Crestron MC3 3-Series Control System™
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.
MC3 Troubleshooting
TROUBLE POSSIBLE CAUSE(S) CORRECTIVE ACTION
Device does not
function.
Device is not
communicating with the
network.
Use Crestron Toolbox to poll
the network. Verify network
connection to the device.
Device is not receiving
power from a Crestron
power source.
Use the provided Crestron
power source. Verify
connections.
Device is not receiving
sufficient power.
Use the Crestron Power
Calculator to help calculate
how much power is needed
for the system.
PWR LED does
not illuminate.
Device is not receiving
power.
Verify power supply
connection.
NET LED does
not illuminate.
Device not wired
correctly.
Verify Cresnet wiring.
System locks up. Various.
Hold down SW-R button on
control system front panel to
bypass program and
communicate directly with
processor. Refer to
“Troubleshooting
Communications” in the
Crestron 3-Series Control
System Reference Guide for
more details.
Device not wired
correctly.
Verify Cresnet wiring.
Cresnet device
does not respond.
Improper Net ID used.
Verify that device ID matches
Net ID in the program.
IRP2 or serial port not
placed properly.
Verify placement of IRP2
(hold phosphor card under
IRP2 while pressing button)
and tighten the serial cables.
Wrong IR/Serial port
used.
Verify that proper IR/Serial
port is defined.
AV system
device does not
respond
Serial cable not wired
correctly.
Verify that serial cable is
wired correctly for RS-232,
422 or 485.
Loss of
functionality due
to electrostatic
discharge.
Improper grounding.
Check that all ground
connections have been made
properly.
Operations Guide – DOC. 7095D 3-Series Control System™: MC3 • 35