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Installation and operating instructions Wilo-VeroLine-IP-E, VeroTwin-DP-E 101
Legend The following types of errors can occur with differing priorities (1 =
lowest priority; 6 = highest priority):
11.1 Mechanical faults
Error type Description Priority
A
A fault exists; the pump stops immediately.
The fault must be acknowledged at the pump.
6
B
A fault exists; the pump stops immediately. The
counter is increased and a timer counts down.
After the 6th fault, this becomes a definite fault
and has to be acknowledged at the pump.
5
C
A fault exists; the pump stops immediately.
If the error exists for more than 5 min, the
counter is increased. After the 6th fault, this
becomes a definite fault and has to be
acknowledged at the pump. Otherwise the
pump restarts automatically.
4
D
Like error type A, but error type A has a higher
priority than error type D.
3
E
Emergency operation: warning with emer-
gency operation speed and activated SSM
2
F
Warning – pump continues to turn 1
Fault Cause Remedy
Pump does not start or stops working
Cable terminal loose Check all cable connections
Fuses defective Check fuses; replace faulty fuses
Pump runs at reduced output
Stop valve on the pressure side throt-
tled
Slowly open the stop valve
Air in the suction line Repair leaks on flanges, vent the pump,
change the mechanical shaft seal in case
of visible leakage
Pump making noises
Cavitation due to insufficient supply
pressure
Increase supply pressure, observe mini-
mum pressure at the suction port, check
slide valve and filter on the suction side
and clean if need be
Motor has bearing damage Have the pump checked by Wilo cus-
tomer service or a specialised service
centre and repaired if necessary
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