Elkhart Brass Scorpion 8394-04 - Manual (Page 22)

19
LED Label Color Signal Significance
+12V Power Yellow
When lit, 12VDC power is available for operation of unit. If this LED
dims upon activation of a monitor function switch, the power source
has a significant voltage drop due either to low battery charge or
excessive line resistance.
CPU Idle Green
This LED is located on the small daughter board. When power is
applied to the circuit board, and the “+12V Power” LED is lit, this
LED should also be lit. When lit, 5V power for the logic circuitry is
available. If not lit, replace circuit board.
Overload Red
This LED is located on the small daughter board. This LED is
normally off. When lit, it signifies that one of the current sensors has
sensed an overload condition and has shut off power to the
corresponding motor. The LED should turn off when the function
switch is released. This device will normally light whenever a
monitor function reaches a travel limit. A low voltage condition at the
power source may also cause this LED to light as a result of increased
motor current at lowered voltage.
Primary
Power
Green
This LED is located on the small daughter board. When power is
applied to the circuit board, and the “+12V Power” LED is lit, this
LED should also be lit. It indicates that power is available to the
primary control switches. If not lit, replace circuit board.
Stow Green
If the P20 jumper is set to do so this LED will blink during the stow
sequence. In either case, the LED will come on continuously once the
unit is stowed. It will remain on until the operator gives a positional
command. The controller will remember the state of the “STOW”
LED even if power is cycled.
Secondary
Power
Green
When power is applied to circuit board, and the “+12V Power” LED
is lit, this LED should also be lit. It indicates that power is available
to the secondary control switches. If not lit, replace circuit board.
Inputs (6) Red
These LED’s are located on the small daughter circuit board. Each of
these LED’s is normally off. When a function switch is actuated the
corresponding LED lights signifying that the input signal has reached
the circuit board. If an LED fails to light, an open circuit situation
probably exists in the wiring between the relay box and the switch, or
the switch is defective.
Outputs (6) Green
Each of these LED’s is normally off. When a function switch is
actuated, the corresponding LED lights up, signifying that the
appropriate relay has actuated. If an output LED fails to light when
the corresponding input LED is lit and the overload LED is not lit,
replace circuit board.
Table 5 -- LED Descriptions