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 11. Chemical System Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
4
Low output or failure to pump
Worn chemical pump suction or discharge
Replace suction or discharge valve
against pressure.
O-rings or cartridge valves.
assembly (WP 0057).
Ruptured Liquifram diaphragm.
Replace Liquifram diaphragm (WP 0057).
Incorrect stroke length.
Increase stroke until the correct flow it
noted.
Clogged foot valve screen.
Remove foot valve screen and clean (WP
Pump suction tube plugged or loose
Check suction tube. If plugged, replace. If
loose, tighten.
Discharge tube or Injection check valve
Check discharge tube. If plugged, replace.
assembly plugged
Inspect check ball, seat, and O-ring. If
dirty, clean. Replace injection check valve
assembly if necessary. (WP 0057)
Plugged or defective four function valve
Remove four function valve and run pump.
If pump works satisfactorily, replace four
function valve (WP 0057).
5
Bisulfite Pump CP-1 will not
Speed switch is in OFF position.
Set speed switch to 70%.
run with selector switch in ON
position.
Failure of Bisulfite Pump selector switch or
Open OCP display panel to expose the
PLC Slot #2 Input card.
sub-panel (WP 0060). Check the Slot #2
LED lights. If channel 2 is not ON:
1) Open the Slot #2 wire-way cover.
Locate the IN2 terminal. Check for
AC 110-volts between IN2 and
ground.
2) If voltage is found, replace the Slot #2
Input card (WP 0060).
3) If voltage is not found, replace the
Bisulfite Pump selector switch
Failure of the PLC Slot #4 output card.
Continuing. If the Slot #2 Channel 2 light is
ON:
1) Open the slot #4 wire-way cover.
Locate the O6 terminal. Check for
AC 110-volts between O6 and
ground.
2) If voltage is not found, replace the
Slot #4 output card (WP 0060).
0034 00-37
