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)
THIS SECTION COVERS:
RO System
INITIAL SETUP:
TWPS Operating
Maintenance Level
Unit
RO SYSTEM MALFUNCTIONS
Table 7. General RO System Troubleshooting.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
1
RO Feed Pump P4 will not
At first start up, circuit breaker CB116
Set CB to On position (black handle up).
run or stops after running.
manually set to OFF position (black
Green Run light is on. Red
handle down).
stop push button light is NOT
on.
Failure of the motor contactor main
Open the PDP. Set the Main breaker to
contacts corroded.
ON. Push the RO feed pump start button.
Check the voltage between the contactor
output terminals and ground. If one or
more do not show voltage, replace the
contactor (WP 0063).
Electrical wiring or motor failure.
Set the Main Circuit Breaker to OFF. Open
the motor junction box and remove the
insulators from the wire connections. With
the wires spread apart, set the Main Circuit
Breaker to ON and push the RO feed pump
Start button. Measure the voltage from
each phase wire to ground.
1) If voltage is found at all three, replace
the motor (WP 0052).
2) If voltage is not found at a wire,
troubleshoot the wire run for the
location of the open circuit.
2
RO Feed Pump will not run.
Failure of RO Feed Pump Start button or
Open OCP display panel to expose the
Green Run light does not
PLC Slot #1 Input card.
sub-panel (WP 0060). Push and hold RO
come on or pump stops while
feed pump start. Check the Slot #1 LED
operating. Red stop push
lights. If channel 5 is not ON:
button light is NOT on.
1) Open the Slot #1 wire-way cover.
Locate the IN5 terminal. Check for
AC 110-volts between IN5 and the
AC Com terminal while pushing and
holding the start button.
2) If voltage is found, replace the Slot
#1 Input card (WP 0060).
3) If voltage is not found, replace the
RO Feed Pump Start button
Failure of PLC Slot #4 Output card or
Open the PDP door and turn the Main
failure of the M503 motor contactor
Circuit Breaker to the ON position. Locate
actuating coil failure.
the contactor. Make sure the low level
alarm is not ON. Push and hold the start
button.
0034 00-21
