TM 10-4610-232-12
Table 4-2. Unit Troubleshooting Guide (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Cartridge filter cover leaks.
Step 1. Check flanges on filter vessel and cover for warping, cracks or out of round.
(a) Replace cover if any damage is found (para. 4-44).
(b) Replace vessel if any damage is found (para. 4-44).
Step 2. Check the clamp T-bolts for damaged threads or stripping.
Replace damaged T-bolts (on-board spares) (para. 4-44).
5. Cartridge filter won’t drain or drains very slowly.
Remove the cartridge filter drain valve and tubing.
(a) Remove anything plugging the valve or tubing (para. 4-44).
(b) Replace tubing if it can’t be cleaned out (para. 4-44).
(c) Clean out the tubing that is attached to the filter bottom until water flows freely out of the filter
(para. 4-44).
PRESSURE GAGES.
1. Pressure gages are inaccurate, do not zero, or do not indicate pressure.
Step 1. Check valve positions.
Make sure all manual valves are positioned properly (Table 2-16) and only the media filter inlet and
outlet automatic valves are open (system "NORMAL" operation).
NOTE
All pressure pickup points are only active during SYSTEM NORMAL operation.
Certain points are not active during SYSTEM CLEAN or BACKWASH due to valve
positioning.
Step 2. Check gage for malfunctions.
Notify direct support maintenance.
2. Pressure gages leak.
Isolate leaks.
Notify direct support maintenance to replace gages or repair leaks.
3. High pressure gage fluctuates.
Visually inspect gage.
Notify direct support maintenance.
4. Media or cartridge filter pressure gages fluctuate.
Visually inspect gages.
Notify direct support maintenance.
FEED LOW PRESSURE SWITCH.
1. Feed pressure low light is not on and the feed pressure is 3 psig (21 kPa) or less, or, light is on and the feed pressure is
10 psig (69 kPa) or higher.
Operate unit and determine malfunction is true.
Notify direct support maintenance to troubleshoot feed low pressure switch circuits.
4-22
