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CRESTRON GREEN LIGHT™ Architectural Dimming
Problem Solving
Troubleshooting
The following table provides corrective action for possible trouble situations. If further assistance is required, please
contact a Crestron customer service representative.
Troubleshooting
TROUBLE POSSIBLE CAUSE(S) CORRECTIVE ACTION
Power not delivered to the
module.
If the module is powered internally, verify that
the circuit breaker connected to the first
channel on the module is on and delivering
power to the module.
If module is powered externally, verify that the
POWER port is correctly wired and receiving
power.
Module(s) does not
function.
System commissioning not
complete.
Arrange for system commissioning.
Module’s PWR LED is
flashing.
AC power not present on L1.
Check that the branch breaker feeding L1 has
not tripped. Note that unit will continue to
function, but will draw power from the backup
Cresnet power supply.
Unit cannot be taken out of
Override mode
Short (contact closure) exists
between G and OVR terminals
on any of the OVERRIDE
terminals present at bottom of
the cabinet.
Determine the reason for the short. Remove or
remedy the short (e.g. GLS-PLS-120/277 phase-
loss sensor may not have been installed
properly, or actual phase-loss has been
detected).
Mode switch is set to
NON-DIM.
Set switch to DIM.
Load does not dim.
Module is not wired correctly. Verify that module is wired for dimming.
Fluorescent lamps stay at
minimum intensity (0-10V
dimmable fluorescents only).
+ or - wires are reversed or
shorted.
Verify polarity of + and - wires at ballasts and
GLXP-DIMFLV8.
Fluorescent lamps stay at
maximum intensity (0-10V
dimmable fluorescents only).
+ or - wires are not connected.
Verify polarity of + and - wires at ballasts and
GLXP-DIMFLV8.
Further Inquiries
If you cannot locate specific information or have questions after reviewing this guide, please take advantage of
Crestron's award winning customer service team by calling Crestron at 1-888-CRESTRON [1-888-273-7876].
You can also log onto the online help section of the Crestron website (
www.crestron.com/onlinehelp) to ask
questions about Crestron products. First-time users will need to establish a user account to fully benefit from all
available features.
Installation Guide – DOC. 6688A CRESTRON GREEN LIGHT Architectural Dimming • 13