12 | Troubleshooting
28 | 40
Instruction Manual DOLPHIN LG 0890-2680 A, LR 0700-2200 A_EN_en
12
Troubleshooting
Problem
Possible Cause
Remedy
The machine does not start.
The motor is not supplied with
the correct voltage.
●
Check the power supply.
Corrosion between the rotor
and the housing.
●
Eliminate by use of anti-cor-
rosion liquid.
●
Repair the machine (contact
Busch).
Solid foreign matter has en-
tered the machine.
●
Remove the solid foreign
matter or repair the ma-
chine (contact Busch).
●
Install an inlet screen if nec-
essary.
Ice in the machine, the operat-
ing liquid has frozen.
●
Carefully warm up the ma-
chine.
●
Defrost the operating liquid.
The motor is defective.
●
Replace the motor.
Water level too high inside
when starting
●
Start with the water level
specified.
Packing gland too tight
●
Loosen the gland adequate-
ly.
Belt too tight
●
Loosen the belt adequately.
Wear developing in the pump
●
Turn the impeller with force
and flush with water.
Discharge pressure too high
●
Make sure the vent line is
free of restrictions and is at
least same size as pump
connection.
Pump trip
If seized during commission-
ing, welding slag or other for-
eign matter may have been
drawn in from new pipes with
incoming gas.
●
Flush the machine and
check rotation by hand. If
trouble persists, contact
Busch.
Heavy lime deposit build-up
●
Flush the machine and
check rotation by hand. If
trouble persists, contact
Busch.
Discharge pressure too high
●
Make sure the vent line is
free of restrictions.
