Wilo DrainLift M2/8 Notice De Montage Et De Mise En Service page 39

Faults
The pump doesn't pump properly
Volume flow too low
Current consumption too high
Delivery head too small
Pump runs roughly/loud noise
1)
Cause
Remedy
1 Pump inlet or impeller clogged
• Remove deposits in the pump and/or tank
2 Incorrect direction of rotation
• Exchange the 2 phases of the current feed
3 Wear of inner parts (impeller, bearing)
• Replace worn parts
4 Operating voltage too low
5 Running on two phases (only in the case of 3~ version)
• Exchange defective fuse
• Check line connections
6 Motor is not running since no voltage available
• Check the electric installation
7 Motor winding or electric line defective
8 Non-return valve clogged
• Clean non-return valve
9 Water level dropped too low in the tank
• Check/exchange the level monitor
10 Level monitor defective
• Check the level monitor
11 Slide valve in the pressure pipe is not or insufficiently open
• Open the slide valve completely
12 Impermissible amount of air or gas in the fluid
13 Radial bearing in the motor defective
14 Unit-related vibrations
• Check pipes to make sure they have a flexible connection
15 Temperature monitor for winding monitoring switched off due to excessive winding temperature
• After cooling off, the motor switched back on automatically.
16 Pump ventilation clogged
• Clean the ventilation line
17 Thermal overcurrent monitor triggered
• Reset the overcurrent monitor in the switchgear
1)
To remedy faults on parts which are under pressure, depressurise these first (vent the non-return valve and
drain the tank, with diaphragm hand pump if necessary).
2)
Further inquiry required
Installation and operating instructions Wilo-DrainLift M2/8
10 Faults, causes and remedies
Only have faults rectified by qualified personnel! Follow the safety instructions in
9bMaintenance.
• Observe the installation and operating instructions of the unit and the accessories!
• If the operating fault cannot be remedied, please contact your specialist technician or
Wilo Service or the closest Wilo representative.
2)
2)
Identifier: Cause and remedy
1,6, 7, 8, 9, 10, 11, 15, 16, 17
1, 2, 3, 7, 8, 11, 12, 13
1, 2, 4, 5, 7, 13
1, 2, 3, 5, 8, 11, 12, 13, 16
1, 2, 3, 9, 12, 13, 14, 16
2)
English
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