Wilo DrainLift BOX, Installation And Operating Instructions Manual

Page: 49 / 52

en
Installation and operating instructions • Wilo-DrainLift BOX • Ed.06/2022-10 49
10.2 Removing pumps for maintenance
purposes To carry out maintenance on the pumps easily, lift the pumps out of the tank.
1
2
3
Fig. 16: Removing the pumps
1 Discharge pipe to the pump
2 Discharge pipe in the tank
3 Discharge pipe, screwed connection
✓ Lifting unit decommissioned.
✓ Floor drain removed.
✓ Protective equipment put on.
1. Reach into the tank from above.
2. Loosen the screwed connection.
3. Take pump with discharge pipe out of the tank.
NOTICE! Damage to the connection cable! Take the pump out of the tank slowly and
be careful with the connection cable. Do not remove the pump out of the tank if the
connection cable is too short. Damaging the connection cable will lead to irreparable
damage!
11 Faults, causes and remedies
Fault Cause and remedy
The pump does not pump properly 4, 5, 6, 7, 8, 9, 10, 11, 12, 16, 17, 18
Volume flow too low 1, 3, 7, 9, 12, 13, 14
Current consumption too high 1, 4, 5, 8, 14
Delivery head too small 1, 3, 5, 7, 9, 12, 13, 14, 17
Pump does not run quietly/emits loud
noises 1, 3, 10, 13, 14, 15, 17
1. Inlet or impeller clogged
⇒ Remove deposits from the inlet, reservoir and/or pump → customer service.
2. Wear of inner parts (e.g. impeller, bearing)
⇒ Replace worn parts → customer service
3. Operating voltage too low
⇒ Have the mains connection checked → electrician
4. Float switch blocked
⇒ Check mobility of the float switch
5. Motor does not start because there is no voltage
⇒ Check the electrical connection → electrician
6. Inlet blocked
⇒ Clean the inlet
7. Motor winding or electric cable defective
⇒ Have the motor and electrical connection checked → electrician
8. Non-return valve clogged
⇒ Clean non-return valve → customer service
9. Water level dropped too low in the tank
⇒ Check level control and replace → customer service
10. Defective level control signal transmitter
⇒ Check signal transmitter and replace if necessary → customer service