Brian H

There is lots of information, tutorials and videos in the UDI wiki. Including the ISY Cookbook. https://wiki.universal-devices.com/index.php?title=Main_Page

The I/OLinc modules. Have the same switching power supply chip as the 2413 line of PLMs. So I would think they may also have power supply issues and acting strange if the supply is getting flaky. In my 2450 modules. Smarthome tried a few different capacitors in the supply to try and improve reliability. Not a Pi style filter just a single C7. My V1.0 units where 10uF/25V close to the supplies output voltage. A 10uF/50V in a V1.8. Latest I have is a 220uF/50V in a V2.3

If you did not Factory Reset the module first. We have seen some modules having test addresses in them from the factory. So if you used add existing links. I would also think it maybe a link for a module not in your setup.

On my later purchased ISY994i. One of the case mounting screws is under the ISY994i label with is Bar Coded part number. The earlier one I have there was no label over one of the case mounting screws. So it is very possible. You have a label covering one of the case mounting screws.

Do you have a Z-Wave enabled ISY904i? The modules in the older post are Z-Wave devices. You could use a ELK9200 heavy duty 220 Volts contactor in its enclosure. https://www.elkproducts.com/product-catalog/elk-9200-heavy-duty-relay-contactor Controlled by a 120Volt Insteon plug in module or a switch. Or a contactor controlled by an Insteon Module.

No it will not work. It is a USB adapter. You need a 2413S serial PLM. To connect to the ISY994i's serial port jack.

When I just looked. The Z-Wave Plus board is showing in the UDI Store and not marked Back Ordered. If you find another dealer with it. Make sure it is not an earlier older version board.

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