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34 Installation and operating instructions • Wilo-Yonos MAXO/-D/-Z • Ed.01/2022-08
No. Fault Cause Remedy
E30 Excessive temperature of
module
Interior of module too warm. Check operating conditions.
E31 Excessive power section tem-
perature
Ambient temperature too
high.
Check operating conditions.
E36 Electronics errors Electronics defective. Contact customer service.
If a fault cannot be repaired, contact a qualified specialist or customer service.
1)
Only for pumps with P1≥200W
2)
In addition to the LEDdisplay, the fault signal LED is continuously illuminated in red.
*
See also warning signalE21
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 Cause Remedy
E07 Generator operation Pump hydraulics have fluid
running through them.
Check system.
E11 Pump running dry Air in the pump. Check fluid pressure and
volume.
E21
*
) Overload Slow motor. Pump is operated
beyond its specifications (e.g.
high module temperature).
The speed is lower than during
normal operation.
Check ambient conditions.
*)
Also see fault messageE21
11 Spare parts
Original spare parts may only be obtained from local installers and/or Wilo customer service. To avoid queries
and order errors, please provide all data on the rating plate with every order.
12 Disposal
12.1 Information on the collection of used electrical and electronic products
Proper disposal and appropriate recycling of this product prevents damage to the environment and putting
your personal health at risk.
NOTICE
Disposal in domestic waste is prohibited!
In the European Union this symbol may be included on the product, the packaging or the ac-
companying documentation. It means that the electrical and electronic products in question
must not be disposed of along with domestic waste.
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