Xylem Lowara Q-smart, Installation, Operation & Maintenance Manual

Page: 57 / 412

en - Original instructions
57
There could be a
problem with the
Sensor. Check the hydraulic con-
nection between the sen-
sor and the system.
Check the working order
of the sensor.
There is air in the sensor
or the hydraulic circuit
concerned.
Threshold too high
and the pump
does not reach the
required value. Change the threshold.
The pump is not
primed. Check the suction line and
priming of the pump.
The main protective device of the system is
triggered.
Cause Solution
Short circuit Check the connecting
cables.
In the case of a
single-phase
pump, the motor
capacitor is faulty. Replace the capacitor if it
is an external one. Con-
tact the local sales and
service representative if it
is an internal capacitor.