Troubleshooting Guide - Distech Controls ECL-VAV Series Hardware Installation Manual

Troubleshooting Guide

Controller is powered but does not turn on
Fuse has blown
Power supply polarity
Controller cannot communicate on the L
Absent or incorrect supply voltage
Overloaded power transformer
Network not wired properly
Absent or incorrect network termination
Too many Allure EC-Smart-Vue Sensors are
providing network access
Controller communicates well over a short network, but does not communicate on large network
Network length
Wire type
Network wiring problem
Absent or incorrect network termination
Extra capacitance
Number of controllers on network segment
exceeded
Network traffic
Hardware input is not reading the correct value
Input wiring problem
Open circuit or short circuit
Configuration problem
Over-voltage or over-current at an input
Hardware output is not operating correctly
Fuse has blown (auto-reset fuse)
Output wiring problem
Configuration problem
0-10V output, 24VAC powered actuator is not
moving.
Wireless devices not working correctly
Device not associated to controller
Power discharge
Device too far from the Wireless Receiver
Configuration problem
Flow sensor is not giving proper readings
Tubing connection problem
Controller is not calibrated properly
Damper is not opening or closing properly
Mechanical stops not in proper position
Controller in Override
Rx/Tx LEDs
RX LED not blinking
TX LED not blinking
10/12
Disconnect the power. Check the fuse integrity. Reconnect the power.
Verify that consistent polarity is maintained between all controllers and the transformer. Ensure that the 24VCOM terminal
of each controller is connected to the same terminal on the secondary side of the transformer. See
W network
ON ORKS
1. Check power supply voltage between 24VAC ±15% and 24VCOM pins and ensure that it is within acceptable limits.
2. Check for tripped fuse or circuit breaker.
Verify that the transformer used is powerful enough to supply all controllers.
Double check that the wire connections are correct.
Check the network termination(s).
Disable the Net to Subnet Port Settings jumpers on all controllers (for jumper location, see Figure 9). If communications
are re-established, re-enable only a few Allure EC-Smart-Vue sensors to have network access.
Check that the total wire length does not exceed the specifications of the Junction Box and Wiring Guideline for Twisted
Pair L W Networks.
ON ORKS
Check that the wire type agrees with the specification of the Junction Box and Wiring Guideline for Twisted Pair
L W Networks.
ON ORKS
Double check that the wire connections are correct.
Check the network termination(s). Incorrect or broken termination(s) will make the communication integrity dependent
upon a controller's position on the network.
Make sure that no extra capacitance is being connected to the network other than the standard FTT circuit and a
maximum of a 3 meter stub (in bus topology).
The number of controllers on a channel should never exceed 64. Use a router or a repeater in accordance to the Junction
Box and Wiring Guideline for Twisted Pair L
Query node statistics to check for errors.
Use a L W protocol analyzer to check network traffic.
ON ORKS
Check that the wiring is correct according to this manual and according to the peripheral device's manufacturer.
Using a voltmeter, check the voltage on the input terminal. For example, for a digital input, a short circuit shows
approximately 0V DC and an open circuit shows approximately 5V DC.
Using EC-gfxProgram, check the configuration of the input. Refer to the controller's user guide for more information.
An over-voltage or over-current at one input can affect the reading of other inputs. Respect the allowed voltage / current
range limits of all inputs. Consult the appropriate datasheet for the input range limits of this controller.
Disconnect the power and outputs terminals. Then wait a few seconds to allow the auto-reset fuse to cool down. Check
the power supply and the output wiring. Reconnect the power.
Check that the wiring is correct according to this manual and according to the peripheral device's manufacturer.
Using the controller configuration plug-in or wizard, check the configuration of the output. Refer to the controller's user
guide for more information.
Check the polarity of the 24VAC power supply connected to the actuator while connected to the controller. Reverse the
24VAC wire if necessary. Check the jumper settings for the external power supply as shown in
Using EC-gfxProgram, check the configuration of the input. Refer to the device's user guide for more information.
1. Recharge device with light (if solar-powered) or replace battery (if battery-powered),
2. Ensure sufficient light intensity (200lx for 4 hours/day).
Reposition the device to be within the range of the Wireless Receiver. For information on typical transmission ranges,
refer to the Open-to-Wireless Solution Guide.
Using the device configuration plug-in or wizard, check the configuration of the input. Refer to the Wireless Battery-less
Sensors and Switches Solutions Guide for more information.
1. Make sure that the tubing is installed properly and that the tubing is not bent.
2. Verify that the high and low pressure sensors are not inversed.
Recalibrate the controller. Refer to the controller's user guide for more information.
The two mechanical stops must be positioned to stop the damper motion when it is completely closed and completely
opened. The mechanical stops can be moved by increments of 5°.
Set the Override to OFF in the wizard.
Data is not being received from the L
Data is not being transmitted onto the L
W Networks .
ON ORKS
W data bus.
ON ORKS
W data bus.
ON ORKS
Figure 8.
Table 3.