16
Pump Typ Z
Version: 27215 -G.1
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
(*) Please contact the manufacturer
x
Foreign body in the pump, throttling
section worn, motor bearings defec-
tive, safety switch was triggered due to
motor overload, safety switch too
small, winding defective
Remove foreign body from the pump
housing, clean or change pump
housing, renew throttling section,
renew motor bearings, check electrical
connections / compare to motor
ratings plate, throttle pump, smaller
impeller (*), larger motor (*)
x
x
Impeller imbalanced, bearing defec-
tive, too little / too much or wrong lubri-
cant
Clean impeller, balance the impeller
(*), renew bearings, add / decrease or
completely change the lubricant
x
x
Coupling distance not maintained,
pump wrongly adjusted, pump distor-
ted or resonance vibrations in the pipe-
work, several pumps on one console,
increased axial thrust
Set correct distance, adjust pump cor-
rectly, check pipework connections /
pump mountings, single pump setting,
connect pipework via compensators,
install vibration damper under the
pump, stiffen the tank, clean relief
bores in the impeller
x
Rotation speed to high, pump too large
(wrong design)
Decrease rotation speed, smaller
pump (*), turn off impeller (*)
x
Pump delivery too small, pipework
blokked, closed valve on pressure side
Re-set pump, install a bypass for low
volume requirements, clean pressure
pipe, switch pump on only when requi-
red, pump must not run too long
against closed valve;
no reduction in temperature: use a
smaller pump (*)
x
Gaskets defective, pump badly adju-
sted, throttling section defective
Renew gaskets, adjust pump preci-
sely, check pipework connections,
renew throttling section.
Table 1: The causes and elimination of faults
P
u
mp st
a
nds still
too li
ttl
e
deli
ver
y
rate from pump
mo
to
r overload
too
low pu
mp p
ressure
to
o hi
g
h
p
u
mp
pr
es
s
u
re
h
ig
h
motor / bearing temp
eratu
re
p
u
mp leaks
p
u
mp ru
ns noisily
, ru
nning noises
p
u
mp temp
era
tu
re too high
Cause of the fault
Elimination of the fault
