Troubleshooting - Formula Air Rva-X Serie Wartungshandbuch

9. Troubleshooting

Problem
 Rotary valve switches
off thermally
 Rotary valve is not
turning
 Rotary valve makes
"screaming" noise
 Material will not pass
the valve without
accumulation
 Rotation disk doesn't
turn but rotor does
 Rotation detector
doesn't react
 Paint is
chipping/peeling
18
User manual | RVA Rotary valves ATEX
www.formula-air. com
Probable cause
 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
 It might be that something is stuck in the
rotary valve
 It might be that the motor or gearbox is
broken
 It might be that the motor or gearbox
shaft key is broken
 Foreign body got stuck
 Rotor/rotary valve body is defective
 The rotor turns the wrong way
 Rotor shaft is warped
 Rotor bearings are shot
 Lack of material going through, Empty
rubber vanes turning on metal
 Volume of material per rotation is larger
than planned
 Very high pressure difference (too high
under-pressure)
 Settling velocity of material less than
expected
 Rubber blade vanes are damaged, air
passes
 The material accumulates in lumps which
cannot pass
 The material is not removed fast enough
at the outlet of the rotary valve
 Transported material is too big/bulky
 Material agglutinates
 Material is wet or sticky
 Rotation disk and rotor axle are no longer
consolidated
 Rotary valve isn't running
 Cable is not connected
 Improperly connected cables
 Rotation disk isn't turning
 Detection distance is too big or too short
 High temperature material going through
 External environment factors
 Rubber blade vane friction on carcass
Possible solution
 Remove foreign body
 Thaw on the outside with hot air or water
 Replace motor, or gearbox
 Replace rotor
 Adjust the motor protection
 Replace fuse
 Insure voltage consistency
 Stop the installation, switch on the
working switch
 See "Rotary valve switches off thermally"
 Investigate why conditions are not met
 Replace fuse
 Investigate that nothing is stuck in the
rotor
 Investigate if a part is broken and needs
to be replaced
 Remove foreign body
 Replace defective component
 Wire the motor correctly
 Change complete rotor
 Replace rotor bearings
 Resize rotary valve
 See "Material will not pass the valve
without accumulation"
 Reduce the volume of material feed, or
replace rotary valve
 More frequent regeneration
 Replace rotary valve (with seals)
 Shorter step-interval of chain conveyor
 Replace rubber blade vanes
 Adjust the production machine to change
the flow of material
 Check the proper functioning of the
emptying system
 Use the adequate rotary valve
 Wrong application for the rotary valves
 Tighten rotation disk on rotor axle
 Turn on rotary valve
 Make sure cables are connected
 Insure proper cable connection
 See" Rotation disk doesn't turn but rotor
does"
 Verify installation distance
 Reduce material temperature
 Inappropriate use
 Place indoors
 Inappropriate use
 See "Rotary valve makes "screaming"
noise"