Gasboy CFN Series Diagnostic Manual - Manual (Page 426)

CFN Islander
13-58 12/26/02
No console loop communications. All devices on console loop are down.
Possible Cause Checks Corrective Action
Islander is down. Check logger or do a PRint
DIagnostics command for
indication that the Islander
(site) is not running. Do a RUN 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 RS-
485 junction box (should be
located near the console) and
the other end is installed in
the SITE CONTROLLER
connector on the rear of the
console. If Profit Point, it
must be installed in either
modular connector on the
RS-485 to RS-232 converter
box. Install cable properly, if it is
incorrect.
Incorrect wiring between
Islander and console RS-485
junction box. Verify all field wiring (Islander
I Installation Manual –
C35520, Islander II
Installation Manual –
C35963). Make wiring connections, if
needed.
Defective RS-485 receiver IC
and Protected Driver Board. None. Replace U2 and U3 for
Islander I, U4 and U5 for
Islander II on the CPU Board.
When replacing U3 or U5,
replace the entire Protected
Driver Board (C05848), not
just the driver IC.
Verify that the RS-485
junction box is properly
grounded as shown in the
Islander Installation Manual.
Defective RS-485 junction
board. None. Replace the RS-485 junction
board.
Defective Islander CPU
board. None. Replace the CPU board.