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 7. General RO System Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
6
RO Feed Pressure Low alarm
Pressure gage PI-202 drops below 35
cont.
(during normal operation) and
psig.
HP Pumps stop automatically
(or will not start). RO Feed
1) In-line Strainer S-4 plugged.
1) Remove and inspect In-line strainer S-4.
Pump remains on
Clean if dirty
(continued).
2) RO Feed Tank Strainer S-3 plugged.
2) Remove / inspect RO Feed Tank
Strainer S-3. Clean if dirty (WP 0041)
3) RO feed pump impeller and/or wear
3) Notify Unit Maintenance.
ring are worn or corroded.
7
Cleaning solution does not
CB201 or CB204 Circuit Breaker Tripped.
Open PDP and check circuit breakers
heat up with heater switch set
CB201 and CB204 (WP 0011). Reset as
to AUTO 2.
needed. If it trips again, notify Unit
Or
Maintenance to check for shorts.
The solution does not heat up
Tank Heater Switch or PLC slot 1 Input
Notify Unit Maintenance.
at least 30 degrees in 30
card failure.
minutes with the heater
switch in AUTO 2.
Failure of PLC Slot #4 Output card or
Notify Unit Maintenance.
failure of the heater contactor actuating
coil failure.
Broken heating element(s).
Notify Unit Maintenance.
8
Heaters do not turn off when
Temperature transmitter TT-201 or
Continue operation by manually setting
RO feed tank temperature
electrical wiring failure.
heater switch to OFF. Notify Unit
rises above 110 degrees F.
Maintenance.
Temperature transmitter TT-201 or Slot 12
Notify Unit Maintenance.
input card failure.
9
Reject or Product Flow
Reject or Product Flow Measurement loop
Open the Instrument/Solenoid Panel door
display shows zeros when
failure.
and check the appropriate Flow Transmitter
flow is observed.
1) If the display is blank, shutdown, set
the Main breaker to OFF and then
back to ON. If this does not correct
the problem, Re-program the
transmitter (WP 0043). If this still
does not correct the problem, notify
Unit Maintenance.
2) If the error message "E-PROM
ERROR (LOAD DEFAULTS?)" is
displayed, re-program the transmitter
3) Continue operation. Estimate the
product flow by subtracting the reject
flow from 56. Notify Unit
Maintenance.
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