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
10
RO Feed Tank % Level reads
Level transmitter LT-201 or PLC Slot 12
2)
If reading is still less than 3.75mA,
cont.
0 with level in the tank, reads
input card failure, RO feed tank level low.
replace the transmitter (WP 0062).
a level other than actual by
3)
If reading is still less thank 3.75mA after
observation, or the reading
replacing the transmitter, check the
changes up and down rapidly
connector, cable, and panel wiring for
(continued).
open circuits. Perform these checks
with the PDP OFF.
4)
If no open circuits are found and the
current reading is still less than 3.75mA
with the PDP ON, replace Slot 12 input
card.
The RO % Rejection is calculated from the
11
RO % Salt Rejection display
Conductivity measurement loop failure.
TDS input, measured conductivity, the
is very low or very high
product flow and RO Feed Temperature.
compared to previous
Product flow loop failure.
One or more of these measurement loops
operational data.
has failed. Refer to individual
RO Feed Temperature loop failure.
troubleshooting items.
Feed TDS loop failure.
Refer to Item 5.
12
Product flow reading is not as
PLC Slot 10 output card failure or display
Conduct BIT test and stop at the display test.
expected from previous
failure.
If the display does not count up, refer to Item
operational data.
2 above.
Reconfigure the transmitter if the display
Flow transmitter FT-501or flow sensor
inside the instrument panel is not blank (WP
FE-501 failure.
perform the following. With the TWPS
operating normally, open the Instrument
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 several
times, replace the transmitter (WP
2) If the WARNING CHECK STATUS
message flashes on the display, refer to
Flow Loop Status Checking in WP0062.
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
replace the transmitter (WP 0062).
6) If the reject display on the flow
transmitter does not change as the
product flow is changed, replace the
flow sensor (WP 0062). If the problem
is not corrected, replace the flow
transmitter.
0035 00-12
