Vollrath Stoelting F231, Service Manual, Page: 45 / 63

Service Manual #513659 37 Model F231
SECTION 6
ELECTRICAL AND MECHANICAL CONTROL SYSTEMS
NOTE
The wiring diagram is available in Section 8.
6.1 INTELLITEC2™ CONTROL
The IntelliTec2™ control consists of three main compo-
nents; a control board, a display board and a membrane
switch (touchpad).
The control board is modular and consists of a program
board and a relay board. The two boards make it easy to
service and replace. The boards are connected by two
screws.
6.2 CONTACTORS
The F231 has a total of three contactors. One for the com-
pressor and one for each drive motor. The contactors are
located in the electrical box behind the right side panel.
The IntelliTec2™ control sends electronic signals to trig-
ger the contactors. Separate signals are used to control
each drive motor contactor and the compressor contactor.
The signals to the contactors are staggered, so the drive
motor will always start three seconds before the compres-
sor. By staggering the starting and stopping of the drive
motor, maximum starting torque is available and voltage
spikes are reduced.
A. CONTACTOR TESTS
The following tests will show if a contactor is working
properly.
1. Listen for the contactor to close. When the spigot
is opened or the Push To Freeze button is pressed,
the drive motor contactor will close. After three
seconds, the compressor contactor will close.
2. Check to ensure contactor is receiving signal.
Read voltage across the coils of the contactor
during a freezing cycle. Voltage should be about
230V. If there is no voltage reading, refer to Section
7 Troubleshooting.
Figure 6-1 IntelliTec2™ Control Board
Figure 6-2 Display Board