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Installation and operating instructions Wilo Motor T 12 ... 72 + EMU FA, Rexa SUPRA, Rexa SOLID
Faults, causes and remedies
⇒ Have the motor protection switch and fuses installed or set according to the tech-
nical specifications; reset the monitoring devices.
⇒ Check impeller for ease of operation, clean hydraulics if necessary.
3. The sealing chamber control (optional) has interrupted the trip circuit (depending on
connection)
⇒ See "Fault: Mechanical seal leakage, sealing chamber control reports a fault and
switches the pump off"
Fault: Pump running, after a short time the motor protection triggers
1. The motor protection switch is incorrectly set.
⇒ Have the setting of the trigger checked by a qualified electrician and trimmed.
2. Increased power consumption due to major tension drop.
⇒ Have the tension values of the individual phases checked by a qualified electrician.
Consult the power supply operator.
3. Only two phases present on the connection.
⇒ Have the connection checked and trimmed by a qualified electrician.
4. Tension differences too large between the phases.
⇒ Have the tension values of the individual phases checked by a qualified electrician.
Consult the power supply operator.
5. Incorrect direction of rotation.
⇒ Have the connection trimmed by a qualified electrician.
6. Increased current consumption due to clogged hydraulics.
⇒ Clean hydraulics and check inlet.
7. Density of the fluid is too high.
⇒ Contact customer service.
Fault: Pump running, no flow rate present
1. No fluid present.
⇒ Check inlet, open all gate valves.
2. Inlet blocked.
⇒ Check inlet and eliminate clogging.
3. Hydraulics clogged.
⇒ Clean hydraulics.
4. Pipe system on the pressure side or pressure hose clogged.
⇒ Eliminate clogging and if necessary replace damaged components.
5. Intermittent operation.
⇒ Check switching system.
Fault: Pump running, duty point is not reached
1. Inlet blocked.
⇒ Check inlet and eliminate clogging.
2. Slide valve on the pressure side closed.
⇒ Open all gate valves fully.
3. Hydraulics clogged.
⇒ Clean hydraulics.
4. Incorrect direction of rotation.
⇒ Have the connection trimmed by a qualified electrician.
5. Air cushion in pipe system.
⇒ Vent the pipe system.
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