Wilo Economy MHI 16 Series, Installation And Operating Instructions Manual

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English
17
8. Fault finding, causes and remedies
If the fault cannot be remedied, please contact your local plumbing and heating
specialist or WILO customer services.
Subject to technical alterations.
Fault Cause Remedy
Pump does not run no power check fuses, float switches and cables
motor safety switch activated eliminate motor overload
Pump runs but does not pump wrong direction of rotation interchange two phases of the mains
connection
pipe or pump components blocked by
foreign body check and clean pipe and pump
air in inlet pressure gland seal inlet pressure gland
inlet pipe too narrow fit a larger inlet pipe
Pump does not pump evenly inlet too high position the pump lower
Pressure is insufficient wrong choice of pump fit a more powerful pump
wrong direction of rotation interchange two phases of the mains
connection
flow is too small, inlet pipe blocked clean filter and inlet pipe
valve not sufficiently open open valve
foreign body blocking the pump clean the pump
Pump vibrates foreign body in the pump remove foreign body
pump not properly fixed to the base tighten anchor bolts
base is not sufficiently heavy fit a heavier base
Motor overheats,
motor cut-out activates
insufficient voltage check voltage
pump sluggish:
foreign body
bearing damaged
clean pump
have pump repaired by customer services
ambient temperature too high provide cooling
WILO SE 04/2016