Niles SI-1260 Installation & Operation Manual page 24

Channel Pair LED Indicators
The 51-1260 incorporates individual multi-colored LEOs for each channel-pair
that indicate the following:
CHANNEL PAIR LED STATUS
OFF
The channel pair is OFF.
Solid Green
The channel pair is
active
and operating normally.
Fast Red Blinking
Indicates a possible short circuit or low impedance condition.
(Three Times Per Second)
Speaker wire strands that are touching at the speaker or the ampli-
fier's speaker terminals and/or a damaged speaker wire can cause
a short circuit. More than three pairs of 8 ohm speakers attached
to the same amplifier channel present the amplifier channel with a
low impedance. Both of these conditions will cause the LED indi-
cator to blink red very quickly. Eliminating the short circuit or con-
necting a proper speaker impedance load will enable the channel
pair to resume normal operation.
Slow Red Blinking
Indicates the channel pair is overheating due to inadequate
(Once Every Three Seconds) ventilation. Providing proper airflow to the amplifier will
eliminate this problem (refer to page 75, figures 77 and 72 for
amplifier placement details).
Solid Red
There is a
damaged internal component
in this channel pair
module.
The amplifier should be returned to Niles for service.