August 27, 20196 yr Just fitted a Honeywell 8012 dual tech, on detector walk test I only see green light no yellow, it does seem to be a brighter green some times but never yellow. It does work ok at panel. I assume the led is a single colour changing and only shows one colour at a time.
August 27, 20196 yr Yes only the green and red leds will show unless there is a fault and the leds will flash differently depending on the fault code
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