If you have one of the models below and your display is showing either " key update due -refill soon" or "key lock out - call service", your need to perform a Re-key update.
DM400
DM800
DM500
DM900
DM550
DM1000
This re-key update will ensure your DM Series system has access to future rates and software upgrades.
Print out these easy step-by-step instructions that will guide you through the update process.
