Wilo VeroLine-IPL Serie Notice De Montage Et Mise En Service page 17

8 Faults, causes and remedies
Faults
Pump does not start or fails to run
Pump runs at reduced
capacity
Pump makes noise
If the fault cannot be remedied, please contact your local plumbing and heating specialist or WILO customer
services.
9 Spare parts
Available spare parts (see Fig. 4, 5):
1 Exchange set complete
1.1 Set impeller with
1.11 Nut
1.12 Plain washer
1.13 Impeller
1.14 O-ring
1.2 Set mechanical seal with
1.11 Nut
1.12 Plain washer
1.14 O-ring
1.21 Mechanical seal complete
2 Exchange set motor
2.1 Vent screw
3 Pumphousing complete with
1.14 O-ring
Installation and operating instructions Wilo-IPL/-DPL (3-7,5 kW)
All manuals and user guides at all-guides.com
Possible cause
Pump chocked up
Loose terminals
Defect fuses
Faulty motor
Tripped overload relay
Incorrectly set trip relay
Thermal overload are influenced by
excessive ambient temperature
Tripped PTC-relay
incorrect rotation
Discharge valve throttled too far
Speed too low
Air in suction pipe
insufficient inlet pressure
Faulty motor bearings
Impeller scratches
ATTENTION!
Remedy
switch off power supply, take-off pump
head, remove obstruction; if motor blo-
cked, overhaul/exchange motor/pump
head
tighten all terminals
check fuses, change defect fuses
call service
throttle hydraulic flow rate down to
nominal at discharge side of pump
reset thermal overloads to name plate
FLC-value
reposition overload relay or protect by
thermal insulation
check motor and fan cover for dirt/dust
accumulation and clean if necessary;
check ambient temperature and if
necessary, ensure an ambient tempera-
ture 40 °C by forced ventilation.
check direction of rotation, if necessary
slowly open isolating valve
correct wrong terminal bridging
(Y in lieu )
check and correct flange leakages,
eventually vent pipe section
raise inlet pressure, ensure minimum
required inlet pressure at suction port,
check and if necessary clean suction-
side isolating valve and strainer
Arrange for pump to be inspected and, if
necessary, to be repaired by Wilo or
other authorized service.
Test the contact between lantern and
pumphousing. Clean it, if necessary.
3.1 Pumphousing (IPL, DPL)
3.2 Plug for gauge tappings
3.3 Check flap DN 80 (DPL-Pumps only)
3.4 Check flap DN 100
(DPL-Pumps only)
4 Fixing-screws motorflange / pumphousing
(also within exchange set motor)
Only original Wilo spare parts are to be
used to ensure the fault-free operation of
the pump.
When ordering spare parts, please state spare part
numbers - descriptions and all data of pump and
motor name plate.
Technical modifications reserved!
English
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