Wilo Drain TM 32/7/60 Notice De Montage Et De Mise En Service page 26

en Faults, causes and remedies
Pump starts up, but does not supply fluid
Delivery rate drops while the pump is running
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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.
⇒ Install a bleed unit in the pressure pipe.
1. Pressure pipe/discharge pipe clogged
⇒ Flush out the pressure pipe.
⇒ Flush out the pressure hose.
⇒ Remove any kinks in the pressure hose.
2. Strainer blocked with sand/clogged
⇒ Shut down the pump, remove it and clean it.
3. Air in the pump/pressure pipe
⇒ Position the pump at a slight angle to allow air to escape.
⇒ Install a bleed unit in the pressure pipe.
WILO SE 2019-11