When the amplifier has cooled back down to its normal operating
temperature the red “max” LED’s and “thermal” LED’s will extinguish. The
green and amber signal LED’s will become operational, and power to the
loudspeakers will ramp up to the previous set level.
DC Protection
If more than ±5 volts appears on the amplifier outputs the power supply will
shut down. Switch "OFF" the amplifier and check that the source of DC is
not external to the amplifier i.e. controller sense lines etc. If the fault has
been cleared, switch "ON" the amplifier and it should power up as normal.
If the amplifier shuts down again the DC voltage has either not been
cleared or the amplifier is faulty and will not power up again until it is
repaired. The amplifier has to be re-set by turning the amplifier "OFF" then
back "ON".
Short Circuit / Over Current Protection
The power supply will shut down if a short circuit appears on the amplifier
outputs, or the amplifier tries to supply more current than it can provide.
The amplifier has to be reset by turning the amplifier "OFF" then back "ON".
If the short circuit or very low impedance load is still present at the outputs,
the power supply will again shut down instantaneously.
High Frequency Protection
If the amplifier detects out of band high frequency, high power output
signals, the power supply will shut down, protecting the amplifier and HF
drive units from burnout. The amplifier has to be re-set by turning the
amplifier "OFF" then back "ON", to initiate a power up sequence.
Power Supply Thermal Protection
In the unlikely event that both fans become blocked or fail, the amplifier will
continue to operate until the power supply reaches its maximum operating
temperature. At this point a thermal trip will activate to prevent permanent
damage to the power supply, and the power supply will shut down. The
amplifier has to cool down to its normal operating temperature before it can
be re-started. The amplifier has to be turned "OFF" then back "ON" again,
to initiate a power up sequence. The cause of the blockage must be
removed or the fans replaced. The amplifier will not power up until the
temperature has dropped to a safe level.
Martin Audio – E1300 Amplifier
E
NGLISH
19
All material © 2007. Martin Audio Ltd. Subject to change without notice.
