Discuss horstmann h37xl series 2 stuck in gravity mode in the Central Heating Systems area at ElectriciansForums.net
I can't see any reference to it in the manual, has it just failed or is it new house to you
hi bought second hand,,on the back of the timer it says 'remove link if fitted for gravity systems' and there is a small square hole allowing access to 3 circuit board connections, no info in the manual but i did find some info saying in gravity mode ch2 will close ch3 when open which is what is happening to me .I can't see any reference to it in the manual, has it just failed or is it new house to you or??
Looks like there's different versions. The one I know has removeable 0.1" jumper links on the back bottom right hand corner.
i wish, mine is the version 2 model where they have removed the switch !
yes thats what i have ,but no jumper ,can i buy them or make something ?Looks like there's different versions. The one I know has removeable 0.1" jumper links on the back bottom right hand corner.
see my link in my previous postyes thats what i have ,but no jumper ,can i buy them or make something ?
no its 3 small strips of circuit board with a dot under the middle strip .Just checked pictures on Ebay and it looks like series 2 has the removable link second picture.
If it's just pairs of pins then probably like this, as used on Printed circuit boards in P.Cs etc
View attachment 105869
Just checked pictures on Ebay and it looks like series 2 has the removable link second picture.
If it's just pairs of pins then probably like this, as used on Printed circuit boards in P.Cs etc
View attachment 105869
Looks like it is just a shorting link between 2 pins
View attachment 105873
This is not a removed link but intentionally omitted by the manufacturerno its 3 small strips of circuit board with a dot under the middle strip .
yes its looking that way ,oh well thanks for the help i will buy new .This is not a removed link but intentionally omitted by the manufacturer
There may be a switch or jumper pins in some models soldered onto this PCB but not in yours unfortunately
It may be possible to add your own but not advised without knowing which pins do what and if there are further components missing inside which is highly likely
Reply to horstmann h37xl series 2 stuck in gravity mode in the Central Heating Systems area at ElectriciansForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.