18
Pump NB/FB/WP/SM/F
Version: 27216 - E
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
(*) Consult the manufacturer
X
X
Impeller is unbalanced
Clean impeller, balance impeller (*)
X GLRD (mechanical seal) faulty
Too low = GLRD faulty on motor side
Too high = GLRD faulty on pump side
Usually both must be replaced! (in pairs)
X Foam forms
Use the correct sealing medium, see section
4.2.5 (sealing medium in the catchment
chamber system)
X
Foreign objects in the pump
Motor bearing faulty
Remove foreign bodies
Clean or replace pump housing
Replace motor bearing
X
Circuit breaker was tripped by motor
overload, circuit breaker rating too
low, coiling faulty
Throttle pump, smaller impeller diameter,
check electrical connection (compare with
motor plate), larger motor or replace stator
(*)
X
X
High amount of air n the pumping
medium
Degas the pumping medium
X
Cavitation
Throttle pump on pressure side
X
X
With plug-in shaft, clamping ring not
correctly assembled
Align the shaft or assemble the clamping
ring correctly. Assemble the slots of the shaft
and clamping ring on opposite sides
Pump stopped
Flow rate of the pump is too low
Motor overload
Pump end press
u
re too high
Increased bearing temperature
Pump leaking
Pump not running quietly
T
e
mp
erature of pum
p is
too high
Oil level indicator too high / too low
Cause of the malfunction
To eliminate the malfunction
