User Guide

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40 Subject to technical alterations! WILO SE 03/2016
*) Only for pumps with P1 ≥ 800W
Table 10.2: Warning messages
If the fault cannot be remedied, please contact your local heating specialist
or Wilo customer services.
E52 Master/slave
communication
error
Stratos IF module
not correctly
positioned, cable
faulty
After 5 sec. the
modules switch to
single-pump mode.
Reinstall modules,
check cable
E53 Nonauthorised bus
address
Same bus 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
Code
No.
Symbol
flashing
Problem cause remedies