Pyronix E46 Alarm Keyboard

Hi
I'm new to this forum and not very technical.
I have a Pyronix Euro 46 keypad on the Hall wall as part of an Alarm System installed by the builder in my new build house.
The installation was maintained free of charge by the supplier/ installer for the first year but I did not renew the contract so the system is no longer maintained.
This morning we had a powercut which lasted a couple of seconds and following this the keypad is flashing yellow at the top LHS.
I assume the system needs to be reset but I don't know how.
I would be grateful for information on what I have to do to fix the flashing light problem.
Thanks.

Code and press yes
Or start to set alarm and then turn off should reset system

Thanks for your response.
Sorry to be so thick.
We used a Fob to operate the alarm when we had a maintenance contract but we stopped that contract and don't use the alarm system any more.
Is the Code the 4 digit passcode that would have been loaded into the Fob at set up?
I'm a bit confused. Just seen a You Tube video that said key in the 4 digit code to display an error type message eg "Mains Absent" and then press "No" twice.
Is it then Yes or No?
Thanks.

Put your code in
Screen displays active faults
No to acknowledge the fault
Then no again to tell system you don’t want to arm it.

Screen should be back to normal after that