ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0034 00
TROUBLESHOOTING PROCEDURES
UNIT TROUBLESHOOTING PROCEDURES TACTICAL WATER
PURIFICATION SYSTEM (TWPS)
Table 5. General MF System Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
4
MF Backwash Flow Low
Dirty MF Feed Strainer S-2.
Check and clean the strainer (WP 0040).
alarm comes on during
backwash (less than 190
MF Main Feed Valve V-111, Shell Lower
Conduct BIT (WP 0013). Be sure that
gpm).
Feed Valve V-113 or Shell Backwash
these valves cycle fully open. If not, refer to
Upper Outlet Valve V-401 fails to fully
Table 4.
Clean Strainer alarm comes
open.
on during backwash (less
than 210 gpm, but more than
Debris in the MF feed pump.
Remove the pump from the system and
190 gpm)
check for debris clogging the inlet or stuck
in the impeller.
Flow measurement loop failure.
See OCP and Instrument System
Malfunctions (WP 0035).
Worn MF feed pump impeller or wear ring.
Dissassemble pump, inspect and replace
the impeller and wear ring as indicated
5
MF TMP High Alarm is not
Pressure transmitter PT-101 or PT-102
See OCP and Instrument System
confirmed by operational
failure.
Malfunctions (WP 0035).
checks.
6
MF does not drain when the
Solenoid Valve XV-903 or PLC Slot 5
Step though the BIT test and verify that XV-
System Mode Switch is set to
output card failure.
903 operates. If it does not operate, refer
MF Drain.
to Table 4 Item 5.
System Mode Switch or PLC Slot 3 input
Open the OCP display panel to expose the
card failure.
sub-panel. Locate the Slot 3 card. Set the
mode switch to MF Drain.
1) If the channel 2 light is ON, replace
the Slot 3 input card (WP 0060).
2) If the channel 2 light is OFF, open the
wire way and check for 110 VAC
between terminal IN2 and ground. If
there is voltage, replace the Slot 3
input card (WP 0060).
3) If there is no voltage, replace the
System Mode Switch (WP 0059
Rotary Switch).
0034 00-19
