10
| Troubleshooting/maintenance/repair
Important
Risk of contamination of the airflow sensor and the heating elements.
♦
Do not remove the built-in filter during operation.
♦
Change the filter frequently to avoid pressure- losses.
12
Troubleshooting/maintenance/repair
Safety information
♦
Observe 2
12.1 Troubleshooting
Table 4 Troubleshooting
Problem
Possible causes
Remedy
Fan does not run
smoothly
Soiling on the impeller
Clean carefully
Material decomposition on the impeller 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 fan
Vibrations, oscillations
Check the installation of the fan/check the
duct system, see 8
Fan operation in resonant frequency range
Consider chapter 9.3
Air output of fan too
low
Impeller rotates in wrong direction.
Contact Systemair
Wrong wiring configuration
Check and possibly correct the wiring
configuration
Pressure losses too high
Optimize the line routing.
Flow regulators not or only partly open
Check opening position on site.
Intake or pressure ducts are blocked
Remove the blockage.
Dirty air filters of the ventilation system.
Change filters.
Grinding sounds
when starting or
operating the fan
Check if the duct connections of the fan are
strained
Loosen the duct connections and realign it.
Thermal contacts/
resistors have
triggered
Impeller rotates in wrong direction.
Contact Systemair
Motor overheated
Contact Systemair
Motor blocked
Contact Systemair
Fan does not reach
nominal speed
Defective motor winding
Contact Systemair
Control units (
S-5EC
) is set incorrectly.
Correct the settings of the control units.
Mechanical blockage
Remove the blockage.
Motor does not
rotate
Faulty 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.
199495 | 001
Summary of Contents for 94729
Page 4: ......
