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Troubleshooting/maintenance/repair |
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12 Troubleshooting/maintenance/repair
12.1 Safety information
♦ Troubleshooting/maintenance/repair may only be carried out by adequately qualified persons, details see Table 1
Qualifications, page 6.
♦ Wear protective equipment during all work in the vicinity of the fan, details see 2.2 Personal protective equipment,
page 6.
♦ Observe the 5 rules of electrical safety, see 2.3 5 rules of electrical safety, page 6.
♦ Abide by the system-related conditions and requirements of the system manufacturer or plant constructor.
♦ The rotor must be at a standstill.
12.2 Troubleshooting
Table 11 Troubleshooting
Problem Possible causes Remedy
Fan does not run
smoothly
Rotor imbalance Rebalancing by a specialist company
Soiling on the rotor Clean carefully, rebalance
Material decomposition on the
rotor due to aggressive material
conveyed
Contact Systemair
Rotor rotates in wrong direction Change direction of rotation if possible, otherwise contact
Systemair
Deformation of rotor due to
excessive temperature
Ensure that the temperature does not exceed the certified
value/Install new rotor
Vibrations, oscillations Check the installation of the fan/check the duct system,
see 8 Installation, page 15
Air output of fan too
low
Rotor rotates in wrong direction Change direction of rotation if possible, otherwise contact
Systemair
Pressure losses too high Optimize the line routing
Flow regulators not or only
partly open
Check opening position on site
Intake or pressure ducts are
blocked
Remove the blockage
Grinding sounds
when starting or
operating the fan
Check if the duct connection
(inlet side) of the fan is strained
Loosen the duct connection (inlet side) and realign it.
Thermal contacts/
resistors have
triggered
Rotor rotates in wrong direction Change direction of rotation if possible, otherwise contact
Systemair
Motor overheated
Check the cooling impeller (if used), measure the motor
winding (if possible) / contact Systemair
Capacitor (if used) not or not
correctly connected.
Connect the capacitor correctly
Motor blocked
Contact Systemair
Fan does not reach
nominal speed
Defective motor winding
Contact Systemair
Improperly aligned drive motor
Contact Systemair
Control units (if used) such as
frequency converter or
transformer are set incorrectly.
Correct the settings of the control units.
Mechanical blockage Remove the blockage
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