Brian H

You may want to start by get some information in the UDI WIKI. https://wiki.universal-devices.com/index.php?title=Main_Page There are some very good manuals, tutorials, setup videos and the ISY Cookbook there.

Use the R and W terminals of the AUBE and connect to the NO and Common relay output terminals. If you used NC and Common then the heat would normally be on and off when you turned On the relay in the IO/Linc The C terminal on the AUBE is not used in this case. It could provide power to a thermostat that used the 24VAC common for power.

Oh I missed that. Thanks for pointing out the box to try and click on.

Yes try and open it.

In the My Account. The screen you posted earlier. On the registered ISY product line. Try clicking on the Action Area. Modules tab. The purchase modules choice in the Help tab. No longer shows you options to add or delete modules. It just takes you to your account information.

So when you clicked on the Modules Tab. The Z-Wave option was not listed?

Are the Insteon modules On-Off relay or Insteon Dimmer modules. Are the LED bulbs dimmable if you are using Insteon Dimmer modules? I have seen posts in the Smarthome and Insteon.com Forums on LED bulbs flickering on power line traffic. One person found using a 2477D dimmer switch on the LED bulb worked better than a dimmer type KPL. Some say different brands of LED bulbs work better than others.

Thank you for the UPDATE. It may help others with similar issues. Good to read you are back in business.

Tools, Diagnostics, System Status also has some memory information in it.

Help Tab. About choice. Will give you the firmware, UI, model of ISY994i, memory information and any Optional modules installed. If you have the PRO version it will be shown as a PRO. Also if you have a Disable Automatic writes and Disable Automatic writes to Battery Operated devices features. That is only in the PRO version. The non PRO models limit the number of programs and scenes it can use. If you hit the limits. You can't add more programs and scenes. I can't find the limits in my notes. You can purchase the PRO optional module if needed. It is pure software change. You purchase it and UDI enables it remotely. You may want to see what others can contribute to your problem.

Do you have a PRO version of the ISY994i? What revision firmware and does the UI match that version?

If the UPS and computing gear is on a FilterLinc. They probably are not effecting things. Only other thing I can think of. An electronic device is starting to make electrical noise. Disconnecting things ad testing may show something.

If you measured the power supply and there was no load on it. Like the ISY994i or test load resistor. You will get a false reading. The power supply probably can no longer supply any current if loaded. The dim and flickering power LED is also another indication the power supply is bad and can't supply the proper voltage and current needed to run the ISY994i. I would test the ISY994i with a new power supply before doing anything more. The ISY994i can take a wide voltage range input. 5VDC to 30VDC .500mA or higher current rating, + voltage on center pin. You can try another supply until your new one arrives or wait. The last time I looked. UDI was selling a 12VDC 1Amp replacement on their web store. When you power up the ISY994i with the new supply. Power up the PLM so it is totally booted up. Then power up the ISY994i. So the PLM is found when the ISY994i boots up and you don't get a safe mode start up.

That sounds like a very good choice. It is made for controlling 240VAC heating units and has 24VAC control built in.

ELK makes an ELK9200 240VAC control in an electrical box. Has a 120VAC power cord on it and you can control it with a On/Off module. A 120VAC contractor and Insteon relay type switch or plug in module as pointed out. Could be another good way to go.

V2.5 has the improved series capacitors and new serial port daughter board. By chance. Is the PLM on the same branch circuit. As some computing equipment or AC input side of an UPS?

This also applies to the presently sold ISY994i https://wiki.universal-devices.com/index.php?title=ISY-99i/ISY-26_INSTEON:Red_Exclamation_Mark

As pointed out. The WIKI has all kinds of information in it. https://wiki.universal-devices.com/index.php?title=Main_Page

If your last PLM was a Version 2.5 (The latest reported) or 2.4. They have new capacitors rated to be in a switching power supply and new Daughter Board with ESD protection for the I/O signals and serial chip. V2.3 the new capacitors and older daughter board. It sounds like you could have some noise or signal sucking on the power lines at times. Anything new electronically in the house or maybe moved an existing device to a new location?

I too would recommend all your Insteon linking and scene setup be done through the ISY994i interface with its 2413S PLM. If you want some information on how Insteon works. The Insteon White paper is still available. http://www.insteon.it/documentation/insteon_details.pdf Developers Guide. http://cache.insteon.com/developer/developer-guide-022009-en.pdf PLM. http://cache.insteon.com/pdf/INSTEON_Modem_Developer's_Guide_20071012a.pdf Some of the information in the files maybe dated. Like X10 support. Many of the latest revision modules removed X10 support. The X10 two wire dimmers stole power through the load. Except for the Insteon two wire dimmer for incandescent bulbs only. The wall switches need a Neutral power connection. So you may want to see if you have a Neutral in the locations where you want an Insteon Switch.

If you want to use the Motion Sensor II or Siren Modules to name two. Not supported in the 4.x firmware.

No it is made to go between the two incoming power lines. Usually around 220VAC. To couple the power line signal from one line to the other line. It does not pass the AC voltage between the two lines or from one of its leads to the other lead. It is a passive device and the ISY994i will not see it.

Diode is also on the ELK 912. I had thought they where going to try a plain 12VDC relay not an assembled board with protection.

If you go for a 12 volt relay it would be wise. To have a reverse polarity diode across the relays coil. To suppress the voltage spike when the relay is turned off. The ELK-912 has the diode on it as part of the assembly.

The LED may have a resistor in series with it to limit the current through the LED to a safe level. How it is connected and where you try a relay may be determined by which side of the resistor you use or if it will not effect how bright the LED flashes. I would also not use a relay that had too high a coil current needed to operate it. Maybe a small electronic assembly. That drives a relay and triggered by a application of a voltage to its control input.