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
14
Product totalizer fails to count
PLC Slot 5 output card, solid state relay
Conduct BIT test and stop at the display test.
up when product flow is
display failure.
If the display does not count up, open the
indicated, or does not display
OCP display panel to expose the PLC.
properly during BIT test.
Locate the slot 5 output card. Open the wire
way cover and locate terminal 14. Measure
for 120 VAC between the terminal and
ground. WP0060
1) IF a momentary voltage is not
measured every 2 to 3 seconds during
the BIT test, replace the slot 5 output
card.
2) If a momentary voltage is measured,
locate the R535 and R536 solid state
relays. Remove the R535 relay and
replace it with the R536 relay. Repeat
the BIT test. If the totalizer works
properly, replace the relay.
3) If replacing the relay does not correct
the fault, replace the Slot 5 output card.
15
Hour meter fails to run when
Hour meter failure.
Check for voltage at terminal 14 on M504
the HP pumps are running.
and M505 with the HP pump running. If not
found, replace the hour meter (WP 0059).
16
High Temperature Alarm with
Temperature transmitter TT-201 or PLC.
Open the OCP display panel to expose the
temperature at RO Feed Tank
Slot 12 Input card failure.
sub-panel. Locate the Slot 12 input card.
temperature gauge (TI-201)
Open the wire way cover and locate terminal
much less than 110 degrees
IN5+. Remove the wire and turn the terminal
F.
screw back in. Measure the mA (4-20mA)
between the terminal and the wire (WP
1) If the reading is greater than 9mA,
check the cable and panel wiring for
short circuits.
2) If no short circuits, replace the
temperature transmitter. (WP 0062)
3) If the reading is less than 9mA, replace
the Slot 12 card (WP 0060).
0035 00-15
