Brian H

If you have a Diode test in your meter. The diodes should have a conductance in one direction and a high reading in the other direction. So the 30V diode should read like any other diode. If you don't have a Diode setting. Depending on the ohmmeters voltage on the probes. You should get a fairly low resistance in one direction and a much higher resistance in the other direction. I don't understand your using a V reference. As resistance is in ohms. Unless you are reading the voltage across a diode while powered up. I called out the capacitor by its value. Would have been clearer if I had said 470Uf/35V

You may want to look in the UDI Wiki for some information. It has all kinds on information in it. https://wiki.universal-devices.com/index.php?title=Main_Page The Safe Mode indicates. You have no PLM (2412S or 2413S) found when the ISY99i is powering up. It could be possible you cant register the unit. As it was discontinued years ago. If you do get it going. 3.3.10 is the last firmware released for it. So the recently released Insteon Modules would not be supported. Like a Siren Module as an example. Found this in the UDI Wiki. https://wiki.universal-devices.com/index.php?title=ISY-99i/ISY-26_INSTEON:Quick_Start_Guide

You may want to open the Event Viewer in Level 3. Then you can see the messages being sent and received back from the module. You should be able to save the messages in a text form. To look at it or post it here. You may want to check you Firmware version and UI Version are the same. Help about. Latest ISY99i is 3.3.10. The 2475S is single band and the 2475SDB is Dual Band as you thought. Do you have any other Dual Band Modules, Access Points or the Range Extenders in your setup?

When you changed the PLM. Did you power down the ISY994i and old PLM. Change the PLM. Power up the PLM and ISY994i? Then use the Restore Modem (PLM) function. To go out and change the old PLMs six digit Insteon ID to the new PLMs ID? If you have a PRO version. You can turn off automatic updates to battery powered modules and then restore each on separately.

I would also say. Watch the PLM carefully. The 2413S PLM has a reputation of failing. After two years and a few months. If you have any 2443 Hardware revision 2.0 and above Access Points. They are also on the base 2413 PLM main board and can also fail. I had two myself. Some of the symptoms is Link Database is 0 or almost empty, works for a short time after a power cycle, Status LED is dimmer than you normally see. There is a real long thread here on how we rebuilt ours along with symptoms reported. https://forum.universal-devices.com/topic/13866-repair-of-2413s-plm-when-the-power-supply-fails/

When they changed to the 2 LED cover. I did see a Smarthome note to dealers. That you could buy older ones as a color change kit part. To match the older ones you may have in the home now. Now all the accessory plates and light pipes seem to be gone.

The condensate pump has a safety switch which can be wired in either NC or NO mode. Does it have anything connected to it now? As the I/OLinc's Sensor Input is made to use a dry contact connection with no voltage on it. As it supplies its own low current signal. I have seen reports of some variable speed controls. Generating power line noise. So you would have to see if it effects the I/OLinc and 2466S are effected by it running. Both are power line only Insteon modules.

Have you tried opening a trouble ticket with UDI. They have a good support system in place. You may want to mention this thread to them.

The power LED in mine is driven directly from the ISY units power supply and a current limiting resistor. There have been a few others posting here that their power LED was off. With no other symptoms being seen. You may want to see if anything in the troubleshooting section of the UDI wiki. I thought I saw a section on the log entries and will see if I can find them. The UDI Cookbook also in the wiki may have something in it. https://wiki.universal-devices.com/index.php?title=Main_Page#INSTEON_2 https://wiki.universal-devices.com/index.php?title=Main_Page

I have seen no posts indicating the new PLM requires 5.3.x. I have no information on what V2.6 has over the older ones. It could be possible it has revised transmitter and receiver circuits. Are your modules Dual Band or the earlier power line only ones? Coupling between the incoming power lines? If you have the 2443 Access Points for coupling and they are any V2.0 or above. They are built on the same base 2413 main board and suffer the same power line issues we see in the earlier versions of the 2313S PLM. I had a pair mess my system up until I rebuilt them. The V1.X 2443 where on a different chassis and where much better. You may want to run the built in communications tests in the Access Points, Range Extenders or Dual Band modules. To see what the tests may show. Anything new in the home or an existing device moved to a new location? Around the time the communications started to go down hill? Some electronics generate power line noise or are signal suckers. I bought a few of those new deformable garage lights. One model has a .2uF capacitor across the power input and it severely absorbs power line signals. The other model I was trying generates so much RF garbage it can kill things like a garage door openers Rf controller key fob.

The PLM has a reputation of failing. In tools, diagnostics, PLM Info/Status does it show connected and the PLM six digit ID Number? Does it get better for a short time if you power cycle the PLM and ISY994i? Is the LED on the side of the PLM On at about the normal brightness? When you tried the new PLM. You would have to do a restore PLM after a power cycle of the ISY994i and PLM or all the Insteon modules would have the old PLM 6 digit ID in them and not respond to the new PLM 6 digit ID. The system would be busy rewriting the new PLM 6 digit ID into every module. This is for Insteon. Z-Wave doesn't use the PLM 6 digit ID. The power supply also has been reported to fail. 5VDC to 30VDC. 1 amp probably best. The UDI store had a 12VDC 1 amp last time I looked. Do you have Z-Wave as the files you pointed out. Seem to be Z-Wave files but probably checked even if Z-Wave is not installed. If the power supply was flaky. It may have corrupted the SD Card. With file errors now happening. Event Viewer in Level 3 may show some of the communications failures and successes. The Log and Error Logs may also show some information.

If the fuse has continuity. Then it should be OK. D3 is the 30 volt Zener diode. One side would be on the 470uF + and the other side on the 470uF -. The + side of the 470uf would also have continuity to the AC Line pin. In your second photo. From the top edge. On the right side of the 470uF cap. MOV1,D1 (black body), D3 (glass body), D9 (glass body).

Are you looking at this module? https://www.universal-devices.com/product/smart-meter-module-sep-1-1/ You may find some information in the UDI wiki. https://wiki.universal-devices.com/index.php?title=Main_Page I have not seen a lot of information on the module. In the wiki but you may see something in the electrical area and the users guides. There are a few sections here where the ZS is referred to. https://forum.universal-devices.com/forum/28-green/ UDI has good customer support. You may also want to contact them to see what they say.

How did you determine the crystal was bad? Crystals are normally a reliable component. I know a few have thought the component mounting glue was something oozing out of the crystal.

One thing to be real careful with. The +35V side of the capacitor and the +5 Logic supply are tied directly to the Line input from the wall socket. I would also check the 30 Volt Zener diode. That is connected across the 470uF/35V capacitor. In the main 30 Volt DC supply. The earlier hardware version. Where noted for failing or getting warm enough to actually fall off the PCB or blacken the PCB. Your photo looks like the later revision board with a different 30V Zener that may have been an improvement over the older revisions. I replaced the 470uf/35V caps in many of the 2456S3 relay type modules. One started pulsing On and Off at about a 30 cycle rate. One had a shorted 30V Zener that made the module look dead. If they are completely dead. You may also want to check the fuse in the shrink tube. From the Line input pin to the PC Boards Line input connection. This is what is in a older PLM. I believe its frequency was used in many of the Insteon modules. Crystal 22.1184MHz, 18pF Load Y1 Through-hole Recommended: Citizen model CMR309T22.1184MABJTR

I did some looking. I did not find any exact information on a Gredia water flow sensor. I found similar model water flow sensors. Using an Arduno or similar type board. They had a Hall Magnetic Sensor and a rotating magnet. To sense the fluid flow. The Hall Sensor should trigger the Sensor Input of an I/OLinc. The Sensor LED should flash On and Off as the water flows.

VCC(+) to the 5 Volt output terminal of the I/OLinc. So the water flow sensor has to be able to run on +5 volts DC. GND to the GND terminal of the I/OLinc. Signal Output to the Sensor Input terminal of the I/OLinc. The I/OLInc sensor input is designed for a dry closure. That has no voltage on it. It has its own low voltage sensing signal on the S terminal. A 5 volt pulse would probably not do damage to the I/OLinc sensor input. It may still see the 5 volt DC to 0 volt pulses. You mentioned a pulse rate signal on the flow sensors output. The I/OLInc is not designed to be counting pulses. Depending on the pulses speed and duty cycle. It may loose some of the pulses changes or just sit there and miss everything. There is a time period between the sensor input changing and the Insteon power line commands are completed. If the pulses are not too fast. It may have time to send the On and Off commands. A test when connected may show any possible issues. A constant stream of Insteon Signals may cause other communications problems with your set up. The I/OLinc is an earlier designed power line only module, not Dual Band. May need a Dual Band device close enough in some situations.

The pin out on the 2413S PLM Quick Guide. Looks like it is using the signal names from the PC. As its reference. From the serial port schematic. Pin 1 is RS232 signal out to the equipment connected to it. Pin 7 is common ground. Pin 8 is RS232 signal in from the equipment connected to it.

The 2448A7 is strictly Insteon RF. So it has to go through another Dual Band device to process the Insteon RF to and from the power lines. Not important to most users but it also does not do any X10 signaling. The PLM uses RS232 for communicating to the outside world. MAX232 or MAX232EI interface chip. So the signals are RS232 swinging + and -. The ISY994i would have to have a matching signal pin out and signals as the PLM. The pin outs and RS232 signal specifications are in the PLM Quick Start Manual. If you don't have one. https://cache-m2.smarthome.com/manuals/2413Sqs.pdf Though most have not found them and tossed the box. There is a RJ45 to standard DB9S serial port cable in the 2413S or 2412S PLM box from the factory. It is only 3 wires being used. Serial In, Serial Out and Ground. Pin 2 was a unregulated 12VDC from the older 2412S as the ISY994i technically could use its power to run. I can ring one out if you need the pin connections. I looked at the output of my spare ISY994i and did not see any signals on its pins for the PLM TTL signals and one seemed to have a termination resistor on it. So I doubt the TTL signals would be used. My thoughts are the 2413S is not abandoned but in very short supply. Due to the pandemic and it is the more popular of the two interfaces. USB or Serial Port. Here is the 2448A7 Quick Start Manual if you want some information on it. http://cache.insteon.com/documentation/2448A7qsg.pdf

Did you ever try a replacement power supply? We have seen reports of strange things happening. I had failures on an ISY99i and my present ISY994i. If you are using a 2413S PLM they also have a reputation of failing and strange things happening

Thank you for the update on Steve Lee. He had assisted me a few times and I valued his information. I will miss his assistance and knowledge.

Status 'Fireplace-Sensor' is On . Would only be On as long as you held the button in. Then go Status 'Fireplace-Sensor' is Off. When you released the button.

I would also say. Test the power supply first. It may even have a voltage output on a meter and may quickly die under a normal load. I have had an ISY994i and router with similar symptoms. That a replacement supply corrected.

This is a real long thread on the 2413S PLM and its failures. https://forum.universal-devices.com/topic/13866-repair-of-2413s-plm-when-the-power-supply-fails/ If you look at the label on the back. It should have a Hardware Revision number and a Date Code. I know hardware revisions higher than 2.5 have improved capacitors and a updated serial port. With more protection on the serial signals. I suspect they should be more releasable.

That does sound like a typical Smarthome thing. Sounds like things have not changed much, from when I was a member of the original Developers Group. Had to buy the privilege of membership. Along with an NDA for the documentation and a small set of modules to develop with. This was in the PLC not PLM days. Where you could assemble some code, with SALadIDE and DSM308. Download it into the PLC and it could run disconnected from the computer. Only plus was Insteon was in its infancy and we actually got to interact with Insteon Engineers. That one day just disappeared and all the documentation [though flawed] went public domain for awhile before just disappearing again.