User guide

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Appendix A: Front Panel LEDs
Understanding the ISY’s front panel LEDs can be helpful when troubleshooting
problems.
Here is a table that helps explain each LED and LED combinations:
PWR on steady
The PWR LED indicates that the ISY has
power, either through the PLM or via a
separate AC adapter. If the PWR LED is
not lit, the ISY does not have power.
RX, TX and MEM off
If all three of these LEDs is off, the ISY is
idle.
RX blinking
The RX LED blinks when the ISY is
receiving INSTEON traffic.
TX blinking
The TX LED blinks when the ISY is
sending INSTEON traffic.
MEM blinking
The MEM LED blinks when the ISY is
accessing its internal memory.
RX on steady
If the RX LED is on steady, the ISY is
having a problem communicating with the
PLM. Unplug the PLM for 10 seconds,
then plug it back in to reboot. If the
problem continues, either the PLM or
cable is most likely defective.
ERR blinking
A blinking ERR LED indicates a file system
error. Please power off the ISY and try to
re-seat the SD card. If that does not help,
the SD card may be defective. Please see
Appendix C: Replacing / Upgrading
Your SD Card