VP Keypad Access Device
39
rev. 7-2017 114A3868.E
Test multiple devices or entire site
Generally, multiple problems are a sign of wiring issues, either from
bad splices, pinched or nicked wires, radio frequency interference,
water in the conduit, or incorrect wire type.
To check the entire site for problems, use the following procedure:
Allow for customer access and open all device housings.
Unplug the power and data terminal blocks on every AI device
on the site.
Once every device on the site is unplugged, add one device at a
time back into the system.
Allow the device to function for an hour and then add in the next
device in line.
Eventually, a device will be added that triggers the problem.
Switch this device with one that has been previously added to
verify if the problem exists in the location or in the device.
If the problem stays in the same location, it is probably a wiring
issue. Contact a service company to check the wiring.
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