28
WILO SE 03/2021
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.
Manual restart
• The pump attempts an automatic restart upon
detecting a blockage.
If the pump does not restart automatically:
• Activate manual restart via the lower operating but
-
ton, press and hold for 5 seconds, then release.
The restart function is initiated and lasts 10 minutes.
The LEDs flash in succession clockwise.
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
temperature of
module
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 mains
voltage, flow rate/
pressure and
ambient conditions
Dry run
Air in the pump
Overload
Sluggish motor, pump is
operated outside of its
specifications (e.g. high
module temperature).
The speed is lower than
during normal
operation.
