TROUBLE
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
The output does not appear
to dim below 50%.
The dimmer channel may
have been damaged.
Contact Crestron
customer service.
The connected LED load
buzzes and flickers when
dimmed.
An incompatible LED
fixture is installed.
Verify the connected LED
load is dimmable and has
been tested. Refer to
Crestron’s Light Fixture
Compatibility Listing at
www.crestron.com/
resources/lighting-fixture-
compatibility.
An incorrect dimming
phase is selected.
Set the dimming phase to
Auto or Reverse Phase
mode to reduce current
spikes to load.
The connected LED load
flickers or turns off when
dimmed to a low level.
The minimum dimming
level is set too low.
Adjust the minimum
dimming level to match
the minimum level
required by the LED load.
The LED load does not dim
to a low brightness level.
An incorrect dimming
phase is selected.
Set the dimming phase to
Forward Phase mode.
As of the date of manufacture, these products have been tested and found to comply with
specifications for CE marking.
The product warranty can be found at www.crestron.com/warranty.
The specific patents that cover Crestron products are listed at patents.crestron.com.
Certain Crestron products contain open source software. For specific information, please visit
www.crestron.com/opensource.
Crestron, the Crestron logo, Cresnet, and Crestron Toolbox are either trademarks or registered
trademarks of Crestron Electronics, Inc. in the United States and/or other countries. UL is either a
trademarks or registered trademarks of Underwriters Laboratories, Inc. in the United States and/or
other countries. Other trademarks, registered trademarks, and trade names may be used in this
document to refer to either the entities claiming the marks and names or their products.
Crestron Electronics, Inc.
Installation Guide - DOC. 7851B
15 Volvo Drive Rockleigh, NJ 07647
(2047970)
Tel: 888.CRESTRON
01.17
Fax: 201.767.7576
Specifications subject to
www.crestron.com
change without notice.
Crestron disclaims any proprietary interest in the marks and names of others. Crestron is not responsible
for errors in typography or photography.
This document was written by the Technical Publications department at Crestron.
©2017 Crestron Electronics, Inc.
Wiring the Terminal Block to the Feed and Load(s) (Right-Side Double-Wide Enclosures)
LINE 1
Connection from a
15 or 20 A circuit
breaker
Bypass
jumpers
Terminal
block
To loads
Right-side
wiring label
LINE 2
Connection from a
15 or 20 A circuit
breaker
Ground
bus
Module
location
label
NEUTRAL
NEUTRAL
GND
CLX-2DIMU8
DIM 8
DIM 7
DIM 6
DIM 5
2 FEED
8 DIM
120VAC 60 Hz
SINGLE PHASE
16A MAX/FEED
N OUT 8
N OUT 7
N OUT 6
N OUT 5
N IN 2
DIM 5
LINE 2
DIM 4
DIM 3
DIM 2
DIM 1
LINE 1
N OUT 4
N OUT 3
N OUT 2
N OUT 1
N IN 1
Module interconnect
cable attached
Connection not
made
Controlling Local Loads and Setting Load Type
Use Local mode to verify that each load is connected to the proper output on the modules.
Refer to the illustration that follows for button locations.
1. Press the
SETUP
button to enter Local mode. Output 1 turns full on.
2. Press the mode button to cycle through the dimming modes, and press the
SETUP
button to save the setting and advance to the next output. The dimming mode is
identified by the blinking LED.
● Green indicates forced reverse phase.
● Red indicates forced forward phase.
● Yellow and green indicate auto-select reverse phase.
● Yellow and red indicate auto-select forward phase.
● Red and green indicate non-dim.
3. Press the
SETUP
button to advance to output 2. Repeat step 2 for the remaining
outputs.
4. After turning on the last output, press the
SETUP
button again to turn on all outputs
and verify that they are operating correctly.
5. Press the
SETUP
button to turn off all outputs and LEDs and exit Local mode.
NOTE
: Adjustment to the dimming mode locally is disabled if the dimming phase is
set in the SIMPL program.
CLXI-2DIMU8 Mode and SETUP Button Locations
Setup button
Mode button
Brown from breaker
Brown from breaker
Blue from panel or
breaker
Red to loads
Red to loads
Blue to loads
Blue to loads
CLX-2DIMU8
DIM 1
DIM 2
DIM 3
DIM 4
DIM 5
DIM 6
DIM 7
DIM 8
N IN 1
N OUT 1
N OUT 2
N OUT 3
N OUT 4
N IN 2
N OUT 5
N OUT 6
N OUT 7
N OUT 8
LINE 1
LINE 2
2 FEED
8 DIM
120VAC 60 Hz
SINGLE PHASE
16A MAX/FEED
Blue from panel or
breaker
Brown from breaker
Brown from breaker
Blue from panel or
breaker
Red to loads
Red to loads
Blue to loads
Blue to loads
Blue from panel or
breaker
CLX-2DIMU8
DIM 8
DIM 7
DIM 6
DIM 5
2 FEED
8 DIM
120VAC 60 Hz
SINGLE PHASE
16A MAX/FEED
N OUT 8
N OUT 7
N OUT 6
N OUT 5
N IN 2
DIM 5
LINE 2
DIM 4
DIM 3
DIM 2
DIM 1
LINE 1
N OUT 4
N OUT 3
N OUT 2
N OUT 1
N IN 1
Jumper removed
Jumper installed
Jumper removed
Jumper installed
CLX-2DIMU8
DIM 8
DIM 7
DIM 6
DIM 5
2 FEED
8 DIM
120VAC 60 Hz
SINGLE PHASE
16A MAX/FEED
N OUT 8
N OUT 7
N OUT 6
N OUT 5
N IN 2
DIM 5
LINE 2
DIM 4
DIM 3
DIM 2
DIM 1
LINE 1
N OUT 4
N OUT 3
N OUT 2
N OUT 1
N IN 1
Jumper removed
Jumper installed
Jumper removed
Jumper installed
CLX-2DIMU8
DIM 1
DIM 2
DIM 3
DIM 4
DIM 5
DIM 6
DIM 7
DIM 8
N IN 1
N OUT 1
N OUT 2
N OUT 3
N OUT 4
N IN 2
N OUT 5
N OUT 6
N OUT 7
N OUT 8
LINE 1
LINE 2
2 FEED
8 DIM
120VAC 60 Hz
SINGLE PHASE
16A MAX/FEED
Troubleshooting
The following table provides corrective actions for possible trouble situations. If further
assistance is required, please contact a Crestron customer service representative.
The module displays error codes using the dimmer output LEDs. The LED blinks a pattern,
such as 1-2 or 2-4, to indicate the error on that output. For example, a 1-2 error blinks the
LED 1 time, pauses for 1 second, blinks two times, pauses for two seconds, and then
repeats until the error is corrected. A 2-4 error blinks the LED blinks two times, pauses for
1 second, blinks four times, pauses for two seconds, and then repeats until the error is
corrected. Refer to the following table for possible corrections.
5. Turn on the circuit breakers and verify that the green PWR LED on the module lights,
the breakers do not trip, and the power is delivered to the loads.
6. Turn off the circuit breakers.
NOTE
: Before removing the bypass jumpers, make sure to properly connect and
program the control system that provides functionality to the system.
7. Remove the bypass jumpers on the brown and red sections of the terminal block.
The jumpers on the blue sections of the terminal block must remain installed.
Module Installation and Wiring
CAUTION
: The module contains electrostatic sensitive devices (ESDs); the unit must be
handled from the metal chassis. Do not touch the PC board or components.
NOTE
: Install the modules after the enclosure has been completely wired. Refer to
“Terminal Block Installation and Field Wiring” for details.
Install and wire the module.
1. Turn off the circuit breakers.
2. Use the four supplied self-tapping Phillips pan head screws (8B x 1/4 in length) to
secure the module to the enclosure.
3. Connect the wires from the module to the terminal block. Each wire exits the module
directly in line with, and is the same color as, the terminal to which it should be
connected. Wires are prestripped to 12 mm (1/2 in). Tighten to 1 Nm.
4. If the module is being installed above another module within the enclosure, attach
the supplied module interconnect cable between the two modules. The illustration
that follows shows the area within a double-wide enclosure where the corners of
four modules meet.
NOTE
: One wire on the module interconnect cable may be a different color from
the rest. The color has no bearing on its orientation during installation.
Using Module Interconnect Cable to Wire One Module to Another
Wiring the Terminal Block to the Module (Single-Wide and Left-Side Double-Wide Enclosures)
Removing the Line Jumpers after Testing (Single-Wide and Left-Side Double-Wide Enclosures
and Right-Side Mounted CLTI-2DIMU8 Shown)
Wiring the Terminal Block to the Module (Right-Side Double-Wide Enclosures)
8. Turn on the circuit breakers.
NOTE
: Power must be supplied to LINE 1 for the module to communicate with the
control system or for any of the circuits to operate.
9. If the program is not yet running, test the loads using Local mode.
ERROR
CODE
ERROR NAME
FAULT DESCRIPTION
1-1
Master MCU
Stuck in
Bootloader
The firmware upgrade has failed or has been aborted,
leaving the master processor in bootloader. Reinitiate
firmware upgrade from Crestron Toolbox software.
1-2
Dimming
Processor
Unresponsive
Communications to the corresponding dimming
processor have failed. Confirm that power is supplied
to LINE 2/N IN 2. Then reboot the unit or contact
Crestron customer service.
1-3
Dimming
Processor
Firmware
Upgrade Failed
The firmware upgrade has failed or has been aborted,
leaving the dimming processor in bootloader.
Reinitiate the firmware upgrade from Crestron
Toolbox.
2-1
Overcurrent
Tripped
A short circuit or overload has been detected and
output has been switched off.
•
Check wiring for shorts.
•
Verify that the total load connected to the
channel is less than 2.5 A.
•
Verify that the dimming phase has not been set
to Forward Phase mode if an incandescent or
electronic load is connected.
The channel attempts to resume normal operation
after receiving another command to turn on.
2-2
Shorted FET
The dimmer channel has failed. Disconnect the load
and contact Crestron Technical Support.
2-3
Overtemperature
Tripped
The dimming channel has overheated and shut down
due to excessive load.
•
Verify that the total load connected to the
channel is less than 2.5 A.
•
Verify that the panel ventilation is not blocked.
The channel resumes normal operation after cooling.
2-4
Overvoltage
Detected
High-voltage spikes have been detected and output
has been shut down.
If a magnetic load is connected, verify that the
dimming phase has been set to Forward Phase
mode.
3-1
Zero Cross Fault
The dimmer is unable to lock onto the ac line.
If the unit is powered by a generator, verify that
generator output is 50/60 Hz and stable.