Operation Manual

TROUBLESHOOTING HINTS
An easy way to check that the system is working properly is to disconnect the wiring from the door
panel and to check the monitor directly connected to the door panel terminal connector.
No shortcircuit will damage the connected units, with the exception of a shortcircuit between
CTO and ' ' monitor or distributor terminals.
O Nothing operates.
w Check the output power supply voltage between ' ' and '+' terminals: it should have 17,5 to
18,5Vd.c. If not, disconnect the power supply from the installation and measure again. If
it's correct now, it means there is a short circuit in the installation: disconnect the power
supply from mains and check the installation.
w Check that 'D' terminal is not shortcircuited with ' ' or '+' terminals.
w Check that 'D' terminal hasn't been changed by 'A' terminal somewhere in the installation.
O Inappropriate audio level.
w Adjust the level volumes as shown on page 113. In case of feedback, reduce the audio levels
until feedback fade out. If feedback don't dissapears refer to the following hint.
O Continuous audio feedback.
w Check that 'A' terminal is not shortcircuited with other terminals.
O Door open function no operates.
w Remember that this function is only available during call and communication progresses.
w Disconnect the lock release from door panel terminal connector and short-circuit terminals ' '
and 'CV ': at that moment the output voltage between terminals 'CV+' y 'CV ' should be
12Vd.c. If it's so check the lock release and its wiring.
O The system cannot be programmed.
w If you are programming push buttons door panels, check that the switch number 2 of the
configuration dip switch is set to ON, and that the programming steps are correctly
followed. In case of coded door panels, check that the panel is into program mode (see
pages 123 and 126).
w Check that 'D' terminal is not shortcircuited with other terminals.
w Check that the door panels jumper corresponding to the communications resistor are properly
placed, as shown on the installation diagrams.
O Some units don't receive calls.
w Remember that each apartment must have a master unit only. Check that the units are
switched on and correctly programmed.
w Make sure that the master monitor or phone is switched on.
OThe monitor does not show images.
w Make sure that the doorpanel is configurated with camera (see page 115).
w Check the proper connection of coaxial cable or twisted pair by means of the diagrams
shown on pages 140 to 149.
OThe monitor shows a distorted or a low-defined image.
w Check the proper connection of coaxial cable or twisted pair by means of the diagrams
shown on pages 140 to 149, pay particular attention to the cable correct polarity.
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NOTAS / NOTES
155