Well that at least gives people the shape of the unit to be looking for and it seems to be by an air vent.Here iis wiring for a e7000 honda shows where sensor is located just wondering if all hondas are located in the same spot part #22
Ref No
22
Part Number
35610-Z37-PA0
Description
SENSING UNIT (CO)
Serial Range
1000001 - 9999999
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I have a pack of security bits but I lent them out to a friend and now and have to get them back.I think once you pull it off of there, it will be easier to see the actual air inlet. Could be as simple as taping over it since the rest of the box looks pretty well sealed.
Side note: I learned a long time ago to always have a large set of security bits on hand.
My gut feeling is that this thing transmits data and may realize when the sensor data is not changing at all.
Tell you a little story.I doubt that. It may look for data transmitting (to prevent removal), but is there is no carbon monoxide, there is nothing to report. And adding "smarts" to actually analyze the data would probably not be cost effective.
The point of this long story is that if this little $86 device with built in Wifi can give fairly accurate CO measurements and transmit it over Wifi and voice it would not surprise me at all that a $170 CO module inside a generator can at least transmit the data back to the Inverter board and send a signal if it thinks the sensor is malfunctioning.
I would expect that there are always small changes in the CO concentrations coming into the sensor. Maybe bouncing small numbers between 1ppm and 10ppm. If it see's it staying at 0ppm for 10 minutes when the generator is running it might assume the sensor is bad and throw an error. Remember these things are designed to win Court cases, so they probably don't want an 8 year old sensor dying while the battery is still saying it's has life left in it or a defective sensor in a fairly new unit fooling the owner. Remember some people are really dumb. They will go through life assuming that the sensor will save them even when they do dumb things like put the generator in a closed garage. Once Honda puts that sensor in the generator they assume a liability that it will stop the generator if the Co levels are high.But how is clean air considered malfunctioning? Unless there is an air movement sensor in there, I can't see it being an issue. Bet if your wifi CO sensor was in a sealed bag, it would just continue to think everything is fine.
In any case, if the module is actually available for purchase, I think this whole bypass thing is less of an issue. I personally would still want to be able to bypass things if it was an emergency though, even if that means having a spare on hand. Usually the clock does not start on the sensor's EOL timer until you pull a tab or otherwise activate the battery.
Once Honda puts that sensor in the generator they assume a liability that it will stop the generator if the Co levels are high.
Maybe, we will see.I think you are over thinking this.
I think the guy on Facebook said that if you disconnected the whole harness that the generator will shutdown at some random time period like 8 hours or 20 hours. It makes sense to me as I assume that the control board must be monitoring the CO sensors battery level. I suspect the 10 year sensor life span is dictated by that battery voltage going low. It would make sense to match the battery capacity so that it expired just before the sensors life span was used up.Having thought about it a bit more and based upon all the evidence, I suspect that the wiring harness shown in the photo and the video is the one that connects to the CO sensor module. If you unplug it by pulling it loose from inside the control panel area (as shown in the Youtube video), you get the same effect as cutting the yellow wire, but it is more easily reversed than cutting the yellow wire (as shown in the FB post). Disconnecting the harness also removes the other wires from the sensor, but they probably just provide power to the CO Sensor and communications between the CO sensor and the button/LED module on the control panel.
It would be interesting to just unplug that harness and leave the button/LED module plugged in, and see what happens. I'm guessing that it'll show a sensor error LED, but that the generator will otherwise work. If that's the case, it also suggests that the generator will continue to work even after the CO sensor reaches EOL.
Most CO sensors used in residences have a ten year fuse built in. I suspect that the CO sensor has the same fuse, e.g., a 10-year life. If anybody tests these theories, please post the results here.
I think the guy on Facebook said that if you disconnected the whole harness that the generator will shutdown at some random time period like 8 hours or 20 hours. It makes sense to me as I assume that the control board must be monitoring the CO sensors battery level. I suspect the 10 year sensor life span is dictated by that battery voltage going low. It would make sense to match the battery capacity so that it expired just before the sensors life span was used up.