Vogt VT100, Service Manual

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Vogt
®
VT Service Manual 5-3
Electrical Controls
Clean Mode.
The “Clean” mode is considered to be a maintenance or service function of the machine.
During this mode only the water pump will run.
The water pump can be stopped by simply moving the “Selector Switch” from the “Clean” to the “Off”
position. To restart the water pump, move the “Selector Switch” back to the “Clean” position and press the
“Manual Harvest (Start)” button. Ice machine cleaning solution can be circulated though the tubes to
accomplish the cleaning procedure. If the water pump is left to run in the clean mode for more than two
hours, the PLC will shut the machine off. The clean mode can be resumed by pushing the “Manual Harvest”
button.
NOTE: Running in Clean mode for extended period of time can cause excessive pressure to build up in the
freezer.
At the termination of the clean mode, the machine can be returned to ice making mode by putting the
“Selector Switch” in the “Ice” position and pressing the “Manual Harvest” button.
Fault Mode.
The VT Series is equipped with a PLC (programmable logic controller) that controls all
aspects of the operation. One of the functions of the PLC is to shut down the machine when a problem
arises and send a signal to the fault indicator light located on the front of the electrical panel. (Figure 5-3)
The red light will blink 1 to 6 times when a problem has caused the machine to shut down.
See table below for the description of the fault modes.
# Description
Switch Reset
(Auto or Manual)
1 Low Suction Pressure Auto
2 High Discharge Pressure Manual
3 Low Oil Pressure Manual
4 Long Harvest Cycle N/A
5 Cutter Motor Auto
6 Pumpdown Fault N/A
Solid Power Failure N/A
TABLE 5-1
PLC Fault Codes
FIGURE 5-3
Lowside Control Panel Front
Fault Indicator Light
Flashes to indicate the
fault that
occurred
Control Circuit Power Light
Light will be “on” if power is being
supplied from the Highside