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 2. OCP Display and Instrument Loop Troubleshooting Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
12
Product flow reading is not as
7)
If the display is very unsteady while the
cont.
expected from previous
TWPS is operating normally, replace
operational data (continued).
the flow sensor (WP 0062).
PLC slot 11 input card or Flow Transmitter
With the TWPS in STANDBY, open the
FT-501 output failure.
Instrument/Solenoid Panel and set the flow
transmitter output as follows (WP 0062):
1) Press the MAIN MENU key. Use the
up/down arrows to display the
TEST/MAINT screen.
2) Press ENTER key to display the
STATUS screen.
3) Press the down arrow until the
OUTPUT screen appears.
4) Press ENTER key to display OUTPUT?
XX.XX mA
5) Use the arrows to change the display to
20.00 mA.
6) When the steps below are completed,
press MENU and then ESC to return to
the normal display screen.
PLC slot 11 input card or Flow Transmitter
Open the OCP display panel to expose the
FT-501 output failure (continued).
PLC. Locate the slot 11 input card. Open
the wire way cover and locate terminal C4+.
Remove the wire and turn the terminal screw
back in. Measure the mA (4-20mA) between
the terminal and the wire (WP 0060).
1) If the mA reading is 20 mA and the flow
meter display does not read
approximately 32, replace the Slot 11
input card (WP 0060).
2) If the mA reading is not 19.5 to 20.5,
replace the transmitter (WP 0062).
13
Product TDS reading is not as
Conductivity switch in the OFF position.
Set conductivity switch (on Instrument/
expected from previous
Solenoid Panel) to the ON position.
operational data or not in
agreement with portable TDS
Conductivity switch failure.
Check for 110 VAC between the switch outer
meter.
terminal screw and ground. If not found,
replace the switch.
PLC Slot 10 output card failure or display
Conduct BIT test and stop at the display test.
failure.
If the display does not count up, refer to Item
2 above.
Conductivity transmitter CT-501or
Reconfigure the transmitter if the display is
conductivity sensor CE-501A or 501B
not blank inside the Instrument Panel (WP
failure.
perform the following. With the TWPS
operating normally, open the
Instrument/Solenoid Panel to observe the
conductivity transmitter.
1) If the display is blank, replace the
transmitter (WP 0062).
2) If the WARNING CHECK STATUS
message flashes on the display, refer to
Conductivity Loop Status Checking in
0035 00-13
