Warning Signals - Wilo Yonos MAXO Einbau- Und Betriebsanleitung

• Switch off the pump and try a restart at regular intervals. During E10 switch off the pump permanently after
10 minutes.
No. Fault
E04 Undervoltage
E05 Overvoltage
1)
E09 Turbine operation
E10 Blocking
2) *
E21 Overload
E23 Short-circuit
E25 Contacting/ winding
E30 Excessive temperature of
module
E31 Excessive power section tem-
perature
E36 Electronics errors
If a fault cannot be repaired, contact a qualified specialist or customer service.
1)
Only for pumps with P1 ≥ 200 W
2)
In addition to the LED display, the fault signal LED is continuously illuminated in red.
*
See also warning signal E21
10.5

Warning signals

• A signal is displayed.
• Fault signal LED does not light up.
• The SSM contact does not open.
• The pump is running at reduced performance.
No. Fault
E07 Generator operation
E11 Pump running dry
*
E21 ) Overload
*)
Also see fault message E21
Installation and operating instructions • Wilo-Yonos MAXO/-D/-Z • Ed.01/2022-08
Cause
Power supply on mains side
too low.
Power supply on mains side
too high.
Pump is operated backwards.
Rotor blocked.
Slow motor.
Motor current too high.
Winding defective.
Interior of module too warm.
Ambient temperature too
high.
Electronics defective.
Cause
Pump hydraulics have fluid
running through them.
Air in the pump.
Slow motor. Pump is operated
beyond its specifications (e.g.
high module temperature).
The speed is lower than during
normal operation.
Remedy
Check mains voltage.
Check mains voltage.
Check the flow and install
non-return valve if necessary.
Contact customer service.
Contact customer service.
Contact customer service.
Contact customer service.
Check operating conditions.
Check operating conditions.
Contact customer service.
Remedy
Check system.
Check fluid pressure and
volume.
Check ambient conditions.
en
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