Problems, Causes And Remedies - salmson NOS Serie Instalación E Instrucciones De Uso

ENGLISH

10. PROBLEMS, CAUSES AND REMEDIES

CAUTION! Only appropriately trained personnel must under-
take troubleshooting.
PROBLEMS
10.1 OUTPUT TOO LOW a) Back pressure too high:
b) Pump or pipework, not completely filled:
c) Suction lift too high or positive suction head
too low:
d) Impeller sealing gap too large because of
e) Wrong direction of rotation:
10.2 PUMP DOES NOT a) Pump casing, shaft seal, foot valve or suc-
PRIME OR ONLY tion line leaks:
INTERMITTENTLY b) Suction lift too high or positive suction
head too low:
c) Loose or jammed parts in the pump:
10.3 PUMP LEAKS a) Casing bolts not correctly tightened:
b) Mechanical seal leaks:
10.4 TEMPERATURE OF a) Pump or pipework not completely filled:
THE PUMP
b) Suction lift too high or positive suction
INCREASES head too low:
c) Pump is run against closed valve:
10.5 NOISY PUMP
a) Pump or pipework not completely filled:
b) Suction lift too high or positive suction
head too low:
c) Pump is not properly levelled or is
distorted:
d) Foreign material in the pump:
10.6 THE MOTOR a) Pump is not properly levelled or is dis-
CONTACTOR
torted:
TRIPS b) Earth fault:
c) Operating conditions outside of performan-
ce range of pump:
d) Loose or jammed parts in the pump:
CAUSES
a) Check the plant for contamination.
Regulate anew the operating point.
b) Vent and fill the pump as well as the suction or inflow line.
c) Check the liquid level; open the shut-off valves on the suction side. Clean the fil-
ters.
d) Replace worn parts.
e) Change the motor connection.
a) Replace the casing seal. Check the shaft seal. Check the flange connections.
b) Check the liquid level; open the shut-off valves on the suction side. Clean the filters
on the suction side.
c) Open and clean the pump.
a) Check the tightening torque of the casing boltse.
b) Check the seal surfaces and rubber material of the mechanical seal. In case of
damages exchange mechanical seal.
a) Vent and fill the pump as well as the suction line or inflow line.
b) Check the liquid level; open the shut-off valves on the suction side. Clean the filters
on the suction side.
c) Open the shut-off valve on discharge side.
a) Purge of air the pump and the pipework.
b) Check the liquid level; open the shut-off valves on the suction side.
Clean the filters on the suction side.
c) Check the pump levelling and alignment.
d) Dismantle and clean the pump.
a) Check the pump levelling and alignment.
b) Check the earth connection.
Check the potential causes such as damaged wirings or cables, leakages on elec-
trical parts.
c) Refer to pump operating conditions stated in technical data.
d) Open and clean the pump.
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REMEDIES