August 2013 5-18 P/N 06-236530-001
IIM RS485 Channel 2 Failure On The IIM's RS-485 wiring is
programmed for two channels and
there is a fault in Channel 2
(Terminals TB1-7 and TB1-8).
•Look for discontinuity in IIM wiring
(Terminals TB1-7 and TB1-8).
•Troubleshoot IIM wiring (Terminals
TB1-7 and TB1-8) by breaking-up
circuit to isolate short circuit to
specific branch or leg.
•Disable this wiring style via
LaserNET if not used.
•Refer to ORION-XT Installation,
Operation, and Maintenance Manual,
P/N 89.200.
IIM Style6 Network Failure On An open or short circuit in the
RS-485 field wiring from the IIM to
the HSSDs. Class-A wiring only
•Look for discontinuity in IIM wiring.
•Troubleshoot IIM wiring by
breaking-up circuit to isolate short
circuit to specific branch or leg.
•Disable this wiring style via
LaserNET if not used.
•Refer to ORION-XT Installation,
Operation, and Maintenance Manual,
P/N 89.200.
IIM HSD Supervision Failure On The IIM has lost communications
with one or more HSSDs.
Communications problems prevent
the HSSD from being identified by
specific address.
•Check the IIM-to-HSSD wiring
connections
•Ensure that no HSSD has been
removed
•Use the procedure in
Paragraph 3-2.5.2.4.15 to de-
register an address if no HSSD
should occupy that address.
•Check IIM wiring for excessive
capacitance and/or resistance.
•Use LaserNET to troubleshoot all
HSSDs.
•Refer to ORION-XT Installation,
Operation, and Maintenance Manual,
P/N 89.200.
IIM Auxiliary Trouble Present On The IIM is programmed as a
standalone unit and a trouble signal
has been reported via its auxiliary-
trouble initiating circuit. This is not
an IIM fault. It is a fault associated
with the equipment being monitored
by the IIM.
•Investigate and correct the problem
associated with the equipment being
monitored via the IIM's auxiliary-
trouble initiating circuit.
•Disable this feature via LaserNET if
not used.
Table 5-4. IIM Events (Continued)
IIM Events
Error Message Probable Cause Corrective Action
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