Wilo Actun OPTI-MSH Einbau- Und Betriebsanleitung Seite 80

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10.1.2. Fault: Unit is running but not pumping
1. No fluid available
• Check fluid level or inlet, if necessary open slide valve
• Clean the supply line, slide valve, suction piece, suction port, or suction strainer
• During standstill, the pressure pipe drains; check the pipework for leakage and the
non-return valve for contaminants; remedy errors
2. Impeller blocked or impaired movement
• Switch off the unit, secure it against being switched back on again and free the
impeller
3. Defective piping
• Replace faulty parts
10.1.3. Fault: The unit runs, but not within the specified operating values
1. Inlet blocked
• Clean the supply line, slide valve, suction piece, suction port, or suction strainer
2. Impeller blocked or impaired movement
• Switch off the unit, secure it against being switched back on again and free the
impeller
3. Air in the system
• Vent the system
4. Defective piping
• Replace faulty parts
5. Inadmissible levels of gas in the fluid
• Consult the manufacturer
6. Excessive decrease in the water table during operation
• Check the system's supply and capacity
10.1.4. Fault: The unit does not run smoothly and is noisy
1. Suction port, suction strainer, and/or impeller clogged
• Clean the suction port, suction strainer, and/or impeller
2. Impeller stiff
• Switch off the unit, secure it against being switched back on again and free the
impeller
3. Inadmissible levels of gas in the fluid
• Consult the manufacturer
4. Signs of wear
• Replace worn parts
5. Defective motor bearing
• Consult the manufacturer
6. Unit is installed under tension
• Check installation, use rubber expansion joints if necessary
80
TROUBLESHOOTING
WILO SE 11/2018 DIN A5