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The system trouble indicators consist of a bank of five yellow LEDS (refer back to Figure 1 for their
location on the TPS). These LEDs are used to signal various trouble conditions on the TPS and its
SLCs. Only one trouble at a time is shown. You can step through all of the troubles present on the
TPS or its SLCs using the Trouble Scroll Pushbutton. This pushbutton is shown in Figure 1 and is
located just to the right of LEDs A through E.
Notes:
Any trouble indication that applies to a specific SLC channel has the corresponding
LED (CH1 through CH3) for that channel lit.
The Trouble Scroll Pushbutton allows an operator to scroll through multiple troubles.
A
B
C
SYSTEM CODES
SLC CHANNEL CODES
D
E
Troubleshooting
System Trouble
Indicators
(LEDs A through E)
= On LED
= Off LED
Short Circuit
Missing Device
Extra Device
Class A Trouble
Earth Trouble
Isolator Trouble
Bad Download
SLC Overcurrent
Address Out of Range
Channel Fail
Duplicate Device
AC Fail
Running on Depleted Battery
Memory Checksum Error
Hardware Configuration Mismatch
Channel Controller Trouble
Positive Earth
Memory Test Error
Field Power Overcurrent
Battery Cutout
Low/Missing Battery
RUI Comm Fail
Negative Earth
Hardware Configuration Error
Charger Trouble
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