General Overhaul; Faults, Causes And Remedies - Wilo Rexa MINI3 Serie Instrucciones De Instalación Y Funcionamiento

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Faults, causes and remedies

9.3

General overhaul

Have the customer service team check the pump after 1,500 operating hours. All
components will be checked for wear and damaged components will be replaced.
10 Faults, causes and remedies
Pump not starting or switches off after a short time
Pump starts up, but does not supply fluid
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⇒ Comply with requirements concerning oil type and quantity!
8. Clean the screw plug, replace the seal ring with a new one and fully screw it in.
1. Interrupted power supply
⇒ Check the electrical connection of the pump.
⇒ Have a qualified electrician check fuses/residual-current devices.
2. Thermal motor monitoring has been tripped
⇒ Allow the pump to cool down. The pump will start automatically.
⇒ Pump switches on/off too frequently. Check the switching cycle of the
float switch.
⇒ Excessive fluid temperature. Check the temperature. If necessary, use a dif-
ferent pump.
3. Strainer/impeller blocked with sand/clogged
⇒ Shut down the pump, remove it and clean it.
4. Float switch not operational
⇒ The float switch must be able to move freely.
1. Pressure pipe/discharge pipe clogged
⇒ Flush out the pressure pipe.
⇒ Flush out the pressure hose.
⇒ Remove any kinks in the pressure hose.
2. Non-return valve contaminated
⇒ Shut down the pump, remove it and clean the pressure connection.
⇒ Replace faulty non-return valve.
3. Water level too low
⇒ Check inlet.
⇒ Pump pumping excessively. Check the switching cycle of the float switch.
4. Strainer blocked with sand/clogged
⇒ Shut down the pump, remove it and clean it.
5. Air in the pump/pressure pipe
⇒ Position the pump at a slight angle to allow air to escape.
WILO SE 2019-07