MAINTENANCE
64 © HAMM AG 2009
3.5 OPERATION MONITORING
(see also engine operating instructions)
3.5.1 Operation monitoring
When the electric system is switched on with
the key switch (310), all illuminated indicators
are activated for approx. 2 seconds for function
control purposes. Check whether all illuminat-
ed indicators are operable. Observe the control
and indication instruments from time to time. If
a illuminated indicator indicates a failure, de-
termine and remove the cause. You can find an
exact description of the elements in the operat-
ing instructions, section 2.1.3.
3.5.2 Dry air filter
The operability of the air filter is monitored by
an electric contamination indicator. Only if the
illuminated indicator (203) flashes must the air
filter cartridge be replaced (see maintenance
once every 10 operating hours).
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