ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
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TROUBLESHOOTING PROCEDURES
OPERATOR/CREW TROUBLESHOOTING PROCEDURES
Table 3. MF Feed Pump P-3 Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
1
MF Feed Pump P-3 does not
Damaged pump power cable.
Notify Unit Maintenance.
Cont
come on for Fill/Hold, but
valve V111 cycles OPEN and
Corroded junction box connectors, loose
Notify Unit Maintenance.
green Run light comes on.
wire inside junction box.
Red stop light is NOT on
(continued).
Failure of M502 motor contactor main
Notify Unit Maintenance.
contacts corroded.
Motor windings have failed.
Notify Unit Maintenance.
2
MF Feed Pump P-3 does not
Failure of PLC #4 Slot Output card or
Notify Unit Maintenance.
come on for Fill/Hold, valve
failure of the motor contactor actuating
V111 cycles OPEN, but
coil failure.
green MF Feed Pump Run
light does not come on.
Failure of PLC Slot #2 Input card or motor
Notify Unit Maintenance.
contactor auxiliary relay.
3
MF Feed Pump P-3 does not
Failure of System Mode Switch or PLC
Notify Unit Maintenance.
come on for Fill/Hold, valve
Slot #3 Input card.
V-111 remains CLOSED, and
green Run light does not
come on.
4
MF Feed Pump P-3 will not
Failure of MF Feed Pump Start button or
Notify Unit Maintenance.
start in RUN. Green Run
PLC Slot #1 Input card.
light does not come on or
pump stops while operating.
Failure of PLC Slot #4 Output card or
Notify Unit Maintenance.
Red stop push button light is
failure of the motor contactor actuating
NOT on.
coil failure.
Failure of PLC Slot #2 Input card or M502
Notify Unit Maintenance.
motor contactor auxiliary relay.
5
MF Feed Pump P-3 comes
Automatic valves have not cycled
Complete the BIT self test (WP 0013) to
on for Fill/Hold but there is no
properly.
identify which valve is not functioning
MF Feed Flow reading on the
properly. Notify Unit Maintenance.
OCP Feed Flow indicator and
flow is not observed flowing
If pump was drained, the pump may be air
With the MF Feed Tank at least 50% full,
from the waste hose.
bound.
loosen the MF Feed Discharge Hose (F07)
coupling at the TWPS inlet connection until
water flows freely. Reconnect and repeat
the start up procedures.
6
MF Feed Pump P-3 was
CB111 motor circuit breaker is tripped.
Open PDP and check CB111 circuit
running, but stops and the
breaker (WP 0011). Reset as needed. If it
RED stop button light is ON.
trips again, notify Unit Maintenance to
troubleshoot for short circuits.
Contactor M502 Thermal Overload has
Shut down to standby. Open the PDP and
tripped.
locate contactor M01 (WP 0011). Push in
the Blue overload reset button.
Close the PDP and start the pump. If noise
is heard, refer to #2 above.
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