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7
TROUBLESHOOTING
If the machine does not function (correctly), consult the
checklist below to see if you can remedy the error yourself.
Should this not be possible, contact your supplier.
WARNING
Always switch
OFF
the mains and compressed air before carrying out the
activities below. First read the maintenance
regulations at the beginning of this manual.
Symptom
Problem
Motor does not start.
Machine does not
function.
Motor makes a
Machine does not
humming sound, but
function.
does not run.
Motor stops
Machine does not
automatically.
function.
Control light
No indication.
extinguished during
cleaning process.
Control light blinks
Insufficient airflow.
("ALARM").
Control light keeps
No automatic filter
blinking ("ALARM").
cleaning.
Machine does not react
Activating off-line
to pressing CLEANING
cleaning and reset not
ON/OFF - RESET
possible.
button.
Poor suction.
Machine does not
function properly.
Dust or smoke coming
Pollution of the facility. Main filter damaged.
out of the filter cover.
Dust or smoke coming
Pollution of the facility. Dust tray placed incorectly.
from dust tray.
Vibrations in the
Machine not steady.
machine.
0507260020/150709/E Mobiflex 400-MS - Mobiflex 400-MS/C
the machine and disconnect it from
Possible cause
No mains voltage.
Mains cord defective.
Loose contacts.
Motor protection switch defective.
Motor defective.
Motor uses 2 phases instead of 3 (three-
phase motor only).
Motor capacitor defective/not connected
(single phase motor only).
Thermal relay activated.
Motor defective.
Control light defective.
Control PC board defective.
Saturated main filter.
Filter cleaning mechanism defective:
- 24 VAC magnetic valve defective
- control PC board defective
- filter cleaning mechanism defective or
worn
- no compressed air or compressed air
pressure too low
- pressure difference switch defective
- compressor defective (Mobiflex 400-
MS/C only)
CLEANING ON/OFF - RESET button
defective.
Control PC board defective.
24 VAC supply defective.
Inverted direction of rotation of the motor
(three-phase motor only).
Extraction fan polluted.
Outlet grid blocked.
Main filter clogged or saturated.
Spark arrester clogged or saturated.
Outside air is being extracted.
Filter cleaning mechanism defective.
Sealing on main filter damaged.
Main filter placed incorrectly.
Sealing material of dust tray defective.
Imbalance in the extraction fan.
Solution
Check the mains voltage.
Repair or replace mains cord.
Repair the contacts.
Replace the motor protection switch.
Repair or replace motor.
Repair the phase connection.
Repair or replace the motor capacitor.
Let the machine cool down for some time.
Check thermal relay settings (NTR)
according to electrical diagram.
Repair or replace the motor.
Replace control light.
Replace control PC board.
Carry out off-line filter cleaning cycle (ref.
5.3.3).
Replace main filter (ref. 6.2.1).
Replace magnetic coil or membrane.
Replace control PC board.
Replace the filter cleaning mechanism.
Check compressed air system and/or
compressed air connection.
Replace pressure difference switch.
Replace the compressor.
Replace CLEANING ON/OFF - RESET
button.
Replace control PC board.
Repair 24 VAC supply.
Change the direction of rotation.
Clean the extraction fan.
Remove obstructions from the outlet grid.
Replace main filter (ref. 6.2.1).
Clean or replace the spark arrester (ref.
6.2.2).
Check or replace the sealing material.
Repair cleaning mechanism.
Replace main filter (ref. 6.2.1).
Replace main filter (ref. 6.2.1).
Place main filter correctly.
Position dust tray correctly and tighten
star knob.
Replace sealing material.
Clean the extraction fan.
EN - 18
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