TM 5-4610-223-12
Table 3-2. Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WATER PURIFICATION UNIT-Cont
13. DIATOMITE FILTER RUN TOO SHORT OR TOO LONG.
Step 1.
Incorrect diatomite dosage. Correct the diatomite dosage (para 2-4, c.).
Step 2.
Improper backwash. Backwash (para 2-4, b. (3)) and precoat the filter (para 2-4, b. (1)).
Step 3.
Insufficient precoating. Backwash (para. 2-4, b. (3)) and precoat (para 2-4, b. (1)) the filters.
Step 4.
Filter elements clogged. Remove and clean the elements (para 3-46 d.).
14. WATER NOT CLEAR AFTER FILTERING.
Step 1.
Filter elements not pre-coated properly. Backwash (para 2-4, b. (3)) and precoat the elements (para
2-4, b. (1)).
Step 2.
Filter elements clogged. Backwash (para. 2-4, b. (3)) and T)recoat (para 2-4, b. (1)) the elements.
Step 3.
Filter aid cake is broken. Backwash (para 2-4, b. (3)) and precoat (para 2-4, b. (1)) elements.
Step 4.
Filter elements loose or damaged. Tighten the elements if loose, replace damaged elements (para.
3-46).
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