Troubleshooting/maintenance/repair |
25
Troubleshooting cont'd
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.
Note:
For all other damage/defects, please contact Systemair. Defective safety-relevant fans (for Ex and smoke
extraction applications) must be replaced completely.
11.3 Maintenance
11.3.1 Maintenance
Warranty claims can only be made if maintenance work is carried out correctly and written evidence thereof is
provided.
We recommend regular maintenance intervals to ensure continuous fan operation. These maintenance intervals are
specified in the “Activities” table below. In addition, the operator must carry out follow-up activities such as cleaning,
replacing defective components or other corrective measures. For traceability reasons, a maintenance plan must be
created which documents the work carried out. This must be created by the operator. If the operating conditions are
"extreme", the maintenance intervals must be reduced so that maintenance is carried out more frequently. Examples
of extreme operating conditions:
• Fan unit in rare use (less than once a month)
• Fan used for emergency operation
• Ambient temperature > 40 ºC or < -10 ºC, or temperature fluctuations > 20 K
The following check list provides points of reference for the tasks to be carried out.
Table 20 Activities
Normal operating
conditions
Extreme operating
conditions
Activity
Every six
months
Annually Quarterly
Every six
months
Check the fan and its components for visible damage,
corrosion and contamination.
X X
Check the impeller for damage and imbalance.
X X
Clean the fan/ventilation system (see 12 Cleaning, page
27).
X X
Check the screwed connections for damages/defects and
check that they are firmly seated.
X
See normal operating
conditions
Check the fan intake is free from contamination.
X X
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