PTI security systems VP keypad controls entry, Installation And Operation Manual

Page: 32 / 40

28 29
4. If there are multiple problems or ongoing issues, the process in the
previous step can be performed for an entire site. Generally, multiple
problems are a sign of problems in the wiring, either from bad
splices, pinched or nicked wires, radio frequency interference, water
in the conduit, or incorrect wire type. To check an entire site, allow for
access and egress of customers and open the housings and unplug
the power and data terminal blocks on every AI device on the site.
When every device on the site is unplugged, add one device back
into the system at a time. Allow that device to function for an hour
and then add in the next device in line. Eventually, a device will be
added that causes the problem to manifest. Switch this device with
one that has been previously added to verify if the problem exists in
the location or in the device.
5. Verify that all devices are receiving enough power. Create a voltage
map of the site by sketching out the locations of every AI device on
the site. Use a multimeter to take DC power readings at each device.
Note these readings on the sketch. Any device that is receiving less
than 12V is underpowered and can cause the entire system to lock up.
Test individual devices
To test individual devices, use the following procedure:
1. Try a code or card at the AI device controlling the gate. Be sure the
code or card is one that is known to be working at that location and
time. Try several codes to verify operation. Note which code(s) were
tried and the response at each device as well as the response that
appears on the event log.
2. Try the same code(s) or card(s) at other access devices on the
property. Compare the result with the previous step. Try to narrow
down which devices are affected.
3. To determine whether the problem is in the device or the location,
make sure to allow for access and egress of customers and then
remove the device in question. Switch the device with another
similar device that has been proven to be working. For example, if
the entrance keypad isn’t working, but the exit one is, then switch
the two. Be sure to switch the addresses also. If the problem stays
in the same location, it is probably a wiring issue. Contact a service
company to check the wiring.