Trouble Shooting - Alcad ALS-020 Manuel D'installation

AUDIO UNIT GRF-302
POWER SUPPLY:
OPERATING TEMPERATURE:
NORMAL VOLTAGES DEPENDING ON THE STATE OF THE EQUIPMENT
Values are valid provided that no special power supply is used for the electric lock.
(1)

TROUBLE SHOOTING

Nothing works
Check whether the LED of the power supply unit
interface is unlit.
With LED unlit: a) check the mains voltage, b)
disconnect terminals B3, B2 and B1, B2 of the
power supply unit interface and check the voltage
in the terminals. If no voltage is detected in these
terminals, the power supply unit interface may be
defective. If a voltage is detected, check that there is
no short circuit in the connections B3, B2 or B1, B2
between the devices of the installation.
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 interface and re-
check the voltage in the terminals.
If no fault is detected, the power supply unit interface
or the audio unit may be defective.
The pilot of the lighting pushbutton does
not light up
Check connection 30 between the speaker-
microphone module and the audio unit. If no fault is
detected, the speaker-microphone module may be
defective.
The card-holders do not light up
Confi gure the lighting in continuous mode (see
"How to connect the audio unit to the pushbutton
ENG-20
2-WIRE DOOR ENTRY SYSTEMS
TERMINALS AT REST
+,–
B3, B2
B5, B4
22, 18 3,3 V
SC1, 18
SC0, 18
12, 11
12c, 11 12,5 - 18 V
GRF-302
Voltage:
Current:
-10.. +55
WORKING
12,5 - 18 V
12,5 - 18 V
12,5 - 18 V
0 V
±10%
0 V 4,5 V
0 V 4,5 V
0 V 12,5 - 18 V
0 V
(1)
panel", page 18).
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-
microphone module may be defective.
The entrance panel does not emit any
sound when a call is made
Check whether the call rings on the telephones;
if it does, see the following paragraph. Check
connection B3, B2 of the entrance panel to the
power supply unit interface. Check the connection
of the pushbuttons with the audio unit. If no fault is
detected, the audio unit may be defective.
The call rings on the telephones but the
entrance 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 may be
defective.
The call does not ring on a telephone
If the entrance panel emits beeping tones, see the
following paragraph. If the call confi rmation is
heard at the entrance panel, check that the call
volume control switch on the telephone is not in the
12,5 - 18 V
350 mA (max.)
O C
±10%
±10%
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