Honeywell XL 800 SERIES Manual Do Utilizador
Excel 800
EN1B-0410GE51 R0908A
34
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.
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.
– 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.
– 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
Table 42. Power LED of I/O modules
case
power LED
meaning
remedy
1 ON
I/O module is powered
No action necessary
2 OFF
No power
►
Check power supply
3 Flashing
continuously
If the I/O module’s service LED is likewise
flashing, the I/O module is in the boot mode
flashing, the I/O module is in the boot mode
►
Wait until rebooting (firmware
download) has been completed
download) has been completed