Wilo HC 20.1 + EMU FA Serie Manual De Instrucciones página 189

Installation and operating instructions Wilo Motor HC 20.1 + EMU FA, Rexa SUPRA, Rexa SOLID
Faults, causes and remedies
WARNING
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction port. There is danger of limbs be-
ing severed! Protective gloves must be worn to protect from cuts.
Fault: Pump does not start
1. Electricity supply interrupted or short-circuit/earth fault in the cable or motor
winding.
⇒ Have the connection and motor checked by a qualified electrician and replace
if necessary.
2. Tripping of fuses, of the motor protection switch or the monitoring device
⇒ 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 the technical specifications by a qualified electrician and reset monitor-
ing device.
⇒ Check the impeller to make sure that it runs smoothly, clean the hydraulics if
necessary.
3. The sealing chamber control (optional) has interrupted the electric circuit (connec-
tion-related)
⇒ See "Fault: Mechanical seal leakage, sealing chamber control reports a fault
and switches the pump off".
Fault: Pump starts up, motor protection trips after short period
1. Motor protection switch set incorrectly.
⇒ Have the adjustment of the trigger checked and corrected by a qualified elec-
trician.
2. Increased power consumption due to major voltage drop.
⇒ Have the voltage of individual phases checked by a qualified electrician. Con-
tact the electricity distribution network.
3. There are only two phases at the connection.
⇒ Have the connection checked and corrected by a qualified electrician.
4. Excessive differences in voltage between the phases.
⇒ Have the voltage of individual phases checked by a qualified electrician. Con-
tact the electricity distribution network.
5. Incorrect direction of rotation.
⇒ Have the connection corrected by a qualified electrician.
6. Increased power consumption through jammed hydraulics.
⇒ Clean the hydraulics and check the inlet.
7. The density of the fluid is too high.
⇒ Contact customer service.
Fault: Pump runs, there is no volume flow
1. There is no fluid.
⇒ Check the inlet, open all gate valves.
2. Inlet clogged.
⇒ Check the inlet and remove clogging.
3. Hydraulics jammed.
⇒ Clean the hydraulics.
4. Pipe system on the pressure side or pressure hose clogged.
⇒ Remove clogging and replace the damaged components if necessary.
5. Intermittent operation.
⇒ Check the switching system.
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