Allen-Bradley Guardmaster, User Manual

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Rockwell Automation Publication 440R-UM013E-EN-P - March 2017 63
Troubleshooting Chapter 11
View the PWR/Fault Status
Indicator (Step 1)
The first troubleshooting step is to examine the PWR/Fault status indicator on
the front of your GSR module. See Figure 57 for status indicator location.
Figure 57 - PWR/Fault Status Indicator
The PWR/Fault status indicator has five possible states:
TIP The PWR/Fault status indicator is located in the same position on all
GSR modules.
Status Description Action
Off No power to the relay. Apply power.
Solid green The relay is in the run state. None.
Solid red The relay is in a non-recoverable
faulted state.
See Table 10 on page 63 .
Flashing red A non-recoverable faulted state See Table 11 on page 64 .
Green and flashing red A recoverable faulted state. See Table 12 on page 65 .
IMPORTANT
For accurate diagnostics, always start counting the flashing after the first
pause. The first cycle can be inaccurate.
PWR/Fault status indicator
Table 10 - PWR/Fault Status Indicator Is Solid Red
Indicator Description Model Possible Causes Corrective Action
Solid red
Faults that are not
described in Table 11
and Table 12 result in a
solid red indicator.
All
• A momentary power interruption.
• Noise on the power or signal wires.
• Cycle power to clear the fault and return the GSR safety
relay to an operational state.
• Reconfigure the safety relay (see Configuration on page 35 ).
• See additional information in Verify Grounding at the Power
Supply on page 66 .
CI, DI, DIS, and SI
Short circuit has occurred, or is present, from
+24V DC (A1) to S11 or S21 or from 24V Common
(A2) to S11 or S21.
DIS
Short circuit has occurred, or is present, from
+24V DC (A1) to 14 or 24.
SI
Excessive capacitance from input wiring to
ground, but not enough to cause flashing red four
times.