Filter operating hour counter
The operating hour counter of the
grease filter is set at the factory to a
certain number of operating hours. This
time can be altered as required.
When the pre-set time has elapsed, the
control lamp above the grease filter
switch comes on. The grease filter
should then be cleaned.
The operating hour counter must then
be re-set to the time previously se-
lected when the filter was last used.
Press the grease filter switch for ap-
prox. 4 seconds.
The control lamp will go off.
Checking the operating hour counter
The percentage of operating hours in
which the filter has already been used
in relation to the time set in the opera-
ting hour counter can be displayed as
follows:
Switch the fan on using the On/Off
switch.
Press the grease filter switch.
The number of control lamps flashing
on the –/+ switch indicates the percent-
age of operating hours in which the fil-
ter has already been used in relation to
the number set in the operating hour
counter:
1 lamp = 25 %
2 lamps = 50 %
3 lamps = 75 %
4 lamps = 100 %
The number of operating hours for
which the filter has already been used
is stored in the event of mains failure.
Operation
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