10.2 Troubleshooting; 10.3 Maintenance; Replacing The Bearings - SystemAir Multibox MUB EC 025 315 Montage- Und Betriebsanleitung

GB

10.2 Troubleshooting

Table 7 Troubleshooting
P P r r o o b b l l e e m m P P o o s s s s i i b b l l e e c c a a u u s s e e s s
Fan does not run Rotor imbalance
smoothly
Soiling on the rotor
Material decomposition on the
rotor due to aggressive material
conveyed
Wrong direction of rotation of
rotor
Deformation of rotor due to
excessive temperature
Vibrations, Swingings
Air output of fan too Wrong direction of rotation of
low rotor
Pressure losses too high
Flow regulators not or only
partly open
Intake or pressure ducts are
blocked
Grinding sounds Check, if the duct connection
when starting or (inlet side) of the fan is strained
operating the fan
Wrong direction of rotation of
Thermal contacts/
resistors have rotor
triggered
Motor blocked
Fan does not reach Defective motor winding
nominal speed
Improperly aligned drive motor
Mechanical blockage
Motor does not Faulty supply voltage
rotate
Faulty connection
Temperature monitor has
responded
Insufficient cooling
Electronics/motor Ambient temperature too high
overheated

10.3 Maintenance

10.3.1

Replacing the bearings

By using ball bearings with „life-long lubrication", the fan is largely maintenance free. The bearings must be replaced
after the lubricant service life has expired (approx. 30,000 to 40,000 h in standard applications).
♦
315291 | 001
Troubleshooting/maintenance/repair |
R R e e m m e e d d y y
Rebalancing by a specialist company
Clean carefully, rebalance
Contact Systemair
Contact Systemair
Ensure that the temperature does not exceed the certified
value / Install new rotor
Check the installation of the fan / Check the duct system,
see 6.2 Instruction for installation, page 12
Contact Systemair
Optimize the line routing
Check opening position on site
Remove the blockage
Loosen the duct connection (inlet side) and realign it.
Contact Systemair
Contact Systemair
Contact Systemair
Contact Systemair
Remove the blockage
Check the supply voltage, re-establish the voltage supply
Disconnect from the power supply, correct the
connection, see circuit diagram.
Allow the motor to cool down, find and resolve the cause
of the fault, release the reactivation lock if required.
Check, if the correct fan is used for your application /
Improve cooling.
Check, if the correct fan is used for your application.
21