18 Wilo SE 07/2019
en
10.1 Fault signals
• The fault signal LED indicates a fault.
• The pump switches off (depending on the fault) and
attempts a cyclical restart.
If the fault cannot be remedied, contact a specialist
technician or Wilo customer service.
LED Faults Causes Remedy
Lights
up red
Blocking Rotor blocked Activate manual
restart or contact
customer service
Contacting/
winding
Winding defective
Flashes
red
Under/overvoltage Power supply too
low/high on mains
side
Check mains
voltage and
operating
conditions, and
request customer
service
Excessive
module
temperature
Module interior too
warm
Short-circuit Motor current too
high
Flashes
red/
green
Generator
operation
Water is flowing
through the pump
hydraulics, but there
is no mains voltage at
the pump
Check the mains
voltage, water
quantity/pressure
and the ambient
conditions
Dry run Air in the pump
Overload Sluggish motor,
pump is operated
outside of its specifi-
cations (e.g. high
module tempera-
ture). The speed is
lower than during
normal operation
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