English
86
WILO SE 05/2010
11
Faults, causes and remedies
Have faults remedied by qualified personnel only! Follow the safety
instructions in Section 10 Maintenance
.
• If the malfunction cannot be rectified, consult a specialist techni-
cian or the nearest customer service or representative office.
Fault displays
For faults, their causes and remedies, see the “Fault/warning mes-
sage” flow diagram and the following tables. The first column of the
table lists the code numbers displayed in the event of a fault.
NOTE:
If the cause of the fault no longer exists, some faults resolve them-
selves automatically.
Key
The following types of errors can occur with differing priorities
(1 = lowest priority; 6 = highest priority):
11.1
Mechanical faults
Error type Explanation
Priority
A
Permanent error
6
B
Permanent error on the 6th occurrence
5
C
Warning,
after 5 min, transition to an error
permanent error on the 6th occurrence
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
1
Fault
Cause
Remedy
Pump does not start or stops working Cable terminal loose
Check all cable connections
Fuses defective
Check fuses; replace defective fuses
Pump is running at reduced output
Stop valve on pressure side throttled
Slowly open the stop valve
Air in the suction line
Seal leaks at the flanges; bleed
Pump is making noise
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 necessary
Motor has bearing damage
Have the pump checked by Wilo cus-
tomer service or a specialised service
centre and serviced if necessary
