Honeywell CP038 - Call Engineer Reset required - CU BATT

[NorrisBerkshire]

I am hoping there is an alarm expert on here who may be able to help me .
I have a Honeywell CP038 which is currently displaying Call Engineer - reset required. I have user and manager access codes, not an engineer one. I have tried 112233 which from looking in the manual is the default one. From scrolling through the errors they all mention CU BATT.
So, I am wondering is there a backup battery that needs replacing behind the pin pad, although that seems tamper proof, i cannot see anything else related to the alarm.
Or is there any way i can get rid of the message if i dont have the engineer code.
If there is anyone out there with this knowledge who could help me, i would be really grateful.

 

[Nerdish Nerd]

How old is the Panel battery?

 

[sparkymarka]

You need to find the big "grey box " around A3 size the battery is in there ....a 7.0ah will do

 

[NorrisBerkshire]

Thank you so much. I will go in search of the box, I suspect its in the loft as i checked the cupboards and garage and could not find anything. The alarm was in the house when we moved in 2 years ago, so no idea when it was last changed. Thanks again, much appreciated

 

[GalaxyGuy]

Will look something like the metal cased unit in this picture:

https://www.security.honeywell.com/uk/products/intruder/control-panels/g2-series/462370.html