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Installation and operating instructions Wilo-VeroLine-IP-E, VeroTwin-DP-E 103
Tab. 10: Error table
Additional explanations of error
codes
Error E021:
Error 'E021' indicates that the pump requires more power than is per-
mitted. To ensure that the motor and electronic module do not suffer
irreparable damage, the drive protects itself by switching the pump
off if an overload lasts more than 1 minute.
The most common causes of this error are a pump that is configured
too small, especially when pumping viscous fluids, or an excessive
volume flow in the system.
When this error code is displayed, there is not an error in the electronic
module.
Error E070; possibly combined with error E073:
If additional signal lines or control lines are connected to the electronic
module, the effects of EMC (immission/interference resistance) may
interrupt communication. This results in error code E070 being displayed.
You can check this by disconnecting all the communication lines
installed by the customer from the electronic module. If the error no
longer occurs, there could be an external interfering signal on the
communication line(s) that exceeds the applicable standard values.
The pump can only return to normal operation once the source of
interference is remedied.
Electronics
errors
E070 Internal communica-
tion error (SPI)
Internal electronics error Request customer service AA
E071 EEPROM error Internal electronics error Request customer service AA
E072 Power section/fre-
quency converter
Internal electronics error Request customer service AA
E073 Impermissible elec-
tronic module number
Internal electronics error Request customer service AA
E075 Charging relay defec-
tive
Internal electronics error Request customer service AA
E076 Internal transformer
defective
Internal electronics error Request customer service AA
E077 24 V operating voltage
for differential pres-
sure sensor defective
Differential pressure sen-
sor defective or con-
nected incorrectly
Check differential pressure
sensor connection
AA
E078 Impermissible motor
number
Internal electronics error Request customer service AA
E096 Infobyte not set Internal electronics error Request customer service AA
E097 FlexPump data record
missing
Internal electronics error Request customer service AA
E098 FlexPump data record
invalid
Internal electronics error Request customer service AA
E121 Motor PTC short-cir-
cuit
Internal electronics error Request customer service AA
E122 Interruption to NTC
power element
Internal electronics error Request customer service AA
E124 Interruption to NTC
electronic module
Internal electronics error Request customer service AA
Impermissi-
ble combina-
torics
E099 Pump type Different pump types
have been intercon-
nected
Request customer service AA
Classification No. Fault Cause Remedy Error type
HV AC
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