Wilo EMU TR 50-2 Serie Instrucciones De Instalación Y Funcionamiento página 328

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Faults, causes and remedies
⇒ Have the connection and the monitoring device checked by a qualified electri-
cian and change it if necessary.
⇒ Have the motor protection switches and fuses installed and adjusted accord-
ing to technical specifications by a qualified electrician and reset the monitor-
ing devices.
⇒ Check that the propeller rotates easily, and clean the propeller and mechanical
seal if necessary.
3. The sealing chamber control (optional) has broken the electric circuit (connection-
related).
⇒ See "Fault: Mechanical seal leakage, pre-chamber/sealing chamber control re-
ports a fault and switches the mixer off"
Fault: Mixer starts up, motor protection trips after short period
1. Motor protection switch set incorrectly.
⇒ Have the setting of the trigger checked and corrected by a qualified electri-
cian.
2. Increased current consumption due to major voltage drop.
⇒ Have the voltage of individual phases checked by a qualified electrician. Con-
tact the power grid operator.
3. The connection only has two phases.
⇒ Have the connection checked and corrected by a qualified electrician.
4. Voltage differences between the phases are too great.
⇒ Have the voltage of individual phases checked by a qualified electrician. Con-
tact the power grid operator.
5. Incorrect direction of rotation.
⇒ Have the connection corrected by a qualified electrician.
6. Increased current consumption due to clogging.
⇒ Clean propeller and mechanical seal.
⇒ Check the pre-treatment.
7. The density of the fluid is too high.
⇒ Check unit design.
⇒ Contact customer service.
Fault: Mixer runs, but system parameters are not reached
1. Propeller clogged.
⇒ Clean propeller.
⇒ Check the pre-treatment.
2. Incorrect direction of rotation.
⇒ Have the connection corrected by a qualified electrician.
3. Signs of wear on propeller.
⇒ Inspect propeller and replace if necessary.
4. The connection only has two phases.
⇒ Have the connection checked and corrected by a qualified electrician.
Fault: Mixer does not run smoothly and is noisy
1. Improper duty point.
⇒ Check fluid density and viscosity.
⇒ Inspect system configuration, and contact customer service.
2. Propeller clogged.
⇒ Clean propeller and mechanical seal.
⇒ Check the pre-treatment.
3. The connection only has two phases.
⇒ Have the connection checked and corrected by a qualified electrician.
WILO SE 2019-01