4.4.5 Fuse Protection
4.5 Main SMPS Protections
4.5.1 Overcurrent Protection
Main SMPS (Switched Mode Power Supply) transformer current of your
LINUS10
amplifier is continuously monitored. If over current occurs, the
main SMPS immediately stops working. Should there be an internal failure,
this feature prevents other parts being damaged.
4.5.2 Overload Protection
In case of extremely high output levels with heavily clipped output signals
and low loudspeaker impedances < 3
Ù
, this additional protection will re-
duce the amplifier stage output current limitation very quickly. If activated,
this indicates that the amplifier is running close to it’s absolute maximum
power capacity. In normal operation (no clipping or only slight clipping)
this protection should never be activated.
If active, this protection is indicated by a white LED behind the dust cover
(on the top left side of the dust cover).
NOTE: Please reduce the input level if you see this LED flashing.
4.5.3 Thermal Protection
The temperature of the main SMPS transformer of your
LINUS10
ampli -
fier is permanently monitored. If the temperature exceeds 85 °C, the main
SMPS is switched off. The amplifier’s display will indicate a main SMPS
error in this case.
4.6 Fans
The fans mounted in your
LINUS10
amplifier operate permanently, but
as long as the temperature remains below 40 °C, they run at their slowest
speed and can hardly be heard. The highest detected temperature from
either channel controls the speed of the fans. Above 40 °C the speed is
increased until it reaches its maximum value.
4 OPERA
TION
When driving the
LINUS10
at very high output levels over a longer period
of time (i.e. several seconds and minutes) the average mains current draw
can become very high. In such situations, the FuseProtect limiter will re-
duce the output signal in order to prevent the external mains breaker from
tripping. But this limiter in turn will not affect the output signal on dynamic
music signal and short current peaks, thus guaranteeing the full available
peak output power.
Due to the very large output power of the
LINUS10
, this limiter has been
set to a maximum average mains input current of approx. 24 A.
This design choice has been made to achieve the best compromise be-
tween mains breaker tripping protection and long term output power ca-
pabilities of the
LINUS10
. This choice allows the
LINUS10
to deliver more
output power over a longer time period, which it is easily capapable of. But
in turn this also means that mains breaker tripping still can occur when
driving the
LINUS10
at very high output levels over a longer time period.
Please note that the FuseProtect limiter only controls the average mains
input current, not the short term peak input current. This means that with
very dynamic music signals the (short term) input current can still reach
very high levels, which can be very demanding for a mains distribution.
See also chapter 3.3.3.If active, by a red LED behind the dust cover
(approx. in the top middle of the dust cover).
CODA AUDIO
LINUS 10
USER MANUAL v1.0
CODA AUDIO LINUS10
P. 29