ADS Environmental Services ADS TRITON+ QR 775027 A3 - Manual (Page 378)

Maintenance and Troubleshooting 10-57
External Power, I/O, and Modbus Subsystems
The following tables contain general troubleshooting techniques for
the external power, I/O, and Modbus subsystems corresponding to
externally-powered TRITON+ monitors, external input/output units
(XIOs), and external Modbus interface units (XBUSs).
Problem Monitor is not receiving power from the external source.
Possible
Causes
Breaker may have tripped.
Station power may be off.
Wiring may not be properly connected.
Power supply may be faulty.
ExPAC may be faulty.
Communication cable running between the ExPAC,
XBUS, or XIO is disconnected or defective.
Possible
Solutions
Reset breaker.
Have owner/operator restore main power source to
station, as applicable.
Verify that the wiring is properly connected inside the
XIO/XBUS or to the ExPAC and power supply.
Verify that “On” LED on the front of the power supply in
the XIO/XBUS is illuminated. If it is not, but AC power is
live, replace the power supply/XBUS/XIO.
Verify that the DC OUT LED (to the right of the DC OUT
terminal connector) on the ExPAC is illuminated. If it is
not, but the DC INPUT LED (to the right of the DC
INPUT terminal connector) is illuminated, test the power
at the DC OUT (P4 pins 1 & 2). If power is not
available, replace the ExPAC/XBUS/XIO.
Inspect the communication cable for proper connection
at the monitor and the ExPAC/XBUS/XIO.
Replace communication cable between monitor and
ExPAC/XBUS/XIO.
Contact your regional ADS representative.