Troubleshooting; Maintenance Of The Vdo Sumlog - VDO SUMLOG Manual

TROUBLESHOOTING / MAINTENANCE

Troubleshooting

Fault:
- No Sumlog function
- No Sumlog function
- Pointer stays at zero at speed
- Wrong indication

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)
Paddle wheel with shaft (30 and 50 kn, km/h, mph)
O-ring for log sending unit / blind plug (1x)
Cause and correction:
- Check electrical connections
per wiring diagram.
- Check supply voltage,
Supply voltage 10.8...32 VDC,
- Check fuses in fuse box.
- Check free movement of
paddle wheel,remove dirt de-
posits, replace paddle wheel
if necessary.
- Check paddle wheel shaft for
wear, replace paddle wheel if
necessary.
- Paddle wheel direction not
optimised,check installation.
- Recalibrate unit.
270.023/005/003
270.023/005/005
N05 800 374
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