Fault Finding, Causes And Remedies - Wilo MultiPress-MP 3 Serie Einbau- Und Betriebsanleitung

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8. Fault finding, causes and remedies

Fault
Pump does not run
Pump runs but does not pump
Pump does not pump evenly
Pressure is insufficient
Pump vibrates
Motor overheats,
motor cut-out activates
If the fault cannot be remedied, please contact your local plumbing
and heating specialist or WILO customer services.
Subject to technical alterations!
10
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Cause
no power
motor safety switch activated
wrong direction of rotation
pipe or pump components blocked by
foreign body
air in inlet pressure gland
inlet pipe too narrow
inlet too high
wrong choice of pump
wrong direction of rotation
flow is too small, inlet pipe blocked
valve not sufficiently open
foreign body blocking the pump
foreign body in the pump
pump not properly fixed to the base
base is not sufficiently heavy
insufficient voltage
pump sluggish:
foreign body
bearing damaged
ambient temperature too high
Remedy
check fuses, float switches and cables
eliminate motor overload
interchange two phases of the mains
connection
check and clean pipe and pump
seal inlet pressure gland
fit a larger inlet pipe
position the pump lower
fit a more powerful pump
interchange two phases of the mains
connection
clean filter and inlet pipe
open valve
clean the pump
remove foreign body
tighten anchor bolts
fit a heavier base
check voltage
clean pump
have pump repaired by customer services
provide cooling