English
8 Problems, Causes and Remedies
8.1 Safety switches have cut out
Cause:
Foreign body in the pump, WSK triggered.
Remedy:
●
Turn off the pump and ensure that it is not turned on by unauthorised
personnel,
●
Close the shut-off fittings at the back and front of the pump.
●
Remove the pump from the liquid.
●
Remove foreign bodies from the pump.
8.2 Pump has no power
Cause:
The pump is sucking in air due to an excessive drop in the liquid level.
Remedy:
●
Check the function/adjustments of the control level.
Cause:
Pump working against insulating air cushion
Remedy:
Stationary wet-well installation
●
Lift the non-return valve using the fixing screw.
●
Once the typical noises (bubbling) have stopped, the pump is drained.
●
After draining, screw the fixing screw back in.
●
Where the non-return valve is very difficult to access, lift the pump roughly 3
cm along the chain and wait until no more air bubbles are released. Lower the
pump.
If no solution can be found, please contact your plumbing and heating specialist or your
nearest Wilo Customer Service or representative.
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Summary of Contents for Wilo-Drain STS 100 Series
Page 2: ...Fig 1...
Page 3: ...Fig 2a Fig 2b...
Page 5: ......
Page 61: ...STS 80 65 STS 100 100 20 10 2 2 1 2 2 2 3 2 4 VDE 58...
Page 68: ...7 3 1000 M8 4 1 8 8 1 WSK 8 2 3 Wilo 65...
Page 69: ......
