31
Troubleshooting
Fault:
Cause and correction:
- No Sumlog function
- Check electrical connections
per wiring diagram.
- Check supply voltage,
Supply voltage 10.8...32 VDC,
- Check fuses in fuse box.
- No Sumlog function
- Check free movement of
- Pointer stays at zero at speed
paddle wheel,remove dirt de-
posits, replace paddle wheel
if necessary.
- Wrong indication
- Check paddle wheel shaft for
wear, replace paddle wheel if
necessary.
- Paddle wheel direction not
optimised,check installation.
- Recalibrate unit.
Maintenance of the VDO Sumlog
The indicating unit is maintenance-free. Use a humid, lint-free or antista-
tic cloth for cleaning. Do not use cleaning detergents.
On the sending unit, check the paddle wheel and the paddle wheel shaft
for wear once per season. Both paddle wheel and paddle wheel shaft
must be replaced together if the clearance is excessive (see page 36).
Check the two O-rings on the sending unit and the two O-rings of the
blind plug for wear, brittleness or damage at regular intervals (twice per
season). Even the slightest wear requires O-ring replacement.
Order numbers:
Paddle wheel with shaft (12 kn, km/h, mph)
270.023/005/003
Paddle wheel with shaft (30 and 50 kn, km/h, mph)
270.023/005/005
O-ring for log sending unit / blind plug (1x)
N05 800 374
TROUBLESHOOTING / MAINTENANCE
