Troubleshooting - Wilo -FAG Installation And Operating Instructions Manual

English
In the case of larger deviations, please consult the manufacturer.
Please consult the appropriate operating manual for details on
inspecting the safety and monitoring devices on the auxiliary
lifting gear.
Changing the lubricant
The drained lubricant must be checked for dirt and water
content. If the lubricant is very dirty and contains more than
1/3 water, it must be changed again after four weeks. If there
is again water in the lubricant then, it seems likely that a seal
is defective. In this case, please consult the manufacturer. If a
sealing room or leakage monitoring system is being used, the
display will light up again within four weeks of changing the
lubricant if a seal is defective.
7.5 Repairs
When carrying out repair work, the following information
should always be noted:
- Round sealing rings as well as existing seals should always
be replaced.
- Screw fixings such as spring washers or the self-locking
Nord-Lock screw fixing should always be replaced.
- If no self-locking Nord-Lock screw fixing is used as a locking
screw or it is not possible to use these, then no dacromet-
coated screw should be used. In this case, screws made from
the material A2 or A4 must be used. The correct torques
must be observed.
- Never use brute force during this work.
Changing sealing parts
Changing sealing parts on the liquid side such as the block seal
cartridge and the mechanical seal shaft requires a certain amount
of specialist knowledge about these sensitive components.
In addition to this, in order to carry out the work, much of the
machine must be dismantled.
8 Shutdown
8.1 Temporary shutdown
For this type of shutdown, the machine remains installed
and is not cut off from the electricity supply. For temporary
shutdown, the machine must remain completely submerged so
that it is protected from frost and ice. Make sure the operating
room and the pumped fluid cannot be covered by ice. This
ensures that the machine is always ready for operation. During
longer shutdown periods, carry out a regular (monthly to
quarterly) function run for a period of 5 minutes.
8.2 Final shutdown / storage
Beware of hot parts!
When removing the machine, be careful of the
temperature of the housing components. These can
heat up to well above 40° C. Let the machine cool down
to ambient temperature before you touch it.
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Switch off the system, disconnect the machine from the electricity
supply and dismantle and store it. Note the following information
concerning storage:
- Clean the machine.
- Store it in a clean, dry place, protect the machine against
frost.
- Place it down vertically onto a firm foundation and secure it
against falling.
- Seal the intake and discharge ports of pumps with suitable
material (such as foil).
- Support the electric connecting lead on the cable lead-in to
help avoid a permanent deformation.
- Protect the ends of the electric power cable from moisture.
- Protect the machine from direct sunshine as a preventive
measure against brittleness in elastomer parts and the
propeller and casing coating.
- When storing the machine in a garage please remember:
Radiation and gases which occur during electric welding
destroy the elastomers of the seals.
- During lengthy periods of storage, regularly (for example
every six months) turn the impeller or propeller by hand.
This prevents indentations in the bearings and stops the
rotor from rusting up.
8.3 Restarting after an extended period of storage
Before restarting the machine, clean it of dust and oil deposits.
Then carry out the necessary mainte-nance actions (see
"Maintenance"). Check that the mechanical shaft seal is in
good order and working properly.
Once this work has been completed, the machine can be
installed (see "Installation") and connected to the electricity
supply by a specialist. See "Startup" a for instructions on
restarting.
Only restart the machine if it is in perfect condition and ready
for operation

9 Troubleshooting

In order to prevent damage or serious injury while rectifying
machine faults, the following points must be observed:
- Only attempt to rectify a fault if you have qualified staff. This
means each job must be carried out by trained specialist
staff, for example electrical work must be performed by a
trained electrician.
- Always secure the machine against an accidental restart by
disconnecting it from the electric system. Take appropriate
safety precautions.
- Always have a second person make sure the machine is
switched off in an emergency.
- Secure moving parts to prevent injury.
- Independent work on the machine is at one's own risk and
releases the manufacturer from any warranty obligation.
Fault1: The machine will not start
Cause Remedy
Electricity supply
interrupted – short circuit Have the motor and wires
or checked by a specialist and
earth connection in the replaced if necessary
cable or motor windings
Have a specialist inspect the
connection and correct them as
necessary
Have the motor protection
Fuses, the motor
switch adjusted
protection switch and/
according to the technical
or monitoring devices are
specifications, and reset
triggered
monitoring equipment
Check that the impeller/
propeller runs smoothly. Clean it
or free it as necessary
The moisture sensors See fault: Mechanical shaft seal
(option) has interrupted leaks, sealing chamber monitor
the power circuit reports fault and switches
(operator-related) the machine off
Fault2: The motor starts, but the motor protection switch
triggers shortly after start-up
Cause Remedy
Have a specialist compare the
The thermal trigger on
setting of the trigger with the
the motor protection
technical specifications and
switch is incorrectly set
adjust it if necessary
Have an electrician check the
Increased power
voltage on each
consumption due to
phase and rewire if necessary
major voltage drop
Have a specialist inspect the
Two-phase operation connection and correct it as
necessary
Have a specialist inspect the
Excessive voltage
connection and the switching
differences on the three
system and correct it as
phases
necessary
Incorrect direction of Swap the 2 phases from the
rotation mains supply
Impeller/propeller Switch off the machine, secure
impeded by adhesive it against being switched on
material, blockages and/ again and free the impeller/
or solid matter, increased propeller or clean the suction
current consumption port
The pumped fluid is too
Contact the manufacturer
dense
English
Fault3: Machine runs but does not pump
Cause Remedy
Open the container intake or
No pumped fluid
sliders
Clean the intake, slider, suction
Intake blocked
port or intake strainer
Switch off the machine, secure
Impeller/propeller blocked it against being switched on
or obstructed again and free the impeller/
propeller
Defective hose or piping Replace defective parts
Intermittent operation Check the control panel
Fault4: The machine runs, but not at the stated operating
levels
Cause Remedy
Clean the intake, slider, suction
Intake blocked
port or intake strainer
Slide in the discharge line
Fully open the slide
closed
Switch off the machine, secure
Impeller/propeller blocked it against being switched on
or obstructed again and free the impeller/
propeller
Incorrect direction of Replace 2 phases on the mains
rotation supply
Check the pipes, pressure
Air in the system shroud and/or pump unit, and
bleed if necessary
Check the slide in the discharge
Machine pumping against line, if necessary open it
excessive pressure completely, use a different
impeller or contact the factory
Signs of wear Replace worn parts
Defective hose or piping Replace defective parts
Inadmissible levels of gas
Contact the factory
in the pumped liquid
Have a specialist inspect the
Two-phase operation connection and correct it as
necessary
Check the supply and capacity
Excessive decrease in the of the system, and inspect
water table during operation the level control settings and
function
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