APPENDIX D: TROUBLESHOOTING
139
CUSTOMER SUPPORT: 978-486-3711 • [email protected] • www.burk.com
My dial-up modem connection is
unreliable.
One or both of the power LEDs on
the Command Relay is off, even
though the I/O or VRC2500 unit is
powered.
No commands are being issued and
the Remote/Local LED on the
GSC3000 I/O or VRC2500 is solid
red.
No commands are being issued and
the Remote/Local LED on my
GSC3000 I/Os and the Voice
Interface’s Remote/Local LED is
flashing red.
The Remote/Local LED on my unit
is off.
I can't upload firmware to my
GSC3000 I/O unit or I can't
change the unit number.
Radio Frequency Interference is
inhibiting communications.
The Command Relay is not
securely connected to the remote
control unit.
A fuse may have blown.
The unit is in Local mode, which
disables commands for equipment
maintenance purposes.
The unit is in local mode.
The firmware needs to be cleared
and reloaded.
You are not connected to COM2
on the I/O unit.
You are not using the correct cable
to make your connection.
Install an RFI filter for the modem
at the remote site. Refer to Chapter
6 for full-time modem
configuration.
Check and tighten the DB37
connection.
The Command Relay is protected
by fuses that automatically reset
about 30 seconds after the
overload load has been removed.
Unplug the DB37 connector,
deactivate any command outputs,
and reconnect the cable after 30
seconds. If both LEDS still do not
light, contact Burk Technology
customer support.
Press the Remote/Local button to
return the unit to Remote mode.
Find the I/O unit with the solid red
Remote/Local LED and press the
Remote/Local button on that unit
to return all networked units to
Remote mode.
For an I/O unit, engage the JP9
jumper (see Appendix A) and
power cycle the unit. Remove the
jumper and proceed with the
firmware upload process. For a
Voice Interface, the jumper is at
JP1.
Connect to COM2 on the rear
panel of the I/O unit.
Use the supplied null modem cable.
If this happens....
It could be that...
Try this...
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