TM 10-4610-232-12
Table 3-1. Operator Troubleshooting Guide (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Strainer plugs frequently with debris or large organic matter.
Step 1.
Step 2.
Check intake strainer.
Replace intake strainer if damage has occured.
NOTE
Site improvement per FM10-52 may be required to reduce sand input to equipment.
Site improvement per FM10-52 will be required to reduce debris input to the equipment. If site
improvement cannot be accomplished there is no repair for the problem and frequent shutdowns to clean
the in-line strainer will have to be tolerated.
CAUTION
Frequent stop/starts of the ROWPU pumps can cause motor starter contact arcing and
burnout.
3. Strainer alarm light stays on.
Step 1. Check strainer.
Clean strainer basket (para. 2-24 b(3)).
Step 2. Notify unit maintenance.
4. Basket strainer plugged alarm light is on and basket strainer is clean or not very dirty or basket strainer light is not on
and basket strainer is plugged (filter normal system only).
Step 1. Check feed valve.
Open feed valve. Press SYSTEM RESET.
Step 2. Notify unit maintenance.
1. Media filter loses media during backwash (waste water hose).
NOTE
If media has been changed within the last 24 hours, this situation is normal. Maintain
lower backwash flow rates until the media has been in use for 24 hours.
Step 1. Check feed flow during backwash.
Slowly close the feed control valve until prescribed flow rate is reached.
NOTE
If media continues to flow out of waste hose during backwash, close the feed control valve
until media stays in filter. Troubleshoot feed flowmeter.
2. MEDIA FILTER PLUGGED light stays on.
Step 1. Check SYSTEM RESET pushbutton.
Push in.
Step 2. Check media filter inlet/outlet gage.
Backwash media filter if differential pressure is greater than 25 psig (172 kPa).
Step 3. Notify unit maintenance.
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