Orion System E-BUS Distribution - Manual (Page 10)

E-BUS Distribution Module
Technical Guide 10
LED Diagnostics
“POWER” LED: When the E-BUS Distribution Module is powered
up, the POWER LED should light up and stay on continuously. If it
does not light up, check to be sure that the power wiring is connected
to the module and that the connections are tight. If after making all
these checks, the POWER LED does not light up, the module is most
likely defective.
“HB” LED: When the E-BUS Distribution Module is powered up and
running, this LED should blink rapidly like a heartbeat. If it fails to do
so, the module is either not powered up or is dead.
“SIO” LED: After the E-BUS Distribution Module receives a valid
request for information, it will send it out on the E-BUS side. At this
time, this LED will blink. If this LED is not blinking, check the con-
nections on the E-BUS side.
Other Checks
NOTE: The E-BUS Distribution Module contains no user-
serviceable parts. Contact qualifi ed technical personnel
if your module is not operating correctly.
Troubleshooting
“I2C” LED: If this LED is not blinking from time to time when
the E-BUS Distribution Module is connected to one of the VCM-X
Controllers, the VCM-X Expansion Module, the SA Controller, the SA
Expansion Module, or the 12-Relay Expansion Module, check the I
2 C
cable connections.