Comfort Automation/ Security System Forums

Hello there,

Right now i have an urgent Trouble.
Every UCM or RIO that Connected to my SEM, wont work, it\'s seems that it\'s don\'t get the power from JP12/JP12A.

so with the PIR/Smoke detector that connected to the SEM.
it won\'t work.

But i checked, the Green LED at the LEM is On.
so i couldn\'t figure out the problems.

anyone could help me out?

Try connecting to the 12V terminals on the SEM instead of the 4 way connector

When connected to 12V of the Slave if there is no power measure the voltage at the 12V terminals before connection and after connection of the UCMs and RIO

The wires to the UCM and RIO may be shorted or something on the UCM or RIO may be shorting

Remove the RIO and UCM one by one and see if the voltage recovers

[user=86]ident[/user] wrote:

Quote:Try connecting to the 12V terminals on the SEM instead of the 4 way connector

When connected to 12V of the Slave if there is no power measure the voltage at the 12V terminals before connection and after connection of the UCMs and RIO

The wires to the UCM and RIO may be shorted or something on the UCM or RIO may be shorting

Remove the RIO and UCM one by one and see if the voltage recovers

Thank you for your Help, it\'s now working, after i check out one by one the wires, and find out there is one of them was shorted.

thank you