Wilo XI4-OR Série Notice De Montage page 13

MAINTENANCE AND REPAIR
• Observe the locally applicable regulations!
For information on proper disposal, please consult
your local municipality, the nearest waste disposal
site, or the dealer who sold you the products.
Further recycling information can be found at
www.wilo-recycling.com.
8 Maintenance and repair
The motor is filled with food-safe white oil that
is potentially biodegradable. This motor filling is
used to lubricate the motor bearing and cool the
motor winding. Accordingly, there is no need to
carry out any maintenance work.
Any repairs to the motor or replacement of the
motor filling must be carried out by Wilo custom-
er service only.
9 Troubleshooting and possible solutions
In order to prevent damage to property and
serious injury when rectifying faults on the motor/
unit, observe the following:
• Only attempt to rectify a fault if qualified staff
are available, meaning that each job must be
carried out by trained and qualified personnel. For
example, electrical work must be performed by a
qualified electrician.
• Always secure the motor/unit against an unin-
tended restart and disconnect it from the mains.
Take suitable preventative measures.
• Always have a second person on hand to ensure
that the motor/unit can be switched off in an
emergency.
• Secure moving parts to prevent injury.
• Any unauthorised modifications to the motor/unit
are made at the operator's own risk and void the
manufacturer's warranty obligations.
9.1 Faults
9.1.1 Fault: The unit will not start or only after a delay
1. Power supply interrupted, short-circuit or earth
fault in the cable and/or motor winding
• Have the motor and wires checked by a special-
ist and replaced if necessary
2. Tripping of fuses, motor protection switch and/or
monitoring devices
• Have the connections checked by an expert
and changed if necessary
• Install and set motor protection switches and
miniature circuit breakers according to the
technical instructions, reset monitoring devices
• Check that the impeller runs freely. If necessary
clean it and ensure it runs freely again
3. Water consumption too low
• Water extraction is not detected, install a dia-
phragm expansion tank
9.1.2 Fault: The unit starts, but the motor protection
switch triggers shortly after commissioning
1. The thermal trigger on the motor protection
switch has been chosen and set incorrectly
(1~ motor)
Installation and operating instructions Wilo-XI4-OR-...
• Have a specialist compare the selection and
setting of the trigger with the technical specifi-
cations and correct it as necessary
2. Increased current consumption due to major
voltage drop
• Have an electrician check the voltage on each
phase and rewire if necessary
3. Incorrect direction of rotation
• Change the direction of rotation
4. Impeller slowed by accumulation, clogging and/or
solid matter, increased current consumption
• Switch off the unit, secure it against being
switched back on again and free the impeller or
clear the suction port
5. The density of the fluid is too high
• Consult the manufacturer
9.1.3 Fault: The unit is running but not pumping
1. No fluid available
• Check inlet, open slide valve if necessary
• Clean the supply line, slide valve, suction piece,
suction port or suction strainer
• During standstill, the pressure pipe drains;
check the pipework for leakage and the
non-return valve for contaminants; remedy
errors
2. Impeller blocked or slowed
• Switch off the unit, secure it against being
switched back on again and free the impeller
3. Defective piping
• Replace defective parts
4. Intermittent operation (cycling)
• Check switching system
9.1.4 Fault: The unit runs, but not within the specified
operating values
1. Inlet blocked
• Clean the supply line, slide valve, suction piece,
suction port or suction strainer
2. Impeller blocked or slowed
• Switch off the unit, secure it against being
switched back on again and free the impeller
3. Incorrect direction of rotation
• Change the direction of rotation via the menu
4. Air in the system
• Vent the system
5. Defective piping
• Replace defective parts
6. Inadmissible levels of gas in the fluid
• Consult the factory
7. Excessive decrease in the water table during
operation
• Check the system's supply and capacity
8. "Pmax" value set too high
• Adjust the "Pmax" value according to the pump
curve or install a unit with greater output
9.1.5 Fault: The unit does not run smoothly and is
noisy
1. Unit is operating in an inadmissible range
• Check the operational data of the unit and
correct if necessary and/or adjust the operating
conditions
English
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