English – dB TECHNOLOGIES DVA MS12 User Manual

Page 11

ENGLISH

CHARACTERISTICS AND PROTECTION

Indications of operation model, malfunction, and safeties
The light indicators (LEDs) "READY", "MUTE/PROT", "SIGNAL" and "LIMIT" are also used to
indicate different modes of operation and different types of faults, by flashing sequences as
reported in the diagnostics table below.
The three types of failure are:
-

WARNING: a non-severe error or auto-reset malfunction is detected and the performance of
the speaker is not limited

LIMITATION: an error is detected and diffuser performance is limited. The sound level is
reduced or one or more amplifiers are disabled. This state partially influences the correct
functioning of the diffuser. If the problem persists the next time the module is turned on,
contact the support center for assistance.

FAILURE: a severe malfunction is detected. The speaker switches to “mute”.

If the case of a malfunction, before contacting the support center, try to turn the module off and on
to check if the problem still exists.

Cooling
The cooling of the amplifier is realized by convection on internal/external heat sinks without the aid

of fans

Thermal protection is ensured by an internal circuit which controls the temperature of the amplifier
and protects it from overheating by limiting the overall volume.
This intervention is marked by the flashing of a yellow indicator light "MUTE/PROT".
The correct volume and all the functions will be automatically restarted after normal operating
temperatures have been restored.

Protection
When the yellow “MUTE/PROT” LED turns on, it means that a malfunction has been detected on
the speaker, thus setting this to the mute position.
Perform the checks listed below:
-

Check if the speaker is properly connected to the power supply.

Make sure that the power supply is of correct voltage.

Check that the amplifier is not overheated.

Disconnect the speaker from the mains power supply, wait for a few minutes and connect
it again.

If after these tests the LED is still on, please contact an authorized service center.

DIAGNOSTICS TABLE

STATE OR

CONDITION OF THE

MODULE

LED

“READY”

LED

“MUTE/PROT”

LED

“SIGNAL”

LED

“LIMITER”

FUNCTIONS OR DESCRIPTION OF THE
MODULE

Normal operation
Power ON

OFF

ON for 5 sec.

OFF

Audio MUTED
Initialization of the amplifier module

Normal use

OFF

Normal
operation

Audio ACTIVE
Module initialization complete and correct

Partial fault

Cycling
flashing (quick
flashes)

Normal
operation

Audio ACTIVE
The module has detected a partial anomaly
and remains active with limited functions

Total fault

OFF

Cycling
flashing (quick
flashes)

Audio MUTED
The module has detected a serious anomaly
and is in protected mode