499247 AJR OIPM

499247
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 certied
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, nd and resolve the cause of
the fault
Electronics/motor overheated Insufcient cooling Improve cooling
Ambient temperature too high Check if the correct fan is used for your application