Honeywell ST9500C time cannot be set.

[unity70]

Hi - my honeywell st9500c is currently showing year 2010. When i select set date.time i cannot change any entries , i get the message "invalid entry"

tried a power off/power on
tried moving slider up and down and back to "set date and time"...but the time never flashes so enable me to set it.

any idea? thanks

 

[stem]

I think installer mode may have a setting that prevents the clock being changed. You can enter installer mode by pressing the [OK] and [-] keys simultaneously for a few seconds. Once in installer mode you should be able to change the setting. Use the [OK] button to step through the menu.