Table des Matières
Publicité
Mod. 3997 - 3997W - 3997C - 3997WC
9
Troubleshooting
Fault
1- The vacuum suddenly stops
2- The efficiency of the vacu-
um has dropped
3- Dust leaks from the vacu-
um silencer
4- Electrostatic current on the
vacuum
Causes
1- Thermic protection tripped
(red warning light)
1- The differential has acti-
vated (blue warning light)
2- Clogged primary filter
2- Clogged suction pipe
3- The filter is torn
3- Inadequate filter
4- Non existent or inefficient
earthing
-84-
© C.F.M. S.p.A.
Tutti i diritti riservati / All rights reserved
Tous droits réservés / Nos reservamos todos los derechos
Remedies
1- Check the setting of the
thermic protector.
Check the motor power
draw. Contact an author-
ized after-sales center if
necessary.
1- Reset the thermic protec-
tor.
1- Shake the filter. Replace
it if this is not sufficient
2- Shake the filter. Replace
it if this is not sufficient
2- Check the suction pipe
and clean it
3- Change it for another of
identical category
3- Change it for another of
suitable category and
check
4- Check all earth con-
nections. Particularly
check the suction inlet
fitting.
Lastly, the pipe must be
strictly antistatic
Publicité
Table des Matières
