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Crestron PAC2 Professional Automation Computer
Problem Solving
Problems may occur with the 2-Series automation control system itself or there may
be serial communication difficulties with other devices connected to the control
system. The next two sections address possible problem solving tools or procedures
for each situation.
Possible Problems with the Control System
Troubleshooting the Control System
The following table provides corrective action for possible trouble situations. If
further assistance is required, please contact a Crestron customer service
representative.
2-Series Integrated Dual Bus Control System Troubleshooting
TROUBLE
POSSIBLE
CAUSE(S)
CORRECTIVE ACTION
Unexpected
response from
control system.
Network devices are not
communicating to the
control system.
From the Viewport, poll the network (F4) to
verify communication. If all devices respond,
use Network Analyzer to check quality of
connections and network.
PWR LED does
not illuminate.
Control system is not
receiving power.
Verify that supplied power cord is properly
attached to control system and the other end is
securely plugged into an outlet.
ERR LED
illuminates.
Hardware or software
failure, hardware
incompatibility with
software definitions,
programming error, or
system message.
Verify that hardware configuration matches
software configuration (i.e., card is in proper
slot as defined by program). Use Viewport to
display the error log.
Compilation error
RLCMCVT166 &
RLCMCVT177.
Poor analog versus serial
signal definition in the
SIMPL Windows program.
Confirm proper signal definition in the program.
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" for more
details. Refer also to the "Troubleshooting Non-
Functioning Units" procedures following this
table.
A/V system device
does not respond.
Serial port not placed
properly.
Verify serial cables are tightened.
Used wrong serial port. Verify that proper serial port is defined.
Serial cable miswired. Verify that serial cable is wired correctly for RS-
232, 422, 485.
Troubleshooting Non-Functioning Units
Perform the following procedure to correct system lock-up problems that are not
resolved via the procedures in “Setting Network IDs in D3 Pro” on page 21.
1. Connect a DB9 straight-through RS-232 cable between the PAC2 and a
PC. Refer to “Establishing Communication with the PAC2” on page 19
for more information.
Operations Guide – Doc. 5941 Professional Automation Computer: PAC2 • 37