TROUBLESHOOTING
GENERAL FAILURES
I-E96-117B
5 - 13
Figure 5-8. Troubleshooting Flowchart for General Operational Failures
ALL LEDs
OFF?
N O
Y ES
ERROR CODE E20 ON
ALPHANUMERIC DISPLAY
N O
Y ES
PLACE MANUAL
OVERRIDE SWITCH
IN THE -A-
POSITION
CHECK STATIO N
AND TERMINATION
UNIT FUSES
CHECK ALL POW ER
AND CABLE
CO NNECTIO NS
CHECK 24 VDC ON
E1 OF TERM INATION
UNIT
POWER
ON TERM INATIO N
UNIT?
SECURE CONTROL
OF PRO CESS
THROUG H
ANOTHER SO URCE
REPLACE THE
STATION
YELLOW
MANUAL LED
REMAINS
ON?
STATION
WILL NOT EXIT
BYPASS?
SECURE CONTROL
O F PROCESS
THROUGH
ANOTHER SOURCE
REPAIR O PEN
PRO CESS LOOP
RESET THE
STATION
DONE
NO
NO
BARG RAPHS
FLICKER O R
DIM?
REPLACE STATION
NO
YE S
YE S
YE S
NOT
ALL LEDs
ILLUMINATE?
NO
Y ES
REPLACE THE
STATION
DONE
CHECK DC
POWER BUS
NO
Y ES
CHECK VOLTAGE O N
PIN 2 ON THE STATIO N
END O F THE
STATIO N CABLE
POWER
ON DC POWER
BUS?
NO
Y ES
FAULTY MODULAR
POWER SYSTEM:
TROUBLESHO OT
POWER SYSTEM
REPLACE WIRING
FROM DC POWER BUS
TO TERMINATION UNIT
REPLACE CABLE
POWER
OK ON STATION
CABLE?
REPLACE THE
STATION
Y ES
NO
DONE
MANUAL
OVERRIDE SWITCH
IN -A- POSITION?
T00312A