Generation Ii Control Logic Board - Taylor 336 Service Manual

Generation II Control Logic Board

The Generation II logic board's primary function is to interpret
modes of operation. The board monitors mix levels and
temperatures by sending commands to the control's power
board. Commands are sent via a ribbon cable, enabling the
proper relays on the power board to open or close. (See
illustration on page 22.)
Function:
Interpret a mode of operation/monitor mix level and
temperature/monitor product viscosity or product temperature
and send a command to the power board through a ribbon
cable enabling the proper relays on the power board to be
open or closed.
Logic Board (Part Numbers):
The part number for the Generation I logic board is
X32325-SER.
As of July, 1996 we have modified the differential on
Generation II controls from 13'F/7.2'Cto4.5'F/2.5-C in order
to meet the new NSF mix temperature requirements. The
new control has a shunt (jumper) to select proper
temperatures. This shunt is located beneath the dip
switches on the left side of the control. The shunt is set in
the upper position for 4.5*F/2.5'C differential for use on mix
hopper systems and in the lower position for 13' F/7.2-C
differential for use on mix cabinet systems. The new control
is compatible with older units. This change will require new
part numbers as follows:
Old Part No.
X36641-SERGen. II
X38523-SER Gen. ll-W/Chime
X41072-SER Gen. II-W/EVC
X42002-SER Gen. ll-Hopper Pump
Power Board (Part Numbers):
X32326-SER - Soft Serve
X34983-SER - Shake
Thermistor Probes:
There are three types of thermistor probes used on softech
freezers. The resistance value of the thermistor probes
corresponds with the temperature. As the temperature
becomes warmer, the probe resistance decreases.
X31602 - Barrel Probe (Senses product in
freezing cylinder.)
X34466 - Hopper Probe (Senses temperature
of mix in hopper.)
X50717 - Hopper (Senses temperature of mix in
hopper with new Generation II.)
X36267 - Cabinet Probe (Senses mix cabinet
air temperature.)
Approximate probe resistance readings:
10,000 OHMS at room temperature (77°F/25°C).
30,035 OHMS at hopper/cabinet temperature
(35°F/2°C).
38,830 OHMS at shake temperature (26°F/-3.3°C).
48,636 OHMS at soft service temperature (18°F/-7.7°C).
New Part No.
X36641SER1
X38523SER1
X41072SER1
X42002SER1