Wilo Wilo-Yonos PICO-STG 1-13 Series, Installation And Operating Instructions Manual, Page: 39 / 172

Installation and operating instructions Wilo-Yonos PICO STG 33
English
If the operating fault cannot be remedied, please consult a spe-
cialist technician or the Wilo factory after-sales service.
flashes
red/
green The pump is
ready for
operation
but not
running Pump will start
running inde-
pendently again
once the fault is
no longer pres-
ent 1. Undervoltage
U<160 V
or
Undervoltage
U>253 V
1. Check power
supply
195V < U < 253V
2. Excess module
temperature:
motor temper-
ature too high
2. Check
medium and
ambient
temperature
flashes
red Pump is not
functioning Pump is not
running
(blocked) Pump is not start-
ing independently
again Renew pump
flashes
orange Pump is not
functioning Pump is not
running Pump is not start-
ing Renew pump
LED off No
power
supply Electronics have
no voltage 1. Pump is not
connected
to the power
supply
1. Check cable
connection
2. LED defective 2. Check if the
pump is
running
3. Electronics
defective
3. Renew pump
LED Meaning Operating
status Cause Remedy