ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
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TROUBLESHOOTING PROCEDURES
OPERATOR/CREW TROUBLESHOOTING PROCEDURES
Table 11. Chemical System Troubleshooting. Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
4
Low output or failure to pump
Incorrect stroke length.
Check zero on pump/re-zero pump.
against pressure.
Clogged foot valve screen.
Remove foot valve screen and clean.
Pump suction tube plugged or loose.
Check suction tube. If plugged, replace. If
loose, tighten.
Discharge tube or injection check valve
Check and clean as needed. Notify Unit
assembly plugged.
Maintenance to replace tube or clean or
replace the injection check valve assembly.
Plugged or defective four-function valve.
Notify Unit Maintenance to check the four
function valve and replace if necessary.
Worn chemical pump suction or discharge
Notify Unit Maintenance to replace suction
O-rings or cartridge valves
or discharge valve assemblies.
or
Ruptured pump diaphragm.
Notify Unit Maintenance to replace pump
diaphragm.
5
Bisulfite Pump CP-1 will not
Speed switch is in OFF position.
Set speed switch to 70%.
run with the selector switch
set to either ON or AUTO.
Electrical failure.
Notify Unit Maintenance.
6
Antiscalant Pump CP-2 or
Speed switch is in OFF position.
Set speed switch to 70%.
Hypochlorite Pump CP-3 will
not run with the selector
Electrical failure.
Notify Unit Maintenance.
switch to either ON or AUTO.
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