User Guide

Installation and operating instructions Wilo-Stratos /-D/-Z 31
English
Table 10.1: Fault signals
10.3 Warning messages
• The fault (warning only) is displayed.
• The fault signal LED and the FC relay do not respond.
•The pump continues to run. The fault may occur any amount of times.
• The indicated faulty operating state must not occur for a long period of time.
The cause should be eliminated.
EXCEPTION: If the “E04” and “E05” in HV operation w
arnings apply for longer
than 5 minutes, they are transmitted as fault signals (see Section 10.1).
Code
No.
Symbol
flashing
Problem cause remedies
E04 Supply
terminal
Mains undervoltage Mains overloaded Check electrical
installation
E05 Supply
terminal
Mains overvoltage Faulty supply by the
electricity supply
company
Check electrical
installation
E10 Motor Pump blocked e.g. sedimentation De-blocking routine
starts automatically.
Pump switches off if
blockage is not cleared
within max.40
seconds.
Call customer services
E20 Motor winding overheated Motor overloaded Let motor cool down,
check the settings
Water temperature
to high
Reduce water
temperature
E21 Motor Motor overload Sediment in the
pump
Call customer services
E23 Motor Short circuit/contact
fault
Motor defect Call customer services
E25 Motor Contact error Module not correctly
installed
Reinstall module
E30Module Excess temperature
module
Limited air supply to
the dissipator of the
module
Free air intake
E31Module Excess temperature
power component
Ambient
temperature to high
Improve ventilation in
room
E36Module Module faulty Electronic
components faulty
Call customer service /
swap module