Alcad KVS-54221 Manual De Instalación página 22

TROUBLE SHOOTING
Nothing works
Check whether the LED of the power supply
unit is unlit
With LED unlit: a) check the mains voltage,
b) disconnect terminals B3, B2 and B1, B2 of
the power supply unit and check the voltage
in the terminals. If no voltage is detected in
these terminals, the power supply unit may be
defective.
With LED lit: check the voltage between
terminals B3, B2 and B1, B2. Disconnect
terminals B3, B2 and B1, B2 of the power
supply unit and re-check the voltage in the
terminals.
If no fault is detected, the power supply unit or
the audio unit may be defective.
The pilot of the lighting pushbutton does not
light up
Check connection 30 between the speaker
module and the audio unit. If no fault is detected,
the speaker module may be defective.
The card-holders do not light up
Configure the lighting in continuous mode (see
page 9).
If the card-holders remain unlit, check the
connection of the pushbuttons with the audio
unit. If no fault is detected, the audio unit may
be defective.
If the card-holders light up, check connection
30 between the speaker-microphone module
and the audio unit. If no fault is detected, the
speaker module may be defective.
ENG-22
2-WIRE VIDEO DOOR ENTRY SYSTEMS
The entrance panel does not emit any sound
when a call is made
Check whether the call rings on the monitor; if
it does, see the following paragraph. Check the
connection of the pushbuttons with the audio
unit. Check also that there is a bridge of red
cable in the IN connector of the pushbutton
cartridge. If the source of the problem is not
detected, the audio unit or the pushbutton
cartridge may be defective.
The call rings on the monitor but the en-
trance panel does not emit any sound when
the call pushbutton is pressed
Check connection 30 between the speaker-
microphone module and the audio unit. Check
the adjustment of the volume control in the
entrance panel. If no fault is detected, the audio
unit or the speaker unit may be defective.
The entrance panel emits beeping tones
when a call is made
The call does not ring in the monitor. Make
sure that the monitor has been programmed.
Check that the programming switch of the
connections bracket is in the ON position. Verify
the B1, B2 connection of the power supply to
the monitor.
Feedback is produced
Adjust the volume controls in the audio unit and
in the monitor.
The sound quality seems choppy
Lower the volume from the control of the same
monitor. If the source of the problem is not
detected, other noises from inside the house or
flat may be the cause of the problem.