Taylor 161 Service Manual - page 17
13
Model 161
Controls
Service Tips for Generation II Boards
Initial Service Tips
1.
Check all connections.
2.
Check the cable to verify that it is secure.
3.
Verify that all pins are securely fastened in their
sockets.
4.
Verify that all cables correctly face away from
the boards. If the cable is attached incorrectly,
damage to the logic board will occur. Beater
motor operation will be disabled.
5.
Verify probe resistance.
6.
Use the self-test program.
Self-Test Program
The Generation II controls are programmed for a
self-test. The control can be used to help identify
problems in the power board, the logic board, and
the thermistor probes. The self-test program is not
intended to, and will not take the place of a
reasonable and prudent service technician.
The self-test program is divided into two sections.
The first section is performed automatically by the
logic board itself and the second section is
performed by the technician.
This test is designed to aid in identifying problems
within the logic board, the power board, or the
thermistor probes.
Self-Test - Part I
The self-test program is initiated by holding down
the MIX, WASH, AND PUMP keys on the logic
board while simultaneously turning on the power
switch. Hold down the keys until all eight lights
illuminate.
Note: If all eight lights do not illuminate, or if the
test cannot be initiated, the logic board is defective.
Figure 2
Each light corresponds with a particular relay. The
light on the panel will not extinguish until the test is
completed for that particular relay.
Logic Board Light
Corresponding Relay
MIX LOW
Mix Relay
MIX OUT
Fan Relay
MIX
Pump Relay
STANDBY
Beater Motor Relay
WASH
Compressor Relay
AUTO
Spinner Relay
PUMP
Portion Relay
When the self-test is initiated, all eight lights will
remain on for three seconds. At this time, the
processor will begin to check the power board relays
as follows:
Note: Each relay closes for three seconds during
this test. As the relay opens, the corresponding light
extinguishes. There is a ten second pause between
the activation of each relay.
1.
The SET POINT light turns off.
Ten seconds after the SET POINT light turns
off:
2.
The MIX relay closes and opens again. The
MIX LOW light extinguishes.
3.
The FAN relay closes and opens again. The
MIX OUT light extinguishes.