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Fault and rectification
Operating_Manual_Fan_KXE_04_en.docx
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All fan structural designs are susceptible to the following faults
Fault Possible cause Remedial measure
Fan not running smoothly Build-up of material on the
impeller
Clean the impeller with a scraper
or brush
Impeller worn due to solid matter
in the handled gas
Replace the impeller
Impeller deformed as a result of
hot handled gas
Replace the impeller
Warping of the fan due to fixing
with uneven mounting surface
Loosen the fixing, even out the
mounting surface (e.g. using
washers), tighten the screws
with the prescribed tightening
torque. Refer to chapter 7.3.2
Screw connections
Warping of the fan due to
connections with duct work
which are not flush with the fan
openings
Align the duct work with the fan
openings and mount onto the fan
with warping removed. Refer to
chapter 8.3 Connecting the duct
work
Improper fixing of the anti-
vibration mounts
Check the fixing and rectify as
necessary. Refer to chapter 7.4
Securing the fan
Rubbing noise audible Nozzle scraping on the inlet
cone
Check the impeller clearance
and ensure correct minimum
gaps. Refer to chapter 8.2
Checking the impeller gap
Nozzle scraping on the inlet
cone
Align the duct work to the fan
and mount onto the fan with
warping removed
Protective hood scraping on
rotating part
Fit the protective hood with
clearance to the rotating part or
replace the protective hood in
the event of warping
Motor damage Replace or repair the motor
Handled gas escaping Shaft seal faulty or worn
Replace the sealing rings or
complete shaft seal. Refer to
chapter 13.3 Shaft seal
For shaft seal with barrier gas
connection: barrier gas pressure
too low
Increase the barrier gas
pressure and check connections.
Refer to chapter 8.6 Connecting
the shaft seal
For shaft seal with grease
injector: grease cartridge empty
or faulty
Replace the grease cartridge
Table 11-1 Faults and remedial measures (all structural designs)