technical documentation manuals 308013008

Troubleshooting/maintenance/repair |
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11 Troubleshooting/maintenance/repair
Safety information
♦ Troubleshooting/maintenance/repair may only be carried out by adequately qualified persons, details see Table 1
Qualifications, page 2.
♦ Observe the 5 rules of electrical safety, see 2.3 5 rules of electrical safety, page 2.
♦ The impeller must be at a standstill.
11.1 Troubleshooting
Table 11 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.
Fan operation in resonant
frequency range
Consider chapter 8.3 Frequency converter (if used), page 21
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
Fan does not
reach nominal
speed
Control units (if used) such as
frequency converter or
transformer are set
incorrectly.
Correct the settings of the control units.
Defective motor winding Contact Systemair
Improperly aligned drive
motor
Contact Systemair
Motor does not
rotate
Mechanical blockage Remove the blockage
Incorrect supply voltage Check the supply voltage, re-establish the voltage supply.
Faulty connection
Disconnect from the power supply, correct the connection, see
circuit diagram.
Temperature monitor has
responded.
Allow the motor to cool down, find and resolve the cause of
the fault.
Electronics/motor
overheated
Insufficient cooling Improve cooling.
Ambient temperature too
high
Check if the correct fan is used for your application.
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