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Thread: Multitude of EvoHome Issues on new install

  1. #11
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    I have played around with the Evohome kit today, mainly focusing on the hot water as that is something we can't live without.

    The installer was out on Thursday morning and did "something" which connected the sensor and the controller back together. This then failed late on Thursday PM, however, the signal connected itself Friday morning. The signal then disappeared around 10pm Friday night.
    I looked through the installation pack today and decided to remove the bind between the Boiler, and the Hot Water to the controller. Then did the bind again for both. This fixed the issue, and we had hot water and heating. This worked until 3:25pm today, when the hot water signal fault appeared. I waited an hour or so, but it did not come back. I then pressed the button on the CS92 and the signal came back. Unfortunately, I wasn't aware of the failure report page and disconnected the controller, so I cannot check back for a pattern, but now that I know this page exists I can monitor.
    I have read online that the CS92 also needs to be 300mm away from the BDR91 (which it is), but its not 300mm away from the boiler and the hot water tank (both metal).
    I will assume that this is the reason for the hot water failure for now, and hope that when I get the devices moved, that my hot water problems will go away.


    In regards to the heating, the radiators which wouldn't get up to temperature have been bled, and the System Status is showing as 100%. It was previously assumed that these radiators were too small for the room based on the size, lack of insulation and the size of the windows.
    When the installer is back round to move the signal devices, I will ask him to change the stroke to 1 and monitor the top temperature achieved. If it stays at what it was, then I will need new radiators.

    Thanks for the guidance.

  2. #12
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    Quote Originally Posted by uhhu View Post
    I have played around with the Evohome kit today, mainly focusing on the hot water as that is something we can't live without.

    The installer was out on Thursday morning and did "something" which connected the sensor and the controller back together. This then failed late on Thursday PM, however, the signal connected itself Friday morning. The signal then disappeared around 10pm Friday night.
    I looked through the installation pack today and decided to remove the bind between the Boiler, and the Hot Water to the controller. Then did the bind again for both. This fixed the issue, and we had hot water and heating. This worked until 3:25pm today, when the hot water signal fault appeared. I waited an hour or so, but it did not come back. I then pressed the button on the CS92 and the signal came back. Unfortunately, I wasn't aware of the failure report page and disconnected the controller, so I cannot check back for a pattern, but now that I know this page exists I can monitor.
    I have read online that the CS92 also needs to be 300mm away from the BDR91 (which it is), but its not 300mm away from the boiler and the hot water tank (both metal).
    I will assume that this is the reason for the hot water failure for now, and hope that when I get the devices moved, that my hot water problems will go away.


    In regards to the heating, the radiators which wouldn't get up to temperature have been bled, and the System Status is showing as 100%. It was previously assumed that these radiators were too small for the room based on the size, lack of insulation and the size of the windows.
    When the installer is back round to move the signal devices, I will ask him to change the stroke to 1 and monitor the top temperature achieved. If it stays at what it was, then I will need new radiators.

    Thanks for the guidance.
    I usually find the most common issue with the CS92 is either the batteries low, or the contacts have come loose in the compartment or on the circuit board. There is a thread on it somewhere on here. But might be worth changing the batteries for some brand new ones, you never know how long the box has been sat on a shelf somewhere! If they dip below 1.5vs they usually cause issues.

  3. #13
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    I've come down this morning to see the the hot water sensor fault is still active, and it hasn't sorted itself out.

    I have followed the method as I did yesterday to get it working, which is now not working today. I have tried taking the batteries out, changing to new batteries and this is not working. I am at the pint of trying to bind the CS92 to the controller, but the controller is not seeing the signal.
    I see the correct blinking lights on the CS92, green with flashing red, after 5 secs, I then push again once, still green and flashing red, yet nothing on the controller.

    I have now taken the CS92 off of the wall and more than 300mm away from metal and other devices, in my hand, and still nothing on the controller.

    I have taken the wires out the unit on the backplate and put them in again to make sure they are tight - still nothing.

    It shouldn't be this difficult/problematic.

  4. #14
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    I've not read the whole thread, so forgive me if this has already been covered, but have you considered the possibility that the CS92 is faulty? Have you contacted Honeywell support, or your installer?

  5. #15
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    Quote Originally Posted by dty View Post
    I've not read the whole thread, so forgive me if this has already been covered, but have you considered the possibility that the CS92 is faulty? Have you contacted Honeywell support, or your installer?
    I've contacted the installer who has spoken to Honeywell.

    They first told him that I am experiencing issues because not every radiator has the Evohome TRV, and that the first thing to do would be replace all the TRVs with the Evohome ones.
    The second person he spoke to said that even though the RF signal might say it's excellent on the controller, it might not be, and so the BDR91 should be moved around. The second person also said that the On and Off frequency for hot water is different and so it would need to be excellent for both - albeit there is no way to check until it is in position.
    Based on the above, I am not convinced that speaking to Honeywell myself will provide any real benefit.

    Honeywell have not said that it could be faulty, and so I have not explored that option.

    I managed to get it up and running again through randomly pressing the button on the CS92 out of frustration and it was all working fine, for a few mins, then it failed. I decided to screw it back into the wall and forget about it. The signal then came back and was back for around 3 hours, when I then remotely put the hot water on for me coming in from a run. When I arrived home, the signal was lost and little hot water.
    I have removed the batteries and reinserted them (as seen on another thread), and the signal is back.

    I can see on the other thread people have been bending and re-tensioning the battery fitments, but I really don't want to have to go through all that hassle for a product which is brand new and should work out of the box.

    With the exception of the heating not getting to the desired temperature in some rooms (which I can live with for now), it works well and I am enjoying the convenience. However, even if it failed, I have secondary heating options.
    I do not have secondary hot water options currently, and am getting really brassed off with this CS92.

  6. #16
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    Quote Originally Posted by uhhu View Post
    I've contacted the installer who has spoken to Honeywell.

    They first told him that I am experiencing issues because not every radiator has the Evohome TRV, and that the first thing to do would be replace all the TRVs with the Evohome ones.
    The second person he spoke to said that even though the RF signal might say it's excellent on the controller, it might not be, and so the BDR91 should be moved around. The second person also said that the On and Off frequency for hot water is different and so it would need to be excellent for both - albeit there is no way to check until it is in position.
    Based on the above, I am not convinced that speaking to Honeywell myself will provide any real benefit.

    Honeywell have not said that it could be faulty, and so I have not explored that option.

    I managed to get it up and running again through randomly pressing the button on the CS92 out of frustration and it was all working fine, for a few mins, then it failed. I decided to screw it back into the wall and forget about it. The signal then came back and was back for around 3 hours, when I then remotely put the hot water on for me coming in from a run. When I arrived home, the signal was lost and little hot water.
    I have removed the batteries and reinserted them (as seen on another thread), and the signal is back.

    I can see on the other thread people have been bending and re-tensioning the battery fitments, but I really don't want to have to go through all that hassle for a product which is brand new and should work out of the box.

    With the exception of the heating not getting to the desired temperature in some rooms (which I can live with for now), it works well and I am enjoying the convenience. However, even if it failed, I have secondary heating options.
    I do not have secondary hot water options currently, and am getting really brassed off with this CS92.
    I have had a faulty CS92 on an install before, however it wouldn't do what yours was doing. It would loose COMMS then pick it back up more or less straight away. However it would never play up to the extent of the customer having no hot water, more just that it would just flash up the error on the Controller.

  7. #17
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    Quote Originally Posted by uhhu View Post
    They first told him that I am experiencing issues because not every radiator has the Evohome TRV, and that the first thing to do would be replace all the TRVs with the Evohome ones.
    That's total nonsense. There's no requirement to have HR92s on all radiators.

    Quote Originally Posted by uhhu View Post
    The second person he spoke to said that even though the RF signal might say it's excellent on the controller, it might not be, and so the BDR91 should be moved around. The second person also said that the On and Off frequency for hot water is different and so it would need to be excellent for both - albeit there is no way to check until it is in position.
    The first half of this sort of makes sense and sort of doesn't. What do CS92 problems have to do with the BDR91? Unless they're saying they think the CS92 is working fine, but then the link from the controller to the BDR91 is dodgy so you're not getting the right outcome? That's plausible. Remember, everything in Evohome talks via the controller - no other components talk to each other. How far are the CS92 and the BDR91 from the controller? We have a very large house (c. 4,000 sqft) with solid walls and we don't have these sorts of problems.

    Quote Originally Posted by uhhu View Post
    Based on the above, I am not convinced that speaking to Honeywell myself will provide any real benefit.
    Nothing to lose by trying!

    Quote Originally Posted by uhhu View Post
    I can see on the other thread people have been bending and re-tensioning the battery fitments, but I really don't want to have to go through all that hassle for a product which is brand new and should work out of the box.
    Again, it's worth a go. Your problems are broadly consistent with those reported by people who have battery connection issues. What have you got to lose?

  8. #18
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    quick question regarding the heating (I have a combi so know nothing about your hot water side of things).
    Was this a totally knew install with a new boiler, if so its likely that the boiler temperature may have been reduced to encourage condensing.. talk to your installer about it.
    Also a quite way to check if its the hr92 is to unclip it from the radiator. there is a little slider at the front. Once removed it will have no effect and as long as heat is being called for you can see how hot the radiator gets without the influence of the HR92.
    Also if you have an automatic bypass, it may be worth checking its setting,

  9. #19
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    Quote Originally Posted by dty View Post
    That's total nonsense. There's no requirement to have HR92s on all radiators.



    The first half of this sort of makes sense and sort of doesn't. What do CS92 problems have to do with the BDR91? Unless they're saying they think the CS92 is working fine, but then the link from the controller to the BDR91 is dodgy so you're not getting the right outcome? That's plausible. Remember, everything in Evohome talks via the controller - no other components talk to each other. How far are the CS92 and the BDR91 from the controller? We have a very large house (c. 4,000 sqft) with solid walls and we don't have these sorts of problems.



    Nothing to lose by trying!



    Again, it's worth a go. Your problems are broadly consistent with those reported by people who have battery connection issues. What have you got to lose?
    I'm c. 5,000 sqft, also with solid walls. The solid walls means that the boiler has been fitted on the wall in the laundry room which shares the same wall as the kitchen. The BDR91s have been fitted within the kitchen to remove one wall as a barrier, and the cable comes through a hole in the wall. However, the CS92 is still in the laundry room. This is partly due to the length of the wire, it's not long enough to get up and through the hole above the kitchen cabinets. Having said this, the signal strength shows as good or excellent, so I shouldn't need to put the CS92 in the kitchen.
    The BDR91s are around 10m from the controller currently. The controller cannot be moved, as one of the radiators is at the opposite end of the house. The controller is in the sweet spot as it talks to every room that I have a TRV installed. There are rooms that the controller will not get to, which is a separate criticism of the Evohome system, but it's also due to having a bigger than average property, so I am in no position to start complaining.


    I will give them a call now that the actuator problem has disappeared and its now only the signal failure.

    I don't want to tamper with the CS92 in case it needs to go back, I wouldn't want to do something which would void the warranty on it.

  10. #20
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    Quote Originally Posted by DBMandrake View Post
    Honeywell Valencia's by any chance ? I changed to those a few months ago and initially had problems, so I have a good suspicion about what your main problem may be. Try setting all your HR92's to stroke 1:

    For each HR92 go into the settings menu (hold the button down until you see the menu appear) then go to option 6, press the button, change it from 0 to 1, press it again then go to exit and press it one last time. This will change the pin stroke to maximum stroke. Then trigger a re-calibration of the valve by unlatching it, lifting the HR92 off it's base, turn the black wheel fully anti-clockwise, then put the HR92 back on and latch it again to lock it in place. After about a minute you'll see CYCL as it cycles the pin through it's movement range.

    If my hunch is right this will allow the radiators to get properly hot.
    So I tried this today on the worst of the radiators, and unfortunately the room temp. did not increase. I will speak to the installer about the size of the radiator and what he would expect as it may just be the radiator is not big enough.
    The radiator definitely feels hot hot, which was helped when I bled the radiators, and the system settings said that 100% was going to the room.

    As this was a relatively easy job to do, I will likely do on all the radiators and see what effect this has, even if its 1c, then its a benefit.

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