horstmann h37xl series 2 stuck in gravity mode

[bazzer1]

horstmann h37xl series 2 stuck in gravity mode, looks like there should be a rear plug to change it to pumped mode? or can i buy one ?

 

[snowhead]

I can't see any reference to it in the manual, has it just failed or is it new house to you or??

 

[bazzer1]

I can't see any reference to it in the manual, has it just failed or is it new house to you

I can't see any reference to it in the manual, has it just failed or is it new house to you or??

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 .

 

[snowhead]

Found this, is it how yours looks or is it like the second picture?

 

[brianmoooore]

There are links on the back of these to set parameters. Standard 0.1" link, IIRC.
Good quality programmers, but an absolute pain to program.

 

[brianmoooore]

Found this, is it how yours looks?

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiPq93Ajfn8AhVbSkEAHZ_BB2EQFnoECDMQAQ&url=https%3A%2F%2Fwww.tlc-direct.co.uk%2FTechnical%2FDataSheets%2FHorstmann%2FH37XL_I.PDF&usg=AOvVaw3sMMbIN97fioSzQwsvwv4S

View attachment 105865

Looks like there's different versions. The one I know has removeable 0.1" jumper links on the back bottom right hand corner.

 

[Eddy Currents]

These are either a small switch or a "jumper"
If you are sure it is 3 small pins then yes you can buy a replacement
You will have to check the dimensions but something like THIS is what you will need. Centre pin is common so it either joins pins 1+2 or 2+3 depending which mode you need

 

[bazzer1]

Found this, is it how yours looks?

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiPq93Ajfn8AhVbSkEAHZ_BB2EQFnoECDMQAQ&url=https%3A%2F%2Fwww.tlc-direct.co.uk%2FTechnical%2FDataSheets%2FHorstmann%2FH37XL_I.PDF&usg=AOvVaw3sMMbIN97fioSzQwsvwv4S

View attachment 105865

i wish, mine is the version 2 model where they have removed the switch !

 

[bazzer1]

Looks like there's different versions. The one I know has removeable 0.1" jumper links on the back bottom right hand corner.

yes thats what i have ,but no jumper ,can i buy them or make something ?

 

[snowhead]

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




Looks like it is just a shorting link between 2 pins

 

[Eddy Currents]

yes thats what i have ,but no jumper ,can i buy them or make something ?

see my link in my previous post

 

[bazzer1]

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

no its 3 small strips of circuit board with a dot under the middle strip .

 

[bazzer1]

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

 

[brianmoooore]

Can be found in plenty of old electronics, such as PCs, printers, etc.

 

[Eddy Currents]

no its 3 small strips of circuit board with a dot under the middle strip .

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