Product Guide VESDA ECO Detector by Xtralis
60 Troubleshooting 17898_05
Troubleshooting
When using the ECO detector, the user may find a problem with the installation or configuration which causes the product to
act in a way that the user is not expecting. Below is a list of common problems, with solutions, which may help the user to
achieve the maximum benefit in using the ECO detector product.
Fault Condition Possible Explanations and Corrective Actions
Green Power Indicator not lit Check power connections
Green Indicator Flashing This is an indication that communications between the product and a connected
device are occurring
Yellow Indicator Lit There is a Major Fault condition present. Review using Xtralis VSC. See below
Yellow Indicator Flashing There is a Minor Fault condition present. Review using Xtralis VSC. See below
No Communications via
RS485/Modbus
a. Check correct connection polarity - ensure that D0 (A) and D1 (B) are connected
correctly at each end.
b. Ensure that there is a 0V connection present between the ECO and the RS485
driver (contrary to some popular belief, a 0V reference between the two is
required)
c. Ensure that correct termination resistors are fitted in the correct positions ( one at
each end of the bus), refer to page 15 for details
d. Ensure that the maximum number of devices on the bus has not been exceeded
(again refer to page 15 for details)
e. Ensure that the correct cable type has been used.
f. Ensure that the maximum cable length has not been exceeded.
g. Check using Xtralis VSC via the USB port that the settings of the Modbus
interface are correct (Address, Baudrate etc)
The connection to the USB port
is not working
Ensure that you have installed the necessary USB drivers as detailed in Appendix C
on page 87. Try using an alternate USB port on your PC.
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