Ferm 91
Iagttag altid sikkerhedsinstruktionerne og gældende bestemmelser.
Fig. D
Hold maskinen godt fast og tryk boret i arbejdsemnet med et jævnt tryk. Der må ikke bruges
magt på maskinen.
Brug kun bor, der ikke viser tegn på slitage. Slidte bor påvirker maskinens effekt negativt.
Indstilling af omdrejningshastigheden
Maskinen kan indstilles på to omdrejningshastigheder.
• Til langsom boring eller, når der skal skrues skruer i eller ud, indstilles knappen til
omdrejningshastighed (4) på 'lo'.
• For hurtig boring sættes knappen på 'hi'.
Der må ikke skiftes om, mens motoren kører!
Indstilling af moment
Maskinen har forskellige momentindstillinger, så momentkraften kan justeres, når der skrues
skruer i og ud.
• Sæt ringen til momentindstilling (5) på det ønskede moment.
• Man bør vælge den laveste indstilling, når der skrues. Vælg en højere indstilling, hvis
motoren glider.
Sådan skrues skrueri og ud
• Sæt knappen til rotationsretning (1) i position 'R' for at skrue skruer i.
• Sæt knappen til rotationsretning (1) i position 'L' for at skrue skruer ud.
Boring
• Sæt ringen til momentindstilling (5) i position bor.
Sørg for, at knappen til rotationsretning (1) altid er i position 'R', når der skal bores.
Slagboring
Vælg et egnet bor til arbejdet.
• Når der skal bores i bløde materialer som træ eller plastic, drejes hammer/bor-knappen (6)
med uret, indtil indikatoren er ud for symbolet ‘BOR’. Brug et metalbor.
• Skal der bores i hårdt materiale som sten eller beton, drejes knappen mod uret, til
indikatoren er ud for symbolet ‘HAMMER’. Brug her et bor med hårdmetalskær.
4. FUNKTION
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10 Ferm
Discharging the battery
Not only charging batteries is important, discharging is of equal importance or
even greater importance.
• When the battery is charged the cordless drill has to be used until you start noticing that
the power of the drill is diminishing and that the maximum rotational speed is not reached.
• The battery is almost discharged now. Only now you can start charging the battery.
• Charging the battery while it is still charged for say one-third of capacity, the so-called
‘memory effect’ can occur. Since during charging only the discharged part of the battery
capacity of the battery is being charged now, the battery can start crystallizing in the one-
third that is still charged. This part of the battery capacity can never be used afterwards.
• Do not discharge the battery to the minimum. As soon as you notice that the power or the
maximum rotational speed is diminishing, you have to charge the battery. When you
proceed using the drill and the battery becomes fully discharged, the so-called ‘switch of
poles effect’ can occur. The polarity of the battery poles will be switched: the ‘+’will
become ‘-‘ and the ‘-‘ will become the ‘+’. Once this has occurred the polarity will remain
switched during loading and this will damage the battery irreparable.
When the cordless drill is not being used over a longer period of time, the battery
has to be charged fully first. The battery has to be stored in charged condition.
The machines have been designed to operate over a long period of time with a minimum of
maintenance. Continuous satisfactory operation depends upon proper machine care and
regular cleaning.
Cleaning
Keep the ventilation slots of the machine clean to prevent overheating of the motor. Regularly
clean the machine housing with a soft cloth, preferably after each use. Keep the ventilation
slots free from dust and dirt. If the dirt does not come off use a soft cloth moistened with soapy
water. Never use solvents such as petrol, alcohol, ammonia water, etc. These solvents may
damage the plastic parts.
Lubrication
The machine requires no additional lubrication.
Faults
Should a fault occur, e.g. after wear of a part, please contact the service address on the
warranty card. In the back of this manual you find an exploded view showing the parts that can
be ordered.
5. MAINTENANCE
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