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
With the TWPS in STANDBY, open the
6
MF Feed Flow loop
PLC Slot 11 input card or Flow
Instrument/Solenoid Panel and set the flow
cont.
measurement error
Transmitter FT-101 output failure.
transmitter output as follows (WP0062):
(referenced from WP 0034
1) Press the MAIN MENU key. Use the
Table 5, Item 3 and Item 5)
up/down arrows to display the
(cont.).
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.
When the steps below are completed, press
MENU and then ESC to return to the normal
display screen.
Open the OCP display panel to expose the
sub-panel. Locate the Slot 11 input card
locate terminal IN 3+. Remove the wire and
turn the terminal screw back in. Measure the
mA (4-20 mA range) between the terminal
and the wire (WP 0060).
1) If the mA reading is 20 mA, and the
OCP MF Feed Flow display does not
read approximately 390 gpm, replace
the Slot 11 input card (WP 0060).
2) If the mA reading is not 19.5 to 20.5,
replace Flow Transmitter FT-101(WP
7
TMP cannot be adjusted to
PLC Slot 8 output card failure or display
Conduct BIT test and stop at the display test.
zero (with TWPS properly in
failure.
If the display does not count up, refer to Item
STANDBY).
2 above.
Or
With the TWPS operating normally, open the
Pressure transmitter PT-101 or 102
OCP display panel to expose the sub-panel.
failure, or open circuit
Locate the Slot 12 input card (WP 0060).
TMP reading is suddenly very
1) Locate the channel "0" status light. If
high and the TMP High alarm
blinking, check the PT101 cable and
is on.
connector for open circuit. If an open
circuit is not found, replace PT-101.
2) Locate the channel "1" status light. If
blinking, check the PT-102 cable and
connector for open circuit. If an open
circuit is not found, replace PT-102.
Open OCP display panel. Locate the Slot 12
Short circuit, Pressure Transmitter PT-101
input card on the sub-panel (WP 0060). If
failure or Slot 12 Input card failure.
module status light is not lit, replace card.
1) Remove IN0+ wire and turn terminal
screw back in. Measure the mA (4-
20mA range) between the wire and the
terminal.
0035 00-7
