|
19
EN
Fault
Possible cause
Remedy methods
■
Fan does not start
■
No power supply
■
Check mains supply / connections
■
Impeller does not rotate freely
■
Check the causes and, if possible, remove
them. If not possible, contact the supplier.
■
Engine overhea-
ted / temperature
protection is swit-
ched on
■
Fault of the ball bearings
■
Contact the supplier
■
Too high operating temperature
■
Observe the data on the nameplate
■
Air flow is too low, motor cannot cool
down
■
See fault „Low air flow“
■
Abnormal noises /
vibrations
■
Dirt deposits on the impeller
■
See chapter maintenance and cleaning
■
Imbalance of the impeller
■
Contact the supplier
■
Connection with intake or exhaust pipe
causes vibrations and oscillations
■
Install fan with vibration dampers
■
Fixing screws released
■
Tighten screws
■
Fault of the ball bearings
■
Contact the supplier
■
Loose impeller blade
■
Contact the supplier
■
Low airflow
■
Impeller runs in the wrong direction (wrong
air transport direction)
■
Note the marking on the device / namepla-
te. Check electrical connections
■
High pressure losses in the system
■
Improve piping configuration or select a
more powerful fan
■
Back flow shutter flaps not at all or only
partially open
■
Check the backflow flap on site
■
Inlet clogged
■
Remove blockage
■
Speed control incorrectly set / incorrectly
connected
■
Check settings / switching unit and possibly
adjust / connect
16. TROUBLESHOOTING
www.ruck.eu
