Issues & Troubleshooting - Universal Devices ISY-994i User Manual

23 Issues & Troubleshooting
23.1 Front and Rear Panel LEDs
Front Panel LEDs: Understanding the ISY's front panel (see below) LEDs can be helpful
when troubleshooting problems.
Here is a table that helps explain each LED and LED combinations:
LED or Combination Indicated Status
Power on steady
RX, TX and Memory off If all three of these LEDs are off, the ISY is idle.
RX blinking
TX blinking
Memory blinking
RX on steady
Error blinking
Memory and Error
blinking
Figure 393: ISY Front Panel
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.
The RX LED blinks when the ISY is receiving INSTEON traffic.
The TX LED blinks when the ISY is sending INSTEON traffic.
The MEM LED blinks when the ISY is accessing its internal memory.
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.
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 23.11
If both the MEM and ERR LEDs are blinking, the ISY is unable to
communicate with your Ethernet network. Please check all cable
connections, try rebooting your router or switch, and ensure that
you have a DHCP server available.
Upgrading Your SD Card
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