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102 WILO SE 05/2015
11.2 Error table
Classification No. Fault Cause Remedy Error type
HV AC
-
0 No fault
System
errors
E004 Undervoltage Mains overloaded Check electrical installation CA
E005 Overvoltage Mains voltage too high Check electrical installation CA
E006 2-phase operation Missing phase Check electrical installation CA
E007 Warning! Generator
operation
(flow in flow direction)
The flow is driving the
pump impeller; electrical
current is being fed back
to the mains
Check the setting, check sys-
tem for proper operation
Caution! Prolonged operation
can cause damage to the elec-
tronic module
FF
Pump errors
E010 Blocking Shaft is mechanically
blocked
If the blocking has not been
removed after 10 seconds, the
pump switches off.
Check shaft for ease of move-
ment
Request customer service
AA
Motor errors E020 Excess winding tem-
perature
Motor overloaded Allow motor to cool down
Check settings
Check/correct the duty point
BA
Motor ventilation limited Provide unobstructed air
access
Water temperature too
high
Lower water temperature
E021 Motor overload Duty point outside of
duty chart
Check/correct the duty point BA
Deposits in the pump Request customer service
E023 Short circuit/earth
leakage
Motor or electronic mod-
ule defective
Request customer service AA
E025 Faulty contact Electronic module has no
contact to motor
Request customer service AA
Winding interrupted Motor faulty Request customer service
E026 WSK or PTC inter-
rupted
Motor faulty Request customer service BA
Electronic
modules
errors
E030 Excess electronic
module temperature
Limited air supply to the
heat sink of the elec-
tronic module
Provide unobstructed air
access
BA
E031 Excess hybrid/power
section temperature
Ambient temperature too
high
Improve room ventilation BA
E032 Intermediate circuit
undervoltage
Voltage fluctuations in
the mains
Check electrical installation FD
E033 Intermediate circuit
overvoltage
Voltage fluctuations in
the mains
Check electrical installation FD
E035 DP/MP: multiple
instances of same
identity
Multiple instances of
same identity
Reallocate master and/or slave
(see Chapter 9.2 on page 94)
EE
Communica-
tion errors
E050 BMS communication
time-out
Bus communication
interrupted or timed out
Broken cable
Check cable connection to
building automation
FF
E051 Impermissible DP/MP
combination
Different pumps Request customer service FF
E052 DP/MP communica-
tions time-out
Cable MP communication
defective
Check cable and cable connec-
tions
EE
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