ZIEHL-ABEGG MAXvent FV31 Series, Руководство по сборке, Страница: 24 / 32

7.2 Possible causes and remedial measures
Type of error Possible cause Adjustment
Fan does not run
(anymore) No line voltage
Line failure Check linevoltage
Earth fault Check motor connection and line voltage
Short circuit winding Replacing the motor / fan
thermal motor protection
has triggered (motor is
overheated) Check for free air passages; remove foreign bodies if
necessary
see "Impeller blocked or dirty"
Check temperature of supply air
Check voltage
only for 1 ~ motors: check capacitor
Impeller blocked or dirty - Switch off power to the motor and secure against
switching back on
- Check safe isolation from supply
- Remove safety grille
- Remove foreign bodies or soiling
- Remount the safety grille
- Further procedure as in the chapter
“ Start-up ”
Fan will not start only for 1 ~ motors: wrong
capacitor (capacity) Select capacity according to the rating plate
Temperature too low for
bearing grease Insert bearing with cold greasing
see "Fan does not run"
Fan turns too slowly Line failure
Undervoltage
Check line voltage
Incorrect circuit in the case
of a two-speed motor
In the case of Y/D switch-
over: Y instead of D
In the case of Y/YY switch-
over: Y instead of YY Connect to suit voltage according to rating plate
Only in 1~ motors: Capaci-
tor worn replace capacitor
Fan turns in wrong direction --> See this fault type
Impeller / blade scrapes /
brushes When indicated, clear foreign bodies/dirt from the fan
see "Impeller blocked or dirty"
Fan turns in wrong
direction Only in 3 ~ motors: Wrong
connection (phase se-
quence) Switch two mains phases
only for 1 ~ motors: capaci-
tor wrong connected Connect according to circuit diagram
Air fl ow to low Fan turns too slowly or in
wrong direction --> See this fault type
Assembly instructions MAXvent Trouble shooting
L-BAL-F054-GB 2018 Index 005 Part.-No. 00501414-GB
24/32