User Guide

Installation and operating instructions Wilo-Stratos/-D/-Z 39
English
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 warnings apply for longer
than 5 minutes, they are transmitted as fault signals (see Section 10.1).
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 1. Generator
operation
Driven by admission
pressure pump
Balance pump capacity
regulation
2. 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
E09
*)
Turbine operation The pump is driven
backwards
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 Bus 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 Invalid
master/slave
combination
Different pumps Single pumps: Use the
same pump types.
Double pump: Request
customer service or
read the pump type at
MA and SL using an IR
device. If the module
types deviate, request
the corresponding
replacement module