Trouble Shooting - Alcad GRF-400 Manual De Instrucciones

TROUBLE SHOOTING

Nothing works.
Check the mains voltage in the power supply unit. Check that the
voltage between + and – of the power supply is 17 ±10% Vdc.
Check for the existence of a short circuit and rectify this. Disconnect
the power supply for 1 minute and then reconnect it. If ithe
breakdown continues, disconnect all the power supply + and –
terminals, and check that the voltage between + and – is 21 ±10%
Vdc. If you cannot find the fault, there may be something wrong
with the power supply.
The card holders do not light up.
Check that the voltage between + and – of the power supply that
supplies the audio unit is 17 ±10% Vdc. Check whether the lamp
is burnt out.
You cannot hear any sound on the entrance panel when a call
is made.
Check the connections between the audio unit and the push-
buttons. If you cannot find the fault, there may be something wrong
with the audio unit.
When a call is made, the telephones ring but confirmation of
the call cannot be heard on the entrance panel.
Check the volume control of the entrance panel audio unit. If you
cannot find the fault, there may be something wrong with the
audio unit.
It is not possible to make calls.
Check that only one entrance panel has been defined as the main
one. Check wether there is a short-circuit in the connections D1,
D2 from the audio unit to all the devices. If required, check
connections D3, D2 of the equipment in the installation. If you
cannot find the fault, there may be something wrong with the
audio unit.
If intermittent tones can be heard on the entrance panel when
a call is made.
The call tone cannot be heard on the telephone: Check that the
handset is not off the hook. Check that the programming switch
of the telephone is in ON position. Check connections D1 and D2
from the audio unit to all the telephones. If required, check
connections D3, D2 of the equipment in the installation. If you
cannot find the fault, the telephone, the audio unit or some other
equipment in the installation may have broken down.
D I G I T A L D O O R E N T R Y
No telephone can be heard from the entrance panel.
One telephone cannot be heard from the entrance panel.
You cannot hear the entrance panel on any telephone.
You cannot hear the entrance panel on a telephone.
The sound produces feedback.
The electric lock doesn’t work.
In installations with multiple points of entry, calling on one of
the entrance panels does not deactivate the other panels of
the system.
In housing compound installations, making a call from one of
the external entrance panels does not disable the entrance
panels of the building which is being called.
S Y S T E M S
Check the volume control on the panel. If you cannot find the fault,
there may be something wrong with the audio unit.
Check the cable connections between the receiver and the base
of telephone. Check the hanging-up button on the base of the
telephone. If you cannot find the fault, there may be something
wrong with the telephone.
Check the volume control on the devices (on the panel). If you
cannot find the fault, there may be something wrong with the
audio unit.
Check the cable connections between the receiver ande the base
of telephone. Check the hanging-up button on the base of the
telephone. If you cannot find the fault, there may be something
wrong with the telephone.
Adjust the feedback control of the audio unit (see step 1 on page
18). If the feedback persists, lower the volume using the volume
controls of the audio unit.
With the jumper between terminal 10 and
voltage between 12 and 11 in the audio unit is 17 ±10% Vdc, by
making a bridge between terminals 22 and 11. If you cannot find
the fault, there may be something wrong with the electric lock.
Check connections D3 and D2 between the different panels of the
system. If you cannot find the fault, there may be something wrong
with the audio unit.
Check connections D3 and D2 from the entrance panel to the
identifying accessories of the building. If the fault cannot be found,
there may be something wrong with the audio unit or the identifying
accessory.
, check that the