Use and Care Manual

17
EN
14.2. Decommissioning and disposal
When disassembling, parts under voltage are exposed, which can lead to electric shock when touched.
Before dismantling, disconnect the fan from all poles of the mains and secure against being switched
on again!
Parts and components of the device that have reached their lifetime, e.g. due to wear, corrosion, mechanical stress,
fatigue and/or all other, not directly recognizable effects, must be disposed of professionally and properly after disas-
sembly in accordance with national and international laws and regulations. e same applies to excipients in use such
as oils and fats or other substances. e conscious or unconscious reuse of used components such as e.g. impellers,
rolling bearings, motors. etc. can lead to a risk to persons, the environment as well as machinery and equipment. e
applicable local operating regulations must be observed and applied.
14.3. Spare parts (motor + impeller)
Replacement may only be carried out by trained and authorized personnel.
Fault Possible cause Remedy methods
■ Fan does not start ■ No power supply ■ Check mains supply / connections
■ Impeller does not rotate freely ■ Find out the causes and, if possible, remove
the fault. If not possible, contact the sup-
plier.
■ Motor overheated
/ temperature pro-
tection is tiggered
■ 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“
■ Device too noisy /
casing vibrations
■ Dirt deposits on the impeller ■ See chapter maintenance and cleaning
■ Imbalance of the impeller ■ Contact the supplier
■ Connection with intake or exhaust pipe /
duct causes vibrations / 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
■ Return flaps closed or only partially open ■ Check drive system / installation position of
the return flap
■ Duct system clogged ■ Remove blockage / clean protective grille
■ Speed control incorrectly set / incorrectly
connected
■ Check settings / switching unit and possibly
adjust / connect
15. TROUBLESHOOTING
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