Taylor 161 Service Manual - page 18
14
Controls
Model 161
4.
The PUMP relay closes and opens again. The
MIX light extinguishes.
5.
The “BTR” (beater motor) relay closes and
opens again. The STANDBY light extinguishes.
6.
The “COM” (compressor) relay closes and
opens again. The WASH light extinguishes.
7.
All lights are off and a tone sounds for three
seconds. This designates the end of the first
section.
If all or most of the power board relays fail to close,
the logic board is defective. If only one relay fails to
close, the power board is defective. This test can be
used to determine if a problem exists with the logic
board, the power board, or elsewhere in the freezer.
In other words, if during the test the beater relay
closes on the power board, but the beater motor
contactor does not operate, the problem occurs after
the command reaches the power board.
Self-Test - Part II
When the first section of the self-test is complete,
the control will advance to the starting point of the
second section. The technician will have to complete
this portion of the test. The first part of this section
verifies the function of the control potentiometers
(adjustment screw).
During this test, the MIX, STANDBY, WASH, AUTO,
and PUMP lights function in direct relationship with
the “MIN” and “MAX” adjustments of the
potentiometer. In other words, when the adjustment
screw is turned all the way to “MIN”, the MIX light
will be illuminated. When the adjustment is turned all
the way to “MAX”, the light will travel down and
illuminate the PUMP light. If the screw adjustment is
made between the “MAX” and the “MIN” adjustment,
one of the other lights will illuminate depending on
the adjustment.
These lights create a bar graph which is directly
related to the product temperature. “MIX” is warm
and “PUMP” is cold.
1.
The SET POINT light is illuminated, indicating
that the control is reading the soft serve
viscosity potentiometer.
2.
Rotate the adjustment screw back and forth
from “MIN” to “MAX”. The bar graph should
travel accordingly. This indicates that the
potentiometer is functional.
If the bar graph lights do not react, the logic
board is defective.
IMPORTANT: If the freezer’s controls
have been set previously, return the adjustment
to its original position. For example, if the
WASH light was illuminated before an
adjustment screw was rotated - - before going
to the next step - - rotate the adjustment screw
until the WASH light is illuminated again.
3.
Press the MIX key once.
4.
The MIX LOW light is illuminated, indicating
that the control is reading the MIX
potentiometer.
5.
Rotate the adjustment screw as in Step 2.
6.
Press the MIX key once.
7.
The MIX OUT light is on, indicating the control
is reading the STANDBY potentiometer.
8.
Rotate the adjustment screw as in Step 2.
9.
Press the MIX key once.
10.
The MIX LOW light is illuminated, indicating
that the control is reading the “MIX 1” terminal.