Lonworks Troubleshooting - Distech Controls ECL/ECB-PTU Series User Manual

CHAPTER 7
L W
ON ORKS
You can use this Troubleshooting Guide to help detect and correct issues that you may
encounter.
Table 32: Troubleshooting ECL Device Symptoms
Symptom Possible Cause
Device does not com- The device does not
municate on the L - have power / poor-
ON
W MS/TP quality power.
ORKS
network
Cut or broken wire.
The maximum num-
ber of devices on a
data bus segment has
been exceeded.
Absent or incorrect
supply voltage
Overloaded power
transformer (for 24V
controllers)
Network not wired
properly
Absent or incorrect
network termination
Too many Allure EC-
Smart-Vue sensors
are providing network
access
The STATUS LED is The device has auto-
blinking diagnosed a fault con-
dition
Controller is powered Fuse has blown (for
but does not turn on 24V controllers)
Network Guide
T
ROUBLESHOOTING
Solution
See Power Supply Requirements for 24V Controllers
Isolate the location of the break and pull a new cable.
Use a repeater to extend the BACnet data bus. See
1. Check if the device is showing the 'Poor Power Quality' status code (for 24V
controllers). See
2. Check power supply voltage between 24VAC/DC ±15% and 24V COM pins
and ensure that it is within acceptable limits (for 24V controllers).
3. Check for tripped fuse or circuit breaker.
1. Check if the device is showing the 'Poor Power Quality' status code. See
35 for a list of fault codes.
2. Verify that the transformer used is powerful enough to supply all controllers.
See Transformer Selection and Determining the Maximum Power Run Length
page 61.
Double check that the wire connections are correct.
Check the network termination(s).
Disable the Net to Subnet Port Settings jumpers on all controllers. If communica-
tions are re-established, re-enable only a few Allure EC-Smart-Vue sensors to
have network access.
See Table 33 for a list of fault codes.
Disconnect the power. Check the fuse integrity. Reconnect the power.
Table 35 for a list of fault codes.

LonWorks Troubleshooting

on page 61.
Network Cables on page 55.
Table
on
115