ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0033 00
TROUBLESHOOTING PROCEDURES
OPERATOR/CREW TROUBLESHOOTING PROCEDURES
Table 5. General MF System Troubleshooting.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
1
Backwash does not initiate.
Failure to push Backwash Start during
Follow procedures (WP 0014).
startup procedures.
Failure of MF Backwash Start button or
Notify Unit Maintenance.
PLC Slot #2 Input card.
2
RO Feed Tank % Level reads
Level measurement loop failure.
Continue operation with manual flow
0 with level in the tank, reads
control. Notify Unit Maintenance.
a level other than actual by
observation, or the reading
changes up and down
rapidly.
3
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, notify
Upper Outlet Valve V-401 fails to fully
Unit maintenance.
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.
Resume operation. Note the backwash
flow. If it is less than 175 gpm, the flow
measurement loop may have failed.
Continue operation. Notify Unit
Maintenance.
Worn MF feed pump impeller or wear ring.
If the backwash flow is less than 210 gpm,
but not less than 190 gpm, the MF feed
pump may be worn. Continue operation.
Notify Unit Maintenance.
4
MF TMP High Alarm.
Pressure Transmitter PT-102 failure.
Compare TMP with Operating Data Log
entries. If it is much higher than previous
entries, PT-101 or 102 may have failed.
Compare the difference between pressure
gauges PI-101 and PI-102 with the TMP
display. If the pressure gauges show a
lower TMP, this also confirms PT-101 or
102 failure. Continue operation. Notify Unit
Maintenance.
MF TMP Zero out of adjustment.
Check TMP for zero at next PMCS
shutdown.
MF fouled and ready for routine cleaning.
Schedule routine cleaning within 40 hours.
0033 00-13
