Installation and operating instructions Wilo-Varios PICO
27
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.
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.