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KO1 missing how do I reset?

After being on back up battery after a power cut we now have the message KO1 missing. Any ideas how to fix without calling engineer? Also engineer light is on.
9930 remote keypad
Model 9750 / 9850

Twinkle
July 2012
9930Security Systems, Home Alarm SystemsReset Battery Ideas
It wants an engineer reset.
Either Google for a engineers manual or call someone out.

Alarm
July 2012

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