Specifications

bellissimo 2-72 Way Video Entry System
PD-098 Issue 3C Installation and Operating Manual Page 23 of 40
Troubleshooting
Common Faults
A very high percentage of calls to our technical support number, regarding new
installations, are resolved to faulty wiring. The reasons for these are various: -
Broken cores, especially short links, sometimes broken inside the insulation!
Connectors clamped onto the insulation instead of copper.
Wire in the wrong side of a rising clamp connection, the clamps need to be unscrewed
far enough to stop the wire going “underneath”.
Shorts or opens due to cables having been stapled or nailed through.
A common fault is wiring a connector left to right instead of right to left, or one or more
twisted pairs the wrong way round.
Tip. The heads of screws on connectors are not a reliable means of making a connection
with a meter, try pushing the probe into the wire entry point.
Quick Fault Reference
These tables provide a quick indication of the possible fault.
Power Problems
Videophone resetting
(The three indicators lights
show the power on sequence).
 Power supply intermittent short or overload.
 More than 1 extension enabled for auto display.
 Lock output short-circuit; see ‘Lock Problems’
28V LED does not light on
controller.
 Temporarily remove connection to 28V+ output. If it
now comes on there is a short on the phone cabling.
 12V input connections are reversed.
PS4 output voltage fluctuating,
meter reading unstable.
 Output overload is causing current limit to operate,
check grouping of controllers to power supplies, see
page 10 for details
 See Lock Problems below
Call Problems
Videophone does not ring or
flash when called
 Videophone off hook or muted on full mute.
 No power to videophone; check that the red mute
lamp flashes when the handset is picked up.
 Data wiring has a fault, Data A or B broken.
 0V to controller missing on separately powered
videophone.
 Pushbutton wiring error, try short length at
controller.
No extension videophone rings
or flashes when called
 Master videophone off hook or muted on full mute.
Green Lock light on videophone
flashes once when called
 Videophone set to slave with no master present or
responding.