Conventional Systems Technical Manual - Alcad

7TROUBLE SHOOTINGCheck that the connections of the different elements are the same as that shown in the corresponding diagrams. Check voltages inall terminals are the same with indicated in the chapter 2 " Technical data". In order to help in the location of the problem, thereare some situations could be found.ELECTRONIC DOOR ENTRY INSTALLATIONS.ELECTRONIC CALL. CONVENTIONAL 4+N SYSTEMSTANDARD INSTALLATION IN BUILDINGNothing works.Check the mains voltage in the power supply. Check that thevoltage between V~, of the power supply is 12 ± 10% Vac.Check wether there is a short circuit and fix it. Disconnect thepower supply for 1 minute and then connect it up again.If it still doesn't work, disconnect all the power supplyV~, terminals, and check that the voltage between V~, is12 ± 10% Vac, if it is not, then there may be something wrongwith the power supply.The card holders don't light up.Check that the voltage between V~, of the power supply is12 ± 10% Vac.Check that the voltage between 9,10 in the audiounit, with the lighting push button activated, is 12 ± 10%Vac.Check wether the lamp has burnt out.The lighting push button pilot does not light up.Check that the voltage between the V~, of the audio unit is12 ± 10% Vac. If the voltage is correct, there may be somethingwrong with the audio unit.You cannot hear the call tone on any telephone.Check that the voltage between 7,2 on the audio unit, withoutpressing the push button, is 9 ± 10% Vdc. Check the connectionbetween 7 on the audio unit and the push buttons. Check connection2 from the audio unit to the telephones. If you cannot findthe fault, there may be something wrong with the audio unit.You cannot hear the call tone on a telephone.Check wether the telephone is off the hook. Check connections5,2 from the telephone to the audio unit.If you cannot find the fault, there may be something wrong withthe telephone or the panel push button.You cannot hear the call confirmation on the entrancepanel.Check that you can hear the telephones on the entrance panel.Check that the call tone rings on the telephones. If you cannotfind the fault, there may be something wrong with the audiounit.You cannot hear any telephone from the entrancepanel.Check connections 3,2 from the audio unit to all the telephones.Check the volume control on the panel. If you cannotfind the fault, there may be something wrong with the audiounit.A telephone cannot be heard from the entrancepanel.Check connections 3,2 from the telephone to the audio unit. If you cannot find the fault, there may be something wrongwith the telephone.The entrance panel cannot be heard on any telephone.Check the connections 4,2 from the audio unit to all the telephones.Check the volume control of the telephones on thepanel. If you cannot find the fault, there may be somethingwrong with the audio unit.You cannot hear the entrance panel on a telephone.Check connections 4,2 from the telephone to the audio unit.If you cannot find the fault, there may be something wrong withthe telephone.You can hear whistling on the panel. The soundproduces feedback.Reduce the volume of the sound using the volume control onthe audio unit.The electric lock doesn't work.Check that the voltage between 1,2 on the audio unit,without pressing the lock release button, is 18 Vdc. Check thatthe voltage between 11,12 on the audio unit, when you pressthe lock release button, is 12 ± 10% Vac. If you cannot find thefault, the electric lock may be broken.289