7.2 SEPARATING FUNCTIONS 7 FAULT FINDING
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7.2 Separating Functions
7.2.1 Bowl opens accidentally
during operation
7.2.2 Bowl fails to open for sludge
discharge
7.2.3 Unsatisfactory separation
result
Cause Corrective action
Strainer in the operating water supply is clogged. Clean the strainer.
No water in the operating water system. Check the operating water system and make sure
the valve(s) are open.
Hoses between the supply valves and separator are
incorrectly fitted.
Correct.
Nozzle in operating slide clogged. Clean the nozzle.
Rectangular ring in discharge slide is defective. Renew the rectangular ring.
Valve plugs are defective. Renew all plugs.
Supply valve for opening water is leaking. Rectify the leak.
Cause Corrective action
Strainer in the operating water supply is clogged. Clean the strainer.
Water flow too low. Check the water flow
Hoses between the supply valves and separator are
incorrectly fitted.
Correct.
Nozzle in operating slide missing. Fit the nozzle.
Rectangular ring in the operating slide or bowl body
is defective.
Renew the rectangular rings.
Cause Corrective action
Incorrect separation temperature. Adjust.
Throughput too high. Adjust.
Disc stack is clogged. Clean disc stack.
Sludge space in bowl is filled. Clean and reduce the time between sludge
discharges.
Bowl speed too low. Examine the motor and power transmission including
the belt transmission (clutch).
Bowl rotates i wrong direction Check the electrical connections to the motor.
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