Diagnostic Codes
Possible Condition
Course of Action
1 flash, pause, 2 flashes,
Amplifier is over
Allow the amplifier
repeat; then the amplifier
temperature
to cool. When the LEDs
reverts to stand-by mode
stop flashing, the ampli-
fier has cooled down.
flash, pause, 5 flashes,
Short circuit
Check all connections
repeat; then the amplifier
on output
at the amplifier and loud-
reverts to stand-by mode
speaker binding posts.
Cycle the power breaker
switch (21) on the power
supply and attempt to
power on the amplifier.
Call the factory if the
problem persists.
1 flash, pause, 7 flashes,
Line frequency error:
Contact your local
repeat; then the amplifier
The amplifier is set for
authorized Krell
reverts to stand-by mode
60 Hz, but is attempt-
dealer or distributor.
ing to operate via a
50Hz system.
Output mutes while music
DC detected at input
Check source and
is playing, and then sound
during playback.
preamplifier for
resumes.
Input capacitors are
excessive DC output.
automatically engaged.
Once DC has been elimi-
nated, cycle the power
breaker switch (21) to
disengage the input
capacitors.
The power breaker switch
Possible component
Contact your local
(21) trips; then the amplifier
failure.
authorized Krell
powers off. The amplifier
dealer or distributor, or
repeats this action when
the Krell Service
powered on.
Department.
Evolution One amplifiers report operational issues by flashing the power/stand-by
LEDs (4) in red, in a specific sequence, or by tripping the rear panel breaker (21),
as follows:
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