ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0035 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
TROUBLESHOOTING PROCEDURES
UNIT TROUBLESHOOTING - TWPS CONTROL SYSTEMS
Table 2. OCP Display and Instrument Loop Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
5
Feed Water TDS Display
PLC Slot 11 input card or TDS Set dial
2)
If voltage is noted but it does not
cont.
does not change as the Feed
failure (continued).
change as the TDS Set is adjusted,
Water TDS Set dial is
replace the TDS Set Adjust (Precision
changed (continued).
10-Turn) potentiometer (WP 0059).
3)
If there is no voltage, set the Main
breaker to OFF. Remove the wires and
check for resistance.
4)
If there is an open circuit, replace the
TDS Set Adjust (Precision 10-Turn)
potentiometer (WP0059).
5)
If resistance is measured and changes
as the TDS Set is changed, replace the
Slot 11 input card (WP 0060).
6
MF Feed Flow loop
PLC Slot 8 output card failure or display
Conduct BIT test and stop at the display test.
measurement error
failure.
If the display does not count up, refer to Item
(referenced from WP0034
2 above.
Table 5, Item 3 and Item 5).
Flow transmitter FT-101or flow sensor FE-
Reconfigure the transmitter if the display is
101 failure.
not blank (WP 0043). If this doesn't correct
the problem perform the following. With the
TWPS operating normally, open the
Instrument/Solenoid Panel to observe the
flow transmitter.
1) If the display is blank, shutdown to
standby. Set the Main breaker to OFF
and then back to ON. If the display
remains blank after repeating this
procedure several times, replace the
transmitter (WP 0062).
2) If the WARNING CHECK STATUS
message flashes on the display, refer to
Flow Loop Status Checking in WP
3) If the STATUS: ANALIZER screen
indicates FAIL, replace the transmitter
4) If the STATUS: SENSOR screen
indicates FAIL, replace the sensor (WP
5) If the EPROM ERROR (LOAD
DEFAULTS?) message is displayed,
follow the procedure to configure the
transmitter. (WP 0062).
6) If the display does not change as the
MF Feed Flow controls automatically to
maintain the RO Feed Tank level,
replace the flow sensor. If the problem
continues, replace the flow transmitter
7) If the display is very unsteady while the
TWPS is operating normally, replace
the flow sensor (WP 0062).
8) If during the shell sweep backwash step
the display does not show a rapid
increase in flow, or if the flow is less
than 200 gpm, replace the flow sensor
0035 00-6
