User Guide

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38 Subject to technical alterations! WILO SE 03/2016
10.2 Fault signals – Air-conditioning AC operating mode
• A fault occurs.
• The pump goes off, the fault signal LED (continuous red light) is activated. The
error message appears on the display, fault contact (FC) opens. Then, the fault
needs to be reset by hand.
Double pump: The standby pump is switched on.
• The transmission of the fault via the serial digital interface depends on the type
of IF Module.
For details, see the documentation (Installation and operating instructions of
the IF Module).
NOTE: Code-nos. “E04” (mains undervoltage) and “E05” (mains overvoltage)
are treated as faults only in AC operation and lead to immediate deactivation.
Table 10.1: Fault signals
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 i.e. 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
E30 Module Excess temperature
module
Limited air supply to
the dissipator of the
module
Free air intake
E31 Module Excess temperature
power component
Ambient
temperature to high
Improve ventilation in
room
E36 Module Module faulty Electronic
components faulty
Call customer service /
swap module