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Crestron Green Light
Problem Solving
16 • Crestron Green Light
®
Power Meter Control Unit
Troubleshooting
The following table provides corrective action for possible trouble situations. If
further assistance is required, please contact a Crestron customer service
representative.
GLS-EM-MCU Troubleshooting
TROUBLE
Device does not
function.
CT1 – CT3 LED is
flashing.
Loss of
functionality due
to electrostatic
discharge.
Reference Documents
The latest version of all documents mentioned within the guide can be obtained from
the Crestron Web site (www.crestron.com/manuals).
List of Related Reference Documents
DOCUMENT TITLE
GLS-EM-MCU Installation Guide
Further Inquiries
To locate specific information or to resolve questions after reviewing this guide,
contact Crestron's True Blue Support at 1-888-CRESTRON [1-888-273-7876] or
refer to the listing of Crestron worldwide offices on the Crestron Web site
(www.crestron.com/offices) for assistance within a particular geographic region.
To post a question about Crestron products, log onto the Online Help section of the
Crestron Web site (www.crestron.com/onlinehelp). First-time users must establish a
user account to fully benefit from all available features.
®
Power Meter Control Unit: GLS-EM-MCU
Crestron GLS-EM-MCU
POSSIBLE CAUSE(S)
Device is not
communicating with the
network.
Device is not powered
correctly.
GLS-EM-CT is
incorrectly wired.
GLS-EM-CT is
improperly installed.
Improper grounding.
Operations Guide – DOC. 7294B
CORRECTIVE ACTION
Use Crestron Toolbox to poll
the network. Verify network
connection to the device.
Check that voltage levels are
correct as measured from
each phase to neutral.
Ensure that black and white
wires are properly connected
to the BLK and WHT
terminals on the device.
Verify that device is facing the
proper direction. Ensure that
the THIS SIDE TOWARDS
SOURCE label faces the
source.
Check that all ground
connections have been made
properly.
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