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| Troubleshooting/maintenance/repair
♦ The device may only be operated by people who are instructed in and have understood the function and risks, and
can act accordingly.
♦ Abide by the system-related conditions and requirements of the system manufacturer or plant constructor.
10.2 Preconditions
♦ Ensure access only to persons who can safely handle the device.
♦ Only use the fan in accordance with the operating instructions and the operating instructions for the motor.
♦ Safety elements may not be dismantled, circumvented or deactivated.
10.3 Speed-controlled fan operation
Please observe 8.5 Frequency converter (if used), page 22.
11 Troubleshooting/maintenance/repair
11.1 Safety information
♦ Troubleshooting/maintenance/repair may only be carried out by adequately qualified persons, details see Table 1
Qualifications, page 1.
♦ Wear protective equipment during all work in the vicinity of the fan, details see 2.2 Personal protective equipment,
page 2
♦ Observe the 5 rules of electrical safety, see 2.3 5 rules of electrical safety, page 2.
♦ Observe and respect local conditions, regulations and laws.
♦ Abide by the system-related conditions and requirements of the system manufacturer or plant constructor.
♦ The impeller must be at a standstill.
11.2 Troubleshooting
Table 19 Troubleshooting
Problem Possible causes Corrective actions
Fan does not run
smoothly
Impeller imbalance
Rebalancing by a specialist company if possible, otherwise
contact Systemair.
Soiling on the impeller Clean carefully, rebalance
Material decomposition on
the impeller due to
aggressive material
conveyed.
Contact Systemair
Impeller rotates in wrong
direction.
Change direction of rotation (swap two phases in case of a 3–
phase motor)
Deformation of impeller due
to excessive temperature.
Ensure that the temperature does not exceed the certified
value/Install new impeller.
Air output of fan
too low
Impeller rotates in wrong
direction.
Change direction of rotation (swap two phases in case of a 3–
phase motor)
Wrong wiring configuration
(e.g. Y instead of Delta).
Check and possibly correct the wiring configuration.
Intake or pressure paths are
blocked
Remove the blockage
Thermal contacts/
resistors have
triggered
Motor overheated
Check the cooling impeller (if used), measure the motor
winding (if possible) / contact Systemair
Impeller rotates in wrong
direction.
Change direction of rotation (swap two phases in case of a 3–
phase motor)
Missing phase Check if all 3 phase are present
Motor blocked
Contact Systemair
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