Gasboy CFN Series Diagnostic Manual - Manual (Page 363)

Site Controller III
1116 12-29
No console loop communications. All devices on console loop are down.
Possible Cause Checks Corrective Action
Site Controller is down. Check logger or do a PRint
DIagnostics command for
indication that the site is not
running. Do a RUN or RUN;I command
if site is down.
RS-485 phone cable is loose
or not installed correctly. Check that one end of the
cable is installed in the loop 3
connector on the rear of the
site controller and the other
end is installed in the SITE
CONTROLLER connector on
the rear of the console, or into
the console junction box or
RS232-RS485 converter (if
used). Check all cables (both
ends) from converter to make
sure they are connected. Install cable properly, if it is
incorrect.
Incorrect wiring between
junction boxes (used only
when console is located more
than eight feet from site
controller). Verify all field wiring with the
SC III Installation Manual
(C35880). Make wiring connections, if
needed.
Console CPU not configured
correctly. Check console #7 set up. Correct, if necessary.
Defective Site board set. None. Replace Site board set.
Defective console CPU board
or RS232-RS485 converter (if
used). None. Replace the console CPU
board or RS232-RS485
converter (if used).
If used, defective RS232-
RS485 converter power
supply. Measure the output of the
power supply from the center
of the connector at the
converter to the outside of the
connector. The output should
be +10 to +16.5 volts. Replace if bad.
Defective RS-485 junction
board (if used). None. Replace the RS-485 junction
board.
Bad RS-485 cable. None. Replace bad cable.