Castle Care-Tech Euro Mini - error 485 COMMNS LOST

[mel]

Hi,

 

I self-installed a Euro Mini about a year ago. I have two keypads installed, one upstairs and one downstairs. It's been working fine since I installed it but now its giving me error 485 COMMNS LOST. Neither of the keypads respond.

 

If I open the panel box or the keypad to fault find, the tamper alarm will sound and I have now way of overriding it!

 

1. Any ideas what would cause this problem (error 485)? Does the keypad or panel have a keypad fuse? If so would a blown fuse cause this error?

 

2. Without a working keypad, how do I override the tamper alarm?

 

Thanks in advance.

[Secware_Tech6]

You have a 485 line problem, either hardware or cable.

 

I would disconnect both keypads at the panel and then wire one of them directly to the panel on a short lead. Try both keypads independantly.

[mel]

Will the SAB sound when I open the panel box? If so, how would I silence the SAB while I'm testing the keypads?

[Secware_Tech6]

If the system is set then yes. If it isnt then the externals should not sound.

[mel]

Thanks for your reply.