Faults, Causes And Remedies; Spare Parts - Wilo VeroLine-IP-Z Notice De Montage Et De Mise En Service

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10

Faults, causes and remedies

Fault
Pump does not start
The pump does not
pump properly
Pump runs at reduced
output
Pump making noises
Motor overheating
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Spare parts

26
Have faults remedied by qualified personnel only! Observe the
safety instructions in chapter 9 "Maintenance" on page 23.
• If the malfunction cannot be rectified, consult a specialist techni-
cian or the nearest Wilo customer service or representative office.
Cause
Motor does not start
The motor is damaged
Internal components blocked
by foreign body
Incorrect direction of rotation
of pump
Stop valve on the pressure side
closed
Stop valve on the pressure side
open
Possible delivery head losses
Inlet pipe partially blocked or
clogged
Insufficient supply pressure
Motor has bearing damage
Impeller grinding
Sluggish motor
Incorrect operating voltage
Spare parts may be ordered via a local specialist and/or Wilo customer
service.
To avoid queries and incorrect orders, all data of the rating plate
should be submitted for each order.
CAUTION! Risk of property damage!
Trouble-free pump operation can only be guaranteed when origi-
nal spare parts are used.
• Only use original Wilo spare parts.
• Information to be provided when ordering spare parts:
• Spare part number
• Name/description of the spare part
• All data on the pump and motor rating plate
NOTE:
For a list of original spare parts, see the Wilo spare parts documenta-
tion (www.wilo.com).
Remedy
Check whether operating voltage is applied to the motor
Replace motor
Dismantle the pump and clean it
For 3-phase connection, swap two of the three phases, e.g.,
L1 and L2, in the terminal box
Open stop valve and check it
Gradually open the stop valve and then completely open it
until the pressure has stabilised
Check for delivery head losses (if necessary, replace pipes
with larger diameter pipes)
Check pipe and clean it
Increase supply pressure, observe minimum pressure at the
suction port, check slide valve and filter on the suction side
and clean if need be
Have the pump checked by Wilo customer service or a spe-
cialised service centre and repaired if necessary
Check faces and centrings between lanterns and motor and
lantern and pump housing
Check whether the motor can be turned by hand (screw or
slot on the back of the motor)
Check whether the operating voltage on the terminals are
within the specified tolerance limits
WILO SE 11/2017