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.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
1
Backwash Fail Alarm comes
Automatic valve failed to operate.
Shut down to standby. Conduct BIT self
on during backwash.
test procedure (WP 0013). See below for
troubleshooting any valve which does not
operate as required.
Backwash air supply solenoid valve
Continue with BIT and verify operation of
XV-901 solenoid coil failure.
solenoid valve XV-901. If it does not
operate, refer to Item 5 below.
Pressure transmitter PT-102 failure.
Open the OCP display panel to expose the
sub-panel. Locate the slot 12 card. If the
channel 1 light is blinking, replace PT-102
If Feed Flow Control is set to Manual,
Disconnect the MS connector. Start
XV-912 failure, cable failure or PLC Slot 6
backwash. Check for 120 volts between
Output card failure.
hot pin and ground. If present, reconnect
and feel the coil for 60 Hz buzz. If the coil
does not buzz, replace the solenoid coil.
valve (WP0061).
If 120-volt power is not noted, open the
OCP display panel to expose the sub-
panel. Find the slot #6 output card. Open
the wire-way and locate terminal O11. Start
backwash. If voltage is not measured
between terminal 11 and ground, replace
the slot #6 card.
If voltage is measured, troubleshoot the
wiring and MS connector for open circuits.
2
Automatic valve (except
Valve actuator.
Repeat the BIT test (WP 0013) and stop at
V-202) fails to cycle when
the test for the failed valve. Stop the air
tested during BIT self test.
compressor if on. Listen for air noise at the
valve actuator vent. Noise indicates a
failed piston seal. Repair or replace the
actuator (WP 0066).
PLC output card #5 relay failure.
Open the OCP display panel to expose the
subpanel. Find the slot #5 card. Open the
wire-way cover and locate the output
terminal for the failed valve. Repeat the
BIT test and stop at the test for the failed
valve. If 110v is not measured between the
terminal and ground, replace the slot #5
card (WP 0060).
V-111 Channel/terminal 8
V-112 Channel/terminal 3
V-113 Channel/terminal 4
V-201 Channel/terminal 7
V-201 Skip
V-401 Channel/terminal 5
V-402 Channel/terminal 6
0034 00-15
