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unknown key pad display?

key pad shows,nvm cheaksum flt. dont no what it means

George Wales
February 2011
Security Systems, Home Alarm SystemsUnknown Key Pad
Sounds like its had a power spike.
Try putting code in and setting.
If that does not work,
Turn off all power and remove battery.

DANGER MAINS VOLTAGES PRESENT, IF UNSURE CALL IN A PROFESSIONAL.

Power back up and enter code, if that fails its new alarm time.

Alarm
February 2011

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