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 7. General RO System Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
2
RO Feed Pump will not run.
Failure of PLC Slot #4 Output card or
If the contactor does not pull in:
cont.
Green Run light does not
failure of the M503 motor contactor
1) Open the Slot #4 wire-way cover.
come on or pump stops while
actuating coil failure (continued).
Locate the O2 terminal. Check for
operating. Red stop push
AC 110 volts between O2 and
button light is NOT on
ground.
(continued).
2) If voltage is not found, replace the
Slot #4 output card (WP 0060).
3) If voltage is found, replace the
contactor (WP 0063).
Failure of PLC Slot #2 Input card or M503
If the contactor pulls in, find the PLC Slot
motor contactor auxiliary relay.
#2 card. If channel 10 is OFF:
1) Open the Slot #2 wire-way cover.
Locate the IN10 terminal. Check for
AC 110-volts between IN10 and
ground while pushing and holding the
start button.
2) If voltage is found, replace the Slot
#2 Input card (WP 0060).
3) If voltage is not found, replace the
motor contactor (WP 0063).
3
RO Feed Pump P-4 was
CB116 circuit breaker has tripped.
Open PDP and check CB116 circuit
running, but stops, or fails to
breaker. Reset as needed. If it trips again,
start and the RED stop button
check for shorts. Be sure that the power
light is ON.
source is secured.
1) Open the P-4 motor terminal box and
disconnect the power cable wires.
Check for short in the wires and in
the motor. If in the motor, replace the
motor (WP0052).
2) If in a wire, pull all of the wires and
inspect. Replace the shorted wire
and any wire showing signs of
damage.
3) If the motor or wires do not show a
short, replace the circuit breaker
Contactor M503 Thermal Overload has
Shut down to standby. Open the PDP and
tripped.
locate contactor M503. Push in the Blue
overload reset button (WP 0063).
Close the PDP and start the pump.
If the failure repeats,
1) Check for binding of the motor or
pump.
If shaft cannot be turned freely
by hand, remove the pump from
the motor. If the motor shaft will
not turn, replace the motor. If
the motor shaft turns, complete
the dissassembly of the pump,
clean the pump, and replace
worn parts. After assembly, be
sure that the motor shaft turns
freely (WP 0052).
0034 00-22
