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
3
RO Feed Pump P-4 was
Contactor M503 Thermal Overload has
If the pump turns freely, check
(cont.)
running, but stops, or fails to
tripped (continued).
for loose wires.
start and the RED stop
2) Open the PDP. Leave the main CB
button light is ON
OFF. Check for loose wires
(continued).
At the top of the contactor
At the bottom of the thermal
overload.
At EMP shunts V116, 117 and
118.
3) Push the contactor in by hand and
hold. Check for continuity between
the top and bottom connections. If
not found on all legs, replace the
contactor and thermal overload
4) Open the connection box on the
motor and check for loose wires.
5) Open the junction box on the pump
skid and check for loose wires.
6) If the fault is not identified, replace
the motor.
4
RO Feed Pump P-4 leaks
Worn or damaged shaft seal.
Replace the pump seal (WP 0052).
between pump and motor.
5
RO Feed Tank Low Level
Reset the PLC as follows:
Alarm and HP pump stops.
- Set Mode to Standby.
- Drain RO feed tank.
- Open the MAIN circuit breaker at the PDP
(OFF position)
- Then close the MAIN circuit breaker (ON)
1) MF Feed Tank almost empty.
(1) Check level in MF Feed Tank. It should
never be less than one-third full. If it is,
troubleshoot raw water system as
described in Table 1.
(2) Level measurement loop failure
(2) Open the RO Feed Tank cover. If the
actual level is not almost empty, the level
measure loop has failed. Refer to WP
6
RO Feed Pressure Low
Reset the PLC as follows:
Alarm.
- Set Mode to Standby.
- Drain RO feed tank.
- Open the MAIN circuit breaker at the PDP
(OFF position)
- Then close the MAIN circuit breaker (ON)
- Follow normal startup procedures.
- Watch HP Pump Feed Pressure gage
PI-202.
If the system was in backwash and the RO
tank level is low, see response for RO feed
tank low level alarm, item 5.
0034 00-23
