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.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
1
Backwash does not initiate.
Failure to push MF Backwash Start button
Follow procedures (WP 0014).
during startup procedures.
Failure of MF Backwash Start button or
Open OCP display panel to expose the
PLC Slot #2 Input card.
sub-panel (WP 0060). Set Main CB to ON.
Push and hold Backwash start. Check the
Slot #2 LED lights. If channel 4 is not ON:
1) Open the Slot #2 wire-way cover.
Locate the IN4 terminal. Check for
AC 110-volts between IN4 and
ground while pushing and holding the
start button.
2) If voltage is found, replace the Slot #2
Input card (WP 0060).
3) If voltage is not found, replace the MF
Backwash Start button (WP 0059).
2
RO Feed Tank Level Low
Leaking or clogged air tubing at Feed
Check tubing connections. Disconnect
alarm with RO Feed Tank
Flow Control Panel.
tubing with V-909 closed. Open V-909 to
Level display reading
verify air flow. Close V-909 and reconnect
correctly. Operator has
tubing.
performed corrective actions
Inadequate air pressure to Feed Flow
Check pressure gauge PI-902 for 100 psig.
in WP 16 and WP 33 and
system is operable in manual
Control Panel.
Adjust PRV-901 to provide a 100 psig
mode. System passes BIT
reading at PI-902 (WP 42).
test and there are no
Backwash Flow Low alarms.
V-202 actuator, positioner or I/P
Troubleshoot according to table 4, item 4.
transmitter failure.
Mechanical problem with internals of V-
Remove valve from piping and inspect liner
202.
and disc for wear (WP 66).
Mechanical problem with internals of V-
Remove valve from piping and inspect liner
201.
and disc for wear (WP 66).
Feed TDS not properly set or functioning.
Have operator set correct TDS. If TDS
cannot be set, troubleshoot according to
WP 35, table 2, item 5. 4 -20mA
corresponds to a 0-100,000 mg/liter range.
Temperature transmitter not operating
Refer to table 7, item 8. 4-20 mA
correctly.
corresponds to a 0-250 degree F range.
3
RO Feed Tank % Level reads
Level measurement loop failure.
See OCP and Instrument System
0 with level in the tank, reads
Malfunctions (WP 0035).
a level other than actual by
observation, or the reading
changes up and down
rapidly.
0034 00-18
