Formula Air RS-EXL Podręcznik konserwacji - Strona 12
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9. TROUBLESHOOTING
Failure
Rotary valve
switches off
thermally
Rotary valve is
not running
Rotary valve
makes
"screaming"
sound
The material will
not pass the valve
without
accumulation
Possible causes
- Foreign body got stuck
- Rotor frozen
- Gear motor defective
- Rotor defective
- Motor protection set incorrectly
- Fuse defective
- Big voltage drop in power supply
- Working switch is off
- Motor protection switched of
thermally
- Conditions of operation are not
met in the control system
- Fuse defective
- Foreign body got stuck
- Rotor/rotor housing defective
- Volume of material per time unit in
periods larger than planned
- Airflow opposite through the
valve prevents proper material
flow
- Settling velocity of material less
than expected
- The material accumulates in
lumps which cannot pass
- The material is not removed fast
enough at the outlet of the valve
Proposed solutions
- Remove foreign body
- Thaw on the outside with hot
air or water
- Replace the gear motor
- Replace the rotor
- Adjust the motor protection
- Replace the fuse
- Replace the cables to a larger
square
- Stop the installation, switch on
the working switch
- See " Rotary valve switches off
thermally"
- Investigate why conditions are
not met
- Replace the fuse
- Remove foreign body
- Replace defective part
- Reduce the volume of material
feed, e.g. at chain filter.
- More frequent regeneration
- Shorter step‐interval of chain
conveyor
- Replace sealing lamellae
- Adjust the production machine to
change the flow of material
- Check the function of the
emptying system
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