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 4. Automatic Valves, Air Solenoid Valves Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
5
Solenoid valve XV-901, XV-
Failed solenoid coil.
Replace coil with spare coil provided in the
902 or XV-903 fails to
BII (WP 0043). If the failure is not
operate during BIT test.
corrected, continue.
PLC Slot 5 output card failure, cable wiring
Open the OCP display panel to expose the
failure, or valve failure.
sub-panel. Locate the PLC Slot 5 card and
open the wire way. Check for AC voltage
between the terminal (see end of Table 4
next page) and ground when the BIT is
stepped to the test for the valve.
1) If there is no voltage, replace the Slot
5 output card (WP 0060).
2) If there is voltage, disconnect the
electrical connector at the valve.
Repeat the BIT and check for voltage
between the AC+ pin (pin A) and
ground. If no voltage, troubleshoot
the wiring and connector for an open
circuit.
3) If voltage is measured, replace the
valve (WP 0055).
PLC Slot 5 output card failure, cable wiring
Reference: The voltage will be noted for 5-
failure, or valve failure (continued)
seconds, then off and then on again three
times. The Slot 5 terminals are as follows:
XV-901 terminal 0
XV-902 terminal 1
XV-903 terminal 2
0034 00-17
