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
1
MF feed pump P-3 does not
Damaged or corroded power cable
Remove power cable. Inspect connectors
cont.
come on for Fill/Hold, but
connections.
for damage and corrosion. Notify Direct
valve V111 cycles OPEN and
Support to replace the connector if damage
green Run light comes on.
found. Clean connector pins if corroded.
Red stop light is NOT on
(continued).
Damaged pump power cable.
Test electrical continuity between connector
ends. Replace cable if continuity is not
observed.
Corroded junction box connectors, loose
Clean corroded connectors; repair loose
wire inside junction box.
wires.
Failure of M502 motor contactor main
Open the PDP. Set the Main breaker to
contacts corroded.
ON. Set the System Mode Switch to
FILL/HOLD. Check the voltage between
the contactor output terminals and ground.
If one or more do not show voltage, replace
the contactor (WP0063).
Motor windings have failed.
Continuing, if voltage is found, replace
motor (WP0051).
2
MF feed pump P-3 does not
Failure of PLC #4 Slot Output card or
Open OCP display panel to expose the
come on for Fill/Hold, valve
failure of the motor contactor actuating
sub-panel (WP 0060). Open the PDP door
V111 cycles OPEN, but
coil failure.
and turn the Main Circuit Breaker to the ON
green MF Feed Pump Run
position. Locate the contactor and set the
light does not come on.
System Mode Switch to FILL/HOLD. 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
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 motor
If the contactor pulls in, find the PLC slot
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 IN9 and
ground (WP0060).
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 00-11
