User Guide

English
32 Subject to technical alterations!WILO SE 02/2011
Table 10.2: Warning messages
If the fault cannot be remedied, please contact your local heating specialist
or Wilo customer services.
Code
No.
Symbol
flashing
Problem cause remedies
E03 Water temperature
> 110°C
Heating control
incorrectly set
Set to lower
temperature
E04 Mains undervoltage Mains overloaded Check electrical
installation
E05 Mains overvoltage Faulty supply by the
electricity supply
company
Check electrical
installation
E07 Generator operation Driven by admission
pressure pump
Balance pump capacity
regulation
E09 Turbine operation The pump is driven
backwards (pump
perfusion from the
pressure to the
suction side)
Check circulation
direction. Fit a check
valve at the pressure
side
E11 Pump idling Air in the pump Vent pump and unit
E38 Motor Temp. sensor
medium faulty
Motor faulty Call customer services
E50 PLR/LON/CAN
communication fault
Interface, core
defective, IF
modules not
connected properly,
cable defective
The control system is
switched to local mode
control via the
interface after 5
minutes.
E51 non-permissible
combination
Different pumps
E52 Master/slave
communication
error
Stratos IF module
not correctly
positioned, cable
faulty
After 5 min. the
modules switch to
single-pump mode.
Reinstall modules,
check cable
E53 Nonauthorised CAN
address
Same CAN address
assigned twice
Carry out addressing
on the module once
again
E54 Connection I/O -
module
Connection I/O -
module interrupted
Check connection
MA Master/slave not set Specify master and
slave