Product specifications
CEX-Bus Interconnection Unit - BC810 Section 5 Maintenance
206 3BSE036351-510 A
CEX-Bus Interconnection Unit - BC810
Table 28. BC810 – Fault-Finding Procedure
Fault Possible Cause and Corrective Action
Fault LED is ON No 3.3 V caused by internal short circuit or
overvoltage from power supply
• Check external 24 V voltage with voltmeter.
• Send unit for repair.
Run LED is OFF Hardware error.
• Send unit for repair.
Internal fuse blown (BC810)
External fuse blown (TP857)
EPOK LED is OFF when
external power is connected
Hardware error.
External fuse blown (TP857)
• Send unit for repair.
C1 or C2 LED OFF despite
accessing CEX-units
CEX-Bus units using no interrupt (for example
CI851), no action is needed.