1107200 Shadow VI User Manual
page 80 Chapter 4 Troubleshooting Shadow VI
• Checking and Cleaning Lens Window(s), page 87
• Checking Alignment, page 87
• Checking and Replacing Fuses, page 88
• Checking and Replacing Control Relays, page 89
• Checking and Correcting Cross Talk, page 91
For many of the procedures provided, you can correct the problem yourself. However, if you
find serious problems, the defective component (optic head or control circuit board) must be
factory-repaired. However, once you know which unit is bad, you may be able to substitute
another unit for the faulty one until the repairs are made.
Description of Shadow VI Indicators
Shadow includes several indicators. Figure 1-1 in Chapter 1 shows the indicators on the
transmitter and receiver, and Figure 1-2 illustrates the control.
These indicators communicate Shadow's operating status. Use them to troubleshoot your
light curtain (refer to the Troubleshooting guides that follow). If a contradiction exists
between the indicator lights at the receiver and those at the control, make sure you compare
your findings with the information in these troubleshooting guides to solve the problem
immediately.
At the Optic Heads
The transmitter has an amber-colored power indicator which remains illuminated when
Shadow has power. There are three indicators on the front of the receiver. The red
indicator means that the light curtain has been interrupted. The orange indicator flashes
when the floating window option is turned "on" at the control (see Chapter 2). The green
indicator means the light curtain is unobstructed.
At the Control
Four indicators appear on the front cover of the control and are clearly labeled. The green
"curtain clear" indicator means that the light curtain is unobstructed and the machinery will
be allowed to operate (the control relay contacts are held closed or in the unobstructed/
energized state). The "floating window" indicator lights up amber when this blanking
feature is enabled inside the control (see Chapter 2). The "stop signal" indicator goes red
when the light curtain is obstructed, the control relay contacts are open (or in the de-
energized state) and the press is disabled, or when Shadow has detected an internal
malfunction. The yellow "reset required" indicator signifies that a reset-required condition
exists. This could occur during power-up, when certain settings are enabled at the control
(see Chapter 2), or if Shadow detects an internal malfunction with the components
(transmitter, receiver, or control).
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