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)
Table 3. MF Feed Pump P-3 Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
3
MF feed pump P-3 does not
Failure of System Mode Switch or PLC
Open OCP display panel to expose the
come on for Fill/Hold, valve
Slot #3 Input card.
sub-panel (WP 0060). Set Main CB to ON.
V-111 remains CLOSED and
Set mode switch to Fill/Hold. Check the
green Run light does not
slot #3 LED lights. If channel 0 is OFF:
come on.
1) Open the slot #3 wire-way cover.
Locate the IN0 terminal. Check for
AC 110-volts between IN0 and
ground.
2) If voltage is found, replace the Slot
#3 Input card (WP 0060).
3) If voltage is not found, replace the
System Mode Switch (WP 0059
Rotary Switch).
4
MF Feed Pump will not start
Failure of MF Feed Pump Start button or
Open OCP display panel to expose the
in RUN. Green Run light
PLC Slot #1 Input card.
sub-panel (WP 0060). Set Main CB to ON.
does not come on or pump
Complete the Fill/Hold step and set the
stops while operating. Red
Mode Switch to RUN. Push and hold MF
stop push button light is NOT
feed pump start. Check the slot #1 LED
on. If at startup, the Fill/Hold
lights. If channel 3 is not ON:
cycle was completed
1) Open the slot #1 wire-way cover.
correctly.
Locate the IN1 terminal. Check for
AC 110-volts between IN3 and
ground while pushing and holding the
start button.
2) If voltage is found, replace the Slot #1
Input card (WP0060).
3) If voltage is not found, replace the MF
Feed Pump Start button (WP 0059).
Failure of PLC Slot #4 Output card or
Open the PDP door and turn the Main
failure of the motor contactor actuating
Circuit Breaker to the ON position.
coil failure.
Complete the Fill/Hold step and set the
Mode Switch to RUN. Locate the contactor
and push the start button. If the contactor
does not pull in:
1) Open the slot #4 wire-way cover.
Locate the O1 terminal. Check for
AC 110 volts between O1 and ground
while pushing and holding the start
button.
2) If voltage is not found, replace the
Slot #4 output card (WP0060).
3) If voltage is found, replace the
contactor (WP 0063).
Failure of PLC Slot #2 Input card or M502
If the contactor pulls in, find the PLC slot
motor contactor auxiliary relay.
#2 card. If channel 9 is OFF:
1) Open the slot #2 wire-way cover.
Locate the IN9 terminal. Check for
AC 110-volts between IN8 and
ground while pushing and holding
the start button.
2) If voltage is found, replace the Slot #2
Input card (WP0060).
3) If voltage is not found, replace the
motor contactor (WP 0063).
0034 00-12
