Vogt HEC-10, Service Manual

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HEC-Series Service Manual
ELECTRICAL CONTROLS & THEIR FUNCTIONS
10/21/01
6-11
Initiated by the following:
1. Open the SVI switch.
2. Set the “Clean” button to the “On” position.
3. Set the “Ice” button to the “On” position.
4. Push both the “Harvest” and “Start” buttons simultaneously.
At this point, the machine “fault” can be identified and necessary corrections or adjustments can be
made for returning the machine to good working order. A “fault” will be identified by illumination of
specific numbered PLC output indicator lights on the PLC. See “Fault Identity”, TABLE 6-2.
To exit the troubleshoot mode, follow this sequence:
1. Set the “Clean” button to the “Off” position.
2. Set the “Ice” button to the “Off” position.
3. Close the SVI switch.
4. This will return the machine to the “Start-Up” mode.
Output Light Fault # Fault Description
ll¬l¬l
#10 High or low pressure cutout during freeze cycle
ll¬l¬¬
#11 High or low pressure cutout during harvest cycle
ll¬¬ll
#12 High or low pressure cutout during partial pumpdown
ll¬¬l¬
#13 High or low pressure cutout during total pumpdown
ll¬¬¬l
#14 Short Cycle Fault:
Three Harvests Within A Specified Time As Noted:
HEC-10 --- 10 Minutes
HEC-20 --- 10 Minutes
HEC-30 --- 5 Minutes
HEC-40 --- 5 Minutes
ll¬¬¬¬
#15 Long Freeze Cycle Fault:
One Freeze Cycle Longer Than A Specified Time As Noted:
HEC-10 --- 120 Minutes
HEC-20 --- 120 Minutes
HEC-30 --- 80 Minutes
HEC-40 --- 60 Minutes
l¬llll
#16 Power failure/compressor O/L
Note:
¬
indicates light is “On”
TABLE 6-2
Fault Identity