Installation and operating instructions Wilo-Stratos
35
English
10.4 Warning messages: Error LED “off“
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
Check electrical
installation
E07
Generator operation
Driven by admission
pressure pump
Balance pump capacity
regulation
E09
Generator operation
Driven by
reverse
flow through “off”
pump
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
(automatic night
setback)
Call customer services
E51
non-permissible
combination
Different pumps
E52
Master/slave
communication
error
Pump switches from
standard mode to
fixed characteristic
(depending on
chosen set value,
see fig. 9)
Stratos IF module
not correctly
positioned, cable
faulty
After 5 min. the
modules switch to
single-pump mode.
Reinstall modules,
check cable
MA
Master/slave not set
Specify master and
slave
Summary of Contents for Stratos-D
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