I need some help with debugging X10 control functions of a 2001-era Omni LT system. (This is somewhat a continuation of a request I made here some time ago. I could download the config files from the Omni LT controller board using Dealer version of PC Access as suggested by pete_c and ComponY).
Even though I could monitor and set temperature of the 2 Omnistats using PC Access and the 3 Omni Automation wall consoles, I could never control any of the ToggleLinc PLC dimmer switches (model 23894I) in the house from PC Access or wall consoles. Since we purchased the house a few months ago, I had to replace 6 ToggleLinc switches (thanks to the spares left by the previous owner of the house). All of the switches failed in the same way -- they suddenly start flashing like a strobe light and the only way to make then stop is by cutting-off power to the switch by pulling the small Status LED/Set Button out. The previous owner says that he replaced only 2 or 3 switches since the house was built 17 years ago.
To fix the problems, I first reset all the ToggleLinc switches in the house to factory reset state, and then tried to set primary address to them following the instructions in the switch's manual (and as BLH correctly pointed out in here). Even though the switches went into the "programming mode" as indicated by the blinking Status LED/Set Button, I could never assign an address to them. I suspect this is because the Omni LT controller couldn't send out the X10 codes even though I tried several times from PC Access and wall consoles.
I am now suspecting that the 2-way powerline interface (X-10 Powerhouse model TW523) connected to the Omni LT controller is dead. How do I verify that TW523 is functioning correctly? (I wish I have an oscilloscope at home... ). According to this technote about TW523, one should see the red LED blinking whenever an X-10 code is sent/received. But I always see a steady red LED even when I send out "all units ON" or "all units OFF" from PC Access -- is this normal?
Another possibility is that the X-10 control functions of the Omni LT controller is dead or stuck in some odd state. Is there any way to reset the Omni LT controller board which has a backup battery (and is it advisable to reset it)? (I hope HAI/Leviton guys are smart enough to add some watchdog timer based reset functionality in the embedded software on board...).
BTW, the PC Access says that the Omni LT board has a new firmware available. How do I update the firmware on an Omni LT board?
The previous owner of the house says both the X-10 system and the security system was working until the house was sold to us. We didn't do any major electrical work other than installing a couple of bath exhaust fans and motion sensor wifi cameras.
So sorry to write a such a long post. I am completely stuck here. Any help/advice is much appreciated. I am also thinking of upgrading the controller board to Omni LTe (or something ever better) before I run out of the remaining spare ToggleLinc switches.