Chapter 11 Troubleshooting
210 BMTW-SVN01F-EN
• Incorrect UCM addresses
• Incompatible hardware or software versions of the UCM and/or of
Tracer Summit
• Wrong or defective UCM communication card at the BCU
• BCU site configuration not programmed correctly
Communication Failures that Occur After Initial
Installation
Failures that occur after successful communication following initial
installation can generally be traced to:
• Wiring problems, i.e., shorts or opens that develop from wire that is
damaged from either being pulled too tightly across sharp objects or
from building vibration
• Communication failures caused by nearby strong sources of
EMI/RFI interference that have been added since original wiring
installation
• UCM addresses reset incorrectly after UCMs have been serviced or
replaced
• AC-power disturbances (lightning, welding, etc.) that enter the UCM
communication link wiring and are strong enough to damage the
UCM communication card and/or connected UCMs
• Failures of a UCM communication card and/or BCU logic board
• Programming changes at the Tracer Summit PC Workstation that
alter the site configurations or UCM objects
BCU Panel Mismatch Error
The panel mismatch error is a result of active panel checking. Active
panel checking is a process by which the PC Workstation reads the type
of BCU that is connected for a given address. If the BCU hardware does
not match the BCU as defined in the Site Configuration editor, active
panel checking will discover the error. The Panel Mismatch error mes-
sage (Figure 94 on page 211) will explain the mismatch, and the Site Con-
figuration editor will be launched to allow you to resolve the error.
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