Hello I am experiencing an issue across multiple sites and vendors with the Carel pCO product in the past year. Previous to that I had not had a problem with these controllers.
The first issue I ran into was when two different Bacnet/IP ductless split units that I had integrated to stopped talking after several weeks of operation. We found that the only way to get them to work was to cycle power to the units. The vendor seemed clueless as to why this was the case and blamed me for not writing to his "keep alive" point which I was. There has still not been any resolution to this and only the building owners not paying attention to this has kept it from blowing up.
Then a couple of months ago the same vendor came out and installed a new cooling unit in a server room and we had a similar issue, this time the vendor blamed me for using the incorrect points, he had provided the wrong points list originally. I corrected which of the 1000 or so un-named points I was mapped to. I just checked in on this unit and it is offline again.
The reason why I checked in on it is that I was on a site yesterday trying to figure out why my entire MSTP network had failed, talking to pumps, chillers and boilers. Turns out the chiller had one of these Carel controllers and unplugging it got the network going. Then I cycled power to the chiller and plugged it back in and the MSTP network and chiller started talking again. This network had been running just fine for the past few months though I don't know how long the chiller had gone between the vendor turning it off and back on during start up as the building is just getting finished and the owner is moving in.
Does anyone else have any experience with this happening? Is this a new firmware issue that may have been fixed? Is there some kind of weird communications parameter that needs to be set in these units?
Thanks,
The first issue I ran into was when two different Bacnet/IP ductless split units that I had integrated to stopped talking after several weeks of operation. We found that the only way to get them to work was to cycle power to the units. The vendor seemed clueless as to why this was the case and blamed me for not writing to his "keep alive" point which I was. There has still not been any resolution to this and only the building owners not paying attention to this has kept it from blowing up.
Then a couple of months ago the same vendor came out and installed a new cooling unit in a server room and we had a similar issue, this time the vendor blamed me for using the incorrect points, he had provided the wrong points list originally. I corrected which of the 1000 or so un-named points I was mapped to. I just checked in on this unit and it is offline again.
The reason why I checked in on it is that I was on a site yesterday trying to figure out why my entire MSTP network had failed, talking to pumps, chillers and boilers. Turns out the chiller had one of these Carel controllers and unplugging it got the network going. Then I cycled power to the chiller and plugged it back in and the MSTP network and chiller started talking again. This network had been running just fine for the past few months though I don't know how long the chiller had gone between the vendor turning it off and back on during start up as the building is just getting finished and the owner is moving in.
Does anyone else have any experience with this happening? Is this a new firmware issue that may have been fixed? Is there some kind of weird communications parameter that needs to be set in these units?
Thanks,
