ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0035 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
TROUBLESHOOTING PROCEDURES
UNIT TROUBLESHOOTING - TWPS CONTROL SYSTEMS
Table 1. PLC Processor and Power Supply Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
2
Power light is ON. All other
Failure of analog input slot card 11 or 12
If the POWER light is ON, the RUN light is
cont.
lights are OFF. Displays
to program.
OFF and the FLT (fault) light is blinking:
show zeros (continued).
1) Turn the Main Breaker to OFF and then
to ON. If the problem remains,
continue.
2) Insert the PLC Processor key. Toggle
from RUN to PROG and back to RUN.
3) If this clears the problem, return to
operation.
4) If this does not clear the problem, check
the STATUS LED light on each of the
analog input slot cards. If a light is
found to be OFF:
Remove the card from the chassis
and re-install to be sure proper
connection has been made (WP
If the STATUS LED light remains
off, replace the slot card.
Memory module failure.
If the POWER light is ON, the RUN light is
OFF and the FLT light is ON:
1) Turn the Main Breaker to OFF and then
to ON. If the problem remains,
continue.
2) Insert the PLC Processor key. Toggle
from RUN to PROG and back to RUN.
3) If this clears the problem, return to
operation. If the failure repeats,
continue.
4) Turn the power off. Remove the
memory module. Turn the power on. If
the FLT light now flashes, replace the
memory module (WP 0060).
5) If the FLT (fault) light does not flash,
replace the PLC Processor, the 13-Slot
Chassis power supply and the chassis
one at a time in sequence until the
failure is corrected (WP 0060).
0035 00-3
