Wilo Rexa FIT Serie Manual Del Usuario página 43

• Have the motor protection switches and fuses
installed or adjusted according to the technical speci-
fications, and reset monitoring equipment.
• Check that the impeller/propeller runs smoothly.
Clean or free it as necessary.
3 The moisture sensors (optional) have interrupted the
power circuit (operator-related)
• See fault: Mechanical shaft seal leak, moisture sen-
sors report a fault or shut down the unit.
9.0.2 Fault: The unit starts, but the motor protection
switch triggers shortly after start-up
1 The thermal trigger on the motor protection switch is
incorrectly set
• Have a specialist compare the setting of the trigger
with the technical specifications and correct if nec-
essary.
2 Increased power consumption due to major voltage
drop
• Have an electrician check the voltage on each phase
and rewire if necessary.
3 Two-phase operation
• Have a specialist inspect the connection and correct
it as necessary.
4 Excessive voltage differences on the three phases
• Have a specialist inspect the connection and the
switching system and correct it as necessary.
5 Incorrect direction of rotation
• Swap the two phases from the mains supply.
6 Impeller/propeller impeded by adhesive material,
blockages and/or solid matter, increased current con-
sumption
• Switch off the unit, secure it against being switched
on again, free the impeller/propeller or clean the
intake port.
7 The pumped fluid is too dense
• Contact the manufacturer.
9.0.3 Fault: Unit runs but does not pump
1 No pumped fluid
• Open the container intake or sliders.
2 Intake blocked
• Clean the intake, slider, intake port or intake strainer.
3 Impeller/propeller blocked or obstructed
• Switch off the unit, secure it against being switched
on again and free the impeller/propeller.
4 Defective hose or pipeline
• Replace defective parts.
5 Intermittent operation
• Check the control panel.
9.0.4 Fault: The unit runs, but not at the stated operating
levels
1 Intake blocked
• Clean the intake, slider, intake port or intake strainer
2 Slider in the discharge pipe closed
• Fully open the slider
3 Impeller/propeller blocked or obstructed
• Switch off the unit, secure it against being switched
on again and free the impeller/propeller
4 Incorrect direction of rotation
• Replace two phases on the mains supply
5 Air in the system
• Check the pipelines, pressure shroud and/or hydrau-
lics, and bleed if necessary
Installation and operating instructions Wilo-Rexa FIT...
6 Unit is pumping against excessive pressure
• Check the slider in the discharge pipe and open it
completely if necessary, use a different impeller or
contact the factory
7 Signs of wear
• Replace worn parts
8 Defective hose or pipeline
• Replace defective parts
9 Inadmissible levels of gas in the pumped liquid
• Contact the factory
10 Two-phase operation
• Have a specialist inspect the connection and correct
it as necessary
11 Excessive decrease in the water table during operation
• Check the supply and capacity of the system, and
inspect the level control settings and functionality
9.0.5 Fault: The unit does not run smoothly and is noisy
1 Unit is running in an inadmissible operation range
• Check the operational data of the unit and correct if
necessary and/or adjust the operating conditions
2 The intake port, strainer and/or impeller/propeller is
blocked
• Clean the intake port, strainer and/or impeller/pro-
peller
3 The impeller is impeded
• Switch off the unit, secure it against being switched
on again and free the impeller
4 Inadmissible levels of gas in the pumped liquid
• Contact the factory
5 Two-phase operation
• Have a specialist inspect the connection and correct
it as necessary
6 Incorrect direction of rotation
• Replace two phases on the mains supply
7 Signs of wear
• Replace worn parts
8 Defective motor bearing
• Contact the factory
9 The unit is installed under mechanical strain
• Check the installation, use rubber spacers if neces-
sary
9.0.6 Fault: Mechanical shaft seal leak, moisture sensors re-
port a fault or shut down the unit
(Moisture sensor monitoring is optional, and is not
available for all types. For more details, see the order
confirmation or the electrical connection plan.)
1 Condensation build-up due to lengthy storage and/or
temperature fluctuations
• Operate the unit briefly (max.
5 min.) without moisture sensors
2 Expansion tank (optional for polder pumps) is too high
• Install the expansion tank no more than 10 m above
the bottom edge of the intake port
3 Increased leakage when running in new mechanical
shaft seals
• Change the oil
4 Defective moisture sensor cables
• Replace the moisture sensors
5 Mechanical shaft seal is defective
• Replace the mechanical shaft seal and contact the
factory
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