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Looks like an older CEF challenger brand

Go into engineer mode Option 20 Time and date from engineer mode Option 51

Use ext3 and plug it into this port …

Bnc 5m lead plus a bnc to phono ….then either scart adaptor or plug straight into composite port ( if your tv has one ) normally a yellow phono input , then use tv external input button …

It could also be one of 3/4 other formats via a bnc …NOT SUPPORTED by a standard tv video inputs

Post picture of it ….

Pull fuse out , disconnect battery …short the two pins with screwdriver keep it shorted push the fuse back in , keep it shorted for 10 seconds, it should be 1234

Yes it only resets the code I take it you have tried entering the default engineer code ? Post picture of control panel is there a fuse isolator at the side of it

Screwdriver blade …

Do a stage 1 reset This only resets the master (1) code ( 1234) and engineer code ( 7290) as it’s been programmed as lid tamper engineer reset option 38 After doing this enter1234 to stop alarm , then box up Reset your code Reset time and date Do engineer reset

All your devices will be area A , go into engineer programming , go to area programming , arming modes , area A arm by …default is exit ….change to timed …

What is A setting type ….entry/exit or timed ….needs to be timed

Get ladders out and find out …then come back ….

Bit late now …after 20 years

Assume it’s wired correct

48 metal any day …

What panel/ bellbox is it ? Probably no one checked it before printing the manual

Problem with most cheap Chinese units …is they aren’t used to the uk weather …..

No … Are you sure you haven’t put a perticular zone on chime ? So every time you activate it ….it chimes

Ok …you didn’t say that ! it’s probably no good …replace full unit as it will be cheaper in the long run ….a battery is going to cost around a third of a complete unit which will come with a warranty