I/O Modules Troubleshooting; Power Led Of I/O Modules - Honeywell XL 800 Series Installation And Commissioning Instructions

I/O Modules Troubleshooting

Check if the power supply voltage level is OK and that there is no high voltage (> 24 VAC or > 40 VDC) connected to the
►
inputs/outputs of the XF821AU, XFL821AU, XF822AU, XFL822AU, XFR822AU, XFLR822AU, XF823AU, and XFL823AU I/O
modules.
Replace the problem I/O module with another module of the same kind.
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– If the problem persists, this is an indication that the problem is caused by the application or incorrect wiring.
– If the problem is solved, this is an indication that the I/O module was defective.
For troubleshooting purposes on all I/O modules the following features can be used:
•
Power LED
•
Service LED
•
Service button
In addition, a module-specific troubleshooting may be necessary.

Power LED of I/O Modules

case power LED
1 ON
2 OFF
3 Flashing continuously
EN1B-0410GE51 R0908A
Table 42. Power LED of I/O modules
meaning
I/O module is powered
No power
If the I/O module's service LED is likewise
flashing, the I/O module is in the boot mode
No action necessary
Check power supply
►
Wait until rebooting (firmware
►
download) has been completed
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Excel 800
remedy