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| Troubleshooting/maintenance/repair
Activities cont'd
Check that the fan and its components are being used
correctly.
X
See normal operating
conditions
Check the current consumption and compare this with the
rated data.
X X
Check the vibration dampers (if used) are working
correctly and check for visible damage and corrosion.
X
See normal operating
conditions
Check the electrical and mechanical protective equipment
is working correctly.
X
See normal operating
conditions
Check the fan’s rating plate is legible.
X X
Check the connection clamps and screwed cable
connections for damage/defects, and check that they are
firmly seated.
X
See normal operating
conditions
Check the flexible connectors for damage.
X
See normal operating
conditions
Check the function of the standstill heating (if used)
X
See normal operating
conditions
Check the lubrication device (if available). See the manual
of the motor.
X X
Table 21 Monthly activities for fans used for emergency operation.
Check (if present)
Measures
Operational readiness of the fan unit Allow the fan to run for 2 hours
Operational readiness of the emergency system Allow the "emergency" system to run for 15 minutes
Function of the “emergency” control Test whether the “emergency” control effectively bridges all
the other controls and switches
Function of the standstill heating Switch the motor off. The standstill heating must switch on
automatically and remain switched on
Note:
For all other damage/defects, please contact Systemair. Defective safety-relevant fans (for Ex and smoke
extraction applications) must be replaced completely.
11.3.2 Variable-speed fans
Important
The fan may be destroyed due to unpermitted frequencies.
♦ Pay particular attention to damage from vibrations.
♦ After commissioning, start with shorter maintenance intervals.
♦ If no damage occurs, adjust the maintenance intervals up to the those stated in the operating
instructions.
♦ Responsibility for gradual adaptation is with the system operator.
11.3.3 Overhaul/further maintenance
Pay attention to the safety references and preconditions as in normal maintenance. For the following activities and
functions, contact Systemair:
• complete overhaul of motors
• replacement of bearings
• re-winding of motors
• monitoring of condition
• vibration analysis
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