Five years ago I installed a Honeywell Accenta Mini Gen 4.  It worked fine until a few days ago when I tried to do a walk test. It didn't get past the "Walk Test" line, and didn't respond to key presses.

Did an engineer's reset, and on starting up again there was again no response to key presses, so was unable to enter the code. Did a partial reset (codes), and the same happened.

Has the panel had it? Interestingly, it is in the loft void, which can get hot, and this was on one of the hottest days of the year.
 

When was the last time the battery was replaced?

The battery was replaced less than a year ago, Peter. Reputable make.

Did you check the system voltages and charging rate when the battery was replaced?

It could also be that the battery has failed again, have you tried resetting on mains alone?

Could there be another fault with field wiring or equipment, you would need to disconnected and isolate things correctly one by one to test this.

OnoN

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No to the first question.

 

Yes to the second.

 

Have not disconnteced individual components yet, but I will do so.

 

I suppose if everything is disconnected and the the default codes still cannot be entered, that suggests a fault with the panel. Must admit that my assumption was that a panel fault would have have had a different result, such as just not working.

 

Thanks for replying.

Best to try defaulting with just the panel on a short test wire to the keypad, making sure all tampers are closed.

 

Do you have a spare keypad you can try (to rule out a keypad issue)

Check you haven't disturbed any connection both at the keypad and panel end

 

 

Another suggestion to try:-

Power the unit up mains only

As I know if they are powered up battery only (on a suspect battery) this could cause an issue

 

Edited June 24, 20178 yr by aissecur
add info

Thank you everyone for the various suggestions. In answer to the last, there are two keypads, for each of which there is an isolation switch, and the system has been tested with each indivdually.

 

I shall now have to try the long way to identify the fault, disconnecting everything in turn. Actually, what I will do is use a "binary chop", in other words disconnect half the detectors, for example, and then (if the fault is not one of those) the other half.

Edited June 24, 20178 yr by Peter 23
error

diss one of the keypads put it on a short wire and wire it directly into the panel. with that keypad only 

I can see that this is going to take some time.