Sera MU-300 E 187.2, Operating Instructions Manual

Page: 53 / 58

53 TA 504
Rev.
3 en 11/2021
Subject to technical modifications! www.sera-web.com
EN
Electric agitator
MU-037300 E 187.2
MU-055450 E 114.2 / MU-075550 E 094.2
Operating instructions
12. Fault analysis and fault correction
sera
products are sophisticated technical products which are only shipped after having been thoroughly tested and
checked at our factory.
Should there be any faults , these faults can be detected and rectified easily and quickly on the basis of the instructions
in the table.
Fault type Possible cause Fault correction
Drive motor does not start Drive is overloaded Protective motor switch is activated Mixing element has become loose Strong vibrations of the shaft Formation of swirls in the mixture Loud running noises inside the drive motor
█ █ █
Voltage too high Check connection voltage
█ █ █
Electric data of the drive motor do not
match mains data
Check order data. Check electric installation.
Adjust motor to existing mains conditions
█ █ █
Viscosity of the medium is too high
Check viscosity of the medium and compare it with the design
data and, if applicable, reduce the viscosity or use an electric
agitator with a more powerful drive motor
█ █ █
Temperature is too low Check flowability of the medium.
█ █ █
Winding inside the drive motor is defect Send the electric agitator for repair
█ █
Wrong mixing element (too big)
Check order data. Mount the agitator element which is suitable
for the electric agitator
█ █
Motor terminal box is incorrectly wired Check the circuit inside the terminal box
█
Incorrect rotation direction of the drive
motor
Check the circuit inside the terminal box
█ █
Mounted position of the electric agitator is
in the centre of the tank
Install a baffle inside the tank or mount the electric agitator
eccentrically
█
Transport damage Send the electric agitator for repair
█
Operation with a frequency inverter Avoid critical motor speeds
█
Storage damage Send the electric agitator for repair