Ho After Cancel, press pad Heavy and Fast simultaneously for LED Test/Delete Alarm Memory MN 3 at least 4 seconds to access Service Mode. After accessed Service mode ( Led Auto, Led Heavy and = a LED Auto, Led Heavy and Led Normal blink to indicate Lad Normal blinking): 3 0 that Service mode Is accedes. 1. Press pad Heavy to start this function. si men mt sn | [eae |. 3 After accessed Service made (Led Auto, Led Heavy and All LESS and display blinks 5 seconds on 1 second off.