Pyronix keypad fault

[Pisto]

I need to change the code on a pyronix keypad as the buttons used for the code no longer work. I know the current code and the other buttons are working fine do I just want to change the code. I have attached photos of the inside and outside of the panel in the hope that someone will know how to set a new code. Many thanks for any help you can give.

 

[Bigsosij]

 

[sparkymarka]

Is it 1380 …..
take keypad apart and clean carbon tracks on pcb and carbon blobs on the keypad mat , with meths on a cotton bud …

 

[Pisto]

Bigsosij and sparkymarka thank you for your quick response and very helpful advice.

 

[Pisto]

I managed to reprogram it and hey presto, I have buttons that work. Thank you both very much.