dip switch # 7 is ON, the following
2 safeties will occur if the mechanical control fails:
4 Beeps = Short circuit on K5 bin control circuit.
5 Beeps = Open circuit on K5 bin control circuit.
To reset either safety, press the white reset
button on the control board with the power ON.
CHECKOUT: To check this control with the unit running,
you must be in the first 5 minutes of the freeze cycle.
Turn the control switch to OFF and back to ICE. Allow
the unit to cycle through the 1 minute fill cycle and the
initial harvest cycle. Once the freeze cycle begins
(LED 1 ON and when you hear the pump motor start
you will know that the freeze cycle has begun), push
the control paddle to the full right position and the unit
should shut down within 3 seconds.
Another method to check this control is to unplug the
wiring harness from the K5 Red connector and check
the resistance at the end of the harness with an ohm-
meter as the proximity switch opens and closes.
1) When the control paddle is hanging in the normal
position, (Bin Empty) the resistance at the red K4
connector will be 7.9 K ohms.
2) When the control paddle is held to the full right
position, (Bin Full) the resistance at the red K4
connector will be 15.8 K ohms.
c) CAPACITIVE PROXMITY SWITCH: This control is
used on the KM-1300NRF model only. It operates with
the same sequence as the mechanical control and has
the same safeties. The difference is that this control
has a separate 24VDC power supply and operates
through a bin control relay.
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12/20/03
2/20/03