Maintenance; Faults, Causes And Remedies - Wilo Yonos PARA Handbuch

9 Maintenance

DANGER! Danger of death!
A fatal shock may occur when working on electrical equipment.
• The pump must be electrically isolated and secured against unauthorised
switch-on during any maintenance or repair work.
• Any damage to the connecting cable must always be rectified by a qualified
electrician only.
After successful maintenance and repair work, install and connect the pump
according to the "Installation and electrical connection" chapter. Switch on the
pump according to the "Commissioning" chapter.

10 Faults, Causes and Remedies

LED Meaning
lights Pump in
green operation
blinks RKA model:
quick
green
PWM model:
blinks Pump in func-
red/ tion but stopped
green
blinks Pump out of
red function
LED off No power supply No voltage on
If the fault cannot be remedied, please consult the specialist technician or
the Wilo factory after-sales service.
Installation and Operating Instructions Wilo-Yonos PARA
Diagnostic
Pump runs according
its setting
Pump runs during 10
min in air venting
function. Afterwards
the targeted per-
formance must be
adjusted.
Pump in standby
Pump restarts by
itself after the fault
is disappeared
Pump stopped
(blocked)
electronics
Cause Remedy
Normal operation
Normal operation
Normal operation
1. Undervoltage 1. Check voltage supply
U<160 V
or
Overvoltage
U>253 V
2. Modul overheat- 2. Check water and
ing: temperatur
inside motor too
high
Pump does not Change pump
restart by itself due
to a permanent fail-
ure
1. Pump is not con- 1. Check cable
nected to power
supply
2. LED is damaged 2. Check if pump is
3. Electronics are 3. Cange pump
damaged
195 V < U < 253 V
ambient temperature
connection
running
English
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