BTS 2BV - Page 67

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6. Possible malfunctions and their solutions
Description of the fault
Probable cause
Methods of elimination
Motor does not start, pump does
not make any sound
Damage to the power supply line
Check the wiring and mains
voltage
The motor does not turn, but it
hums
- one of the electrical wires is
damaged or disconnected;
- significant deviation
of the supply voltage
from the nominal
value;
- jamming of the motor rotor;
-Damage to the shaft.
Check the mains voltage. Empty
and rinse the pump. If necessary,
restore the clearance between the
impeller and the walls of the
working chamber.
Check the integrity of the shaft. If
necessary
replace.
Automatic current
protection is activated
when the engine starts
- short circuit in the
winding;
- engine overload;
- the outlet pressure is
exceeded;
- too much working fluid;
Check the motor winding. Reduce
the supply of working fluid.
Reduce the pressure at the pump
outlet. Drain off any excess
coolant.
Engine overloading
Clogging
Flush the pump and remove any
blockages
The pump does not suck in air
- no working fluid;
- leaky connections;
- incorrect direction of
motor rotation.
Check the level of the working
fluid. Ensure that the connections
are tight. Swap the two half-ring
pump wires and change the
direction of rotation of
the motor.
The residual pressure is too high.
- You purchased the
wrong pump model;
- insufficient supply
of working fluid;
- The temperature of the
working fluid is too high;
- corrosion of the flowing
part of the pump;
- the system is not
sufficiently sealed;
- the seals are not tight
enough.
Purchase a more efficient model.
Increase the fluid supply. Cool the
working fluid. Ensure the system
is leaky, replace the seals.
Harsh sound during operation
- cavitation;
- excessive supply of
working fluid.
Connect the cavitation protection.
Limit the supply
of the working
fluid.
The pump is leaking
Damage to the seals
Check the integrity of the seals
Please note: this manual is subject to change without notice.