Optima 2 Plus Zone fault

[Litch90]

Discovered an Optima 2 Plus panel today on my travels, went to do a full service for the customer.

 

When attempting to set, i had 6,5 & 2 on the visual display, obviously zone faults... However, i checked all cables, terminations & present voltage at the detectors.

 

All came back fine. What else could this be? The only thing I did not try today was replacement sensors (they are as old as the hills) 

 

I'll hold my hand up and admit I've seen this panel maybe three times so i'm not overly familiar with it. Any suggestions?

 

Thanks 

[MrHappy]

you check the resistance of the circuits ?

[Litch90]

10 minutes ago, MrHappy said:

you check the resistance of the circuits ?

Thanks for your reply bud

 

Across the three zones they were each giving something off in the ranges

 

0.6

0.12

0.8 

 

If i remember correctly.. what sort of readings would you expect on this system MH?

[sixwheeledbeast]

If that's Ohm's they're either all mounted adjacent the panel on one foot of cable or you didn't disconnect them from the panel before testing?

[Litch90]

0.12 was indeed mooted just about half a metre from panel

 

0.66 was living room.. so about 4/5 metres from panel

 

0.8 is a tricky one.. mounted at least a good 10 metres away

 

What do you reckon? Belled the cores individually on the 8C comes back fine no damaged cores.

[Litch90]

*mounted not mooted 

[MrHappy]

if the zones show open when the cicuit is closed

 

did you check resistance between alarm & tamper pairs ? (2+ had tamper per zone (IIRC))

 

Before changing any devices I'll link zones out & see if the panels goosed, it will on or around 25 yrs old ?

[The Arab]

I had this once and did the down power count to 10 and repower and fault cleared, have also had them do similar when the battery is faulty