Wilo Flumen EXCEL-TRE 50-3 90-2 Series, Installation And Operating Instructions Manual

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en
Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07 43
⇒ 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-re-
lated).
⇒ See “Fault: Mechanical seal leakage, pre-chamber/sealing chamber control reports 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 electrician.
2. Increased current consumption due to major voltage drop.
⇒ Have the voltage of individual phases checked by a qualified electrician. Contact 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. Contact 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.
4. Incorrect direction of rotation.
⇒ Have the connection corrected by a qualified electrician.
5. Signs of wear on propeller.
⇒ Inspect propeller and replace if necessary.
6. Motor bearings have worn.
⇒ Inform customer service; send the mixer back to the factory for reconditioning.