Kessel STZ Instructions D'installation, D'utilisation Et D'entretien page 64

Pump is running, the given operating values are not being met
Cause
Inlet blocked
Gate valve in the discharge pipe closed
Impeller/propeller blocked or slowed
Incorrect direction of rotation
Air in the system
Pump is pumping against excessive pressure
Signs of wear
Defective hose/pipe
Impermissible gas content in the pumping medium
2-phase running
Excessive drop in the water level during operation
Pump is not running smoothly and is noisy
Cause
Pump is running in the impermissible operating range
Suction muff, screen and/or impeller/propeller blocked
Impeller stiff
Impermissible gas content in the pumping medium
2-phase running
Incorrect direction of rotation
Signs of wear
Motor bearing defective
Pump installed under tension
Leak from the 昀氀oating-ring type shaft seal
Cause
More leaks when running in new 昀氀oating-ring type shaft
seals
Floating-ring type shaft seal faulty
Further steps for fault elimination
If the points listed here do not help to eliminate the fault, contact Customer Service. They will be able to help as
follows:
• Phone and/or written support by Customer Service
• On-site support through Customer Service
• Inspection or repair of the pump at the plant
Please note that costs may be incurred when certain services provided by Customer Service are used. Customer
Service can give you more detailed information about this.
010-989
Troubleshooting and fault elimination
64 / 216
Remedy
Clean feed pipe, gate valve, suction adaptor, suction muff and
suction strainer
Open gate valve completely
Switch the pump off, secure it against restart, make impeller/
propeller serviceable again
Swap 2 phases of the mains cable
Check pipes, pressure sheath and/or pump part and vent if
necessary
Check the gate valve in the discharge pipe and open
completely if necessary
Replace worn parts
Replace defective parts
Consult the plant
Have a specialist check the connection and correct if necessary
Test supply and capacity of the system, check settings and
function of the level control
Remedy
Check pump operating data, correct if necessary and/or adapt
to operating conditions
Suction muff, screen and/or impeller/propeller blocked
Switch the pump off, secure it against restart, make impeller
serviceable again
Consult the plant
Have a specialist check the connection and correct if necessary
Swap 2 phases of the mains cable
Replace worn parts
Consult the plant
Check the installation
Remedy
Change the oil
Replace 昀氀oating-ring type shaft seal, consult the plant
2017/04