ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0035 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
TROUBLESHOOTING PROCEDURES
UNIT TROUBLESHOOTING - TWPS CONTROL SYSTEMS
Table 3. OCP Miscellaneous Control Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
3
Initial drain failures to occur
SV-903 failure.
Return to standby. Step through the BIT test
cont
when MF Clean Switch is set
to the test for SV-903. If the valve fails to
to Drain #1.
operate, refer to WP0034, Table 4.
PLC Slot 3 input card or MF Clean
Open the OCP display panel to expose the
(Rotary) Switch failure.
sub-panel. Locate the Slot 3 card. Set the
MF Clean switch to Drain #1.
1) If the channel 4 light is ON, replace the
Slot 3 input card (WP 0060).
2) If the channel 4 light is OFF, open the
wire way and check for AC-Volts
between terminal IN4 and ground. If
there is voltage, replace the Slot 3 input
card (WP 0060).
3) If there is no voltage, replace the MF
Clean (Rotary) Switch (WP 0059).
Clean cycle does not
PLC Slot 3 input card or MF Clean
Open the OCP display panel to expose the
automatically start the RO
(Rotary) Switch failure.
sub-panel. Locate the Slot 3 card. Set the
Feed Pump and fill the MF
MF Clean switch to Fill/Recirc.
when the MF Clean Switch is
1) If the channel 3 and 4 lights are ON,
set to Fill/Recirc.
replace the Slot 3 input card (WP
2) If the channel 3 or 4 light is OFF, open
the wire way and check for AC-Volts
between terminals IN3 or IN4 and
ground. If there is voltage, replace the
Slot 3 input card (WP 0060).
3) If there is no voltage, replace the MF
Clean (Rotary) Switch (WP 0059).
RO Feed Pump does not stop
PLC Slot 3 input card or MF Clean
Open the OCP display panel to expose the
when the MF Clean Switch is
(Rotary) Switch failure.
sub-panel. Locate the Slot 3 card. Set the
set to Soak.
MF Clean switch to Soak.
1) If the channel 5 light is ON, replace the
Slot 3 input card (WP 0060).
2) If the channel 5 light is OFF, open the
wire way and check for AC-Volts
between terminal IN5 and ground. If
there is voltage, replace the Slot 3 input
card (WP 0060).
3) If there is no voltage, replace the MF
Clean (Rotary ) Switch (WP 0059).
0035 00-17
