Class1 Throttle Interface CAT 105216 - Manual (Page 6)

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DOC 105216_e:\manuals\throttles\cat\New_CAT_Throt.p65-04252000
Indicators
PWR
INP
OUT
6 5 4 3 2 1
7 8 9 10 11 12
On Unit Troubleshooting:
Is the PWR LED (Red) illuminated?
It requires 12 VDC at terminal #1 and Ground at terminal #12 to oper-
ate.
Is the INP LED (Yellow) Flashing?
The flash rate should increase as the vernier is turned out.
If the flash rate changes with the vernier position, then the interface is
correctly reading the input.
Does the intensity of the OUT LED (Green) increase as the vernier is turned
out?
The intensity is based on the PWM duty cycle. If the LED changes
from dim at closed throttle to full bright at fully open throttle, then
the interface output is correct.
Does the INP LED stay on for 2 seconds and then off for 2 seconds repeat-
edly?
This indicates you are in Fast Idle Mode and the Throttle Input is ig-
nored.
Does the INP LED flash twice rapidly and then pause for 1 second and
repeat?
This indicates too high a signal input voltage.
Unplug the vernier and check to see if the INP LED returns to a slow
flash rate.
A missing gound to the vernier or a short to the signal wire can cause
this.