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Faults, causes and remedies
⇒ For frequent occurrence of air cushions: Locate and prevent air intake, if required
install ventilation systems at specified locations.
6. Pump pumping against excessive pressure.
⇒ Open all gate valves fully on the pressure side.
⇒ Check impeller type, if necessary use a different impeller type. Contact customer
service.
7. Signs of wear on the hydraulics.
⇒ Check components (impeller, suction port, pump housing) and have them replaced
by customer service.
8. Pipe system on the pressure side or pressure hose clogged.
⇒ Eliminate clogging and if necessary replace damaged components.
9. Highly gaseous fluid.
⇒ Contact customer service.
10.Only two phases present on the connection.
⇒ Have the connection checked and trimmed by a qualified electrician.
11.Excessive decrease in fluid level during operation.
⇒ Check supply/capacity of the system.
⇒ Check switching point of the level control device and adjust if necessary.
Fault: The pump does not run smoothly and is noisy
1. Impermissible duty point.
⇒ Check pump design and duty point, contact customer service.
2. Hydraulics clogged.
⇒ Clean hydraulics.
3. Highly gaseous fluid.
⇒ Contact customer service.
4. Only two phases present on the connection.
⇒ Have the connection checked and trimmed by a qualified electrician.
5. Incorrect direction of rotation.
⇒ Have the connection trimmed by a qualified electrician.
6. Signs of wear on the hydraulics.
⇒ Check components (impeller, suction port, pump housing) and have them replaced
by customer service.
7. Motor bearing is worn.
⇒ Inform customer service; pump back to factory for overhaul.
8. Pump is installed under tension.
⇒ Check installation, if necessary install rubber compensators.
Fault: Sealing chamber control reports a fault and switches the pump off
1. Condensation build-up due to extended storage or high temperature fluctuations.
⇒ Operate the pump briefly (max. 5 min.) without pencil electrode.
2. Increased leakage when running in new mechanical seals.
⇒ Change the oil.
3. Defective pencil electrode cable.
⇒ Replace pencil electrode.
4. Mechanical seal is defective.
⇒ Inform customer service.
WILO SE 2019-01
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