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AJR Jet Fan | 15
11.2 Troubleshooting
Table 5: Troubleshooting
Note:
For all other damage/defects, please contact Systemair.
i
Problem
Possible causes
Remedy
Fan does not run smoothly
Impeller imbalance
Rebalancing by a specialist , otherwise contact Systemair
Soiling on the rotor
Clean carefully, rebalance
Material decomposition on the
rotor due to aggressive material
conveyed
Contact Systemair
Impeller rotates in wrong
direction
Contact Systemair
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
Contact Systemair
Incorrect wiring or control
settings
Contact Systemair
Intake/pressure paths blocked
Remove blockage
Thermal protections have
triggered
Motor overheated
Contact Systemair
Impeller rotates in wrong
direction
Contact Systemair
Missing phase
Check if all three phases are present
Motor blocked
Contact Systemair
Fan does not reach nominal speed Building control settings
Correct the settings of building controls
Defective motor wiring
Contact Systemair
Improperly aligned drive motor Contact Systemair
Faulty control signals
Check control signal wiring and verify signal value at the fan
Mechanical blockage
Remove the blockage
Motor does not rotate
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
Ambient temperature too high
Check if the correct fan is used for your application
Faulty control signals
Check control signal wiring and verify signal value at the fan
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
