Wilo E 15 Serie Notice De Montage Et De Mise En Service page 15

9 Maintenance
Only allow qualified specialist staff to perform maintenance
and repair work.
DANGER! Danger of electric shock!
Any danger from electrical current should be ruled out.
• The pump should be electrically isolated and secured against
unauthorised switch-on during any maintenance or repair
work.
• Any damage to the connection cable should always be recti-
fied by a qualified electrician only.
10 Faults, causes and remedies
Faults
Pump is not running
although the cur-
rent entry is
switched on
Pump is making
noises
Building does not
get warm
Installation and operating instructions Wilo E.../1-5
Causes
Electrical fuse defective Check fuses.
Pump has no voltage
Cavitation due to insuf-
ficient suction pressure
Thermal output of the
heating surfaces is too
low
Remedy
Resolve the power
interruption
Increase the system
suction pressure within
the permissible range
Check the delivery head
and set it to a lower
height if necessary.
Increase setpoint
(see 8.2)
Set control mode to
Δp-c
English
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