17 Service Mode LIJ After Cancel, press pad Heavy and Fast simultaneously for LED Test/Delete Alarm Memory least 4 seconds to access Service Mode. After assessed Service mods ( Led Heavy, Led Normal and ten i U | LED Heavy, Led Normal and Led Fast bunk to Indicts Led Fast unblinking: that Service mode is access. 1. Press pad Normal to start tis function. Asseverated Service mods { Led Heavy, Led Normal and All LESS and display boinks 6 seconds on 1 second off.