Inovonics FA422 - Manual (Page 10)

FA422 Installation Manual Page 10 of 11 02793.FM
Troubleshooting
The Expander contains a number of diagnostic LEDs that will aid in troubleshooting system problems. Since some of these
LEDs only are visible with the cover off, this section will be divided into troubleshooting with cover on and troubleshooting
with cover off.
Troubleshooting with the Cover On
Three diagnostic LEDs are visible when the Expander cover is on: DECODE, VALID, and REPLY. The way they help to trou-
bleshoot a problem is as follows:
The REPLY LED shows the status of the communication between the Expander and the control panel. This LED should flash
once each time it responds to a data request from the panel. During normal operation, REPLY should be continually flashing.
The DECODE LED flashes to show that the Expander is active and listening. If it is not flashing, check to make sure that
power is supplied to the Expander.
The VALID LED shows the status of the successful number of signal decoding attempts of the 900 MHz radio receiver on the
Expander. This LED should flash each time the receiver successfully decodes an incoming signal from an Inovonics transmit-
ter that was programmed into the system. When a transmitter sends an alarm or check-in signal, VALID should start flashing.
Troubleshooting with the Cover Off
All three diagnostic LEDs visible with the cover on are also visible with the cover off. Therefore, all troubleshooting tech-
niques discussed in the previous section also apply to this section.
Additional diagnostic LEDs are visible with the Expander cover off. These are the LEDs used for transmitter programming.
They can be used to troubleshoot problems with individual transmitters by allowing the installer to check how it was pro-
grammed.
To check how a transmitter was programmed, do the following:
1. Locate the transmitter’s reset pushbutton. (Refer to the transmitter’s user manual.)
2. Press the transmitter’s reset pushbutton one time and note which programming LEDs light. (The lighted LEDs will stay on
for a few seconds.) If the wrong LEDs light up, the transmitter had been misprogrammed.
(Note that if the SELECTED LED located beneath the DIP switches is on, this only indicates that the transmitter was pro-
grammed with one or more custom options. The current positions of the DIP switches will not necessarily indicate which
options were selected.)
REPLY Status
Always Off Flashing Always On
Probable Causes
of Problem:
Broken cable connection
No power to Expander
Panel communication problem
Expander address not programmed at
panel
Broken Expander
Normal Broken Expander
VALID Status
Always Off Flashing Always On
Probable Causes
of Problem:
No power to Expande
Broken or unprogrammed transmit-
ter(s)
Broken Expander
Normal
(when a transmitter is activated
or checkin gin
Transmitter programming problem
Broken Expander