Berner 414274 Bedienungsanleitung Seite 6

PROBLEMS AND CAUSES
Symptom
Device loses power or does not
work
Reduced torque
Striking mechanism of device is
not working
The device starts up on its own
when the air supply is connected
Water escapes from the air outlet
of the device
Possible cause
1. Dirt in the motor
2. Not enough air pressure
3. Motor not oiled or rusty due
to lack of oil
4. Device has not been oiled
5. Worn bearings
1. Not enough lubrication
2. Pressure reducing valve
incorrectly set
3. Not enough air pressure in
the system
4. Striking mechanism worn
Striking mechanism is faulty
Extractor unit:
1. Valve is stuck
2. Rust in the tool balancer
3. Spring faulty or rusty
1. Water in the pressure tank
of the compressor
2. Water in the air hoses
Solution
1a. Oil the device with special air tool oil and
use this to clean the air tool motor
1b. Open the device and clean it
2. Check the compressor and air hoses, and
the setting on the pressure reducing valve
3. Oil the device as per the instructions
4. Replace the bearings
1. Lubricate the striking mechanism
2. Correctly set the pressure reducing valve
3. Check the compressed air system
4. Replace the striking mechanism
Replace the striking mechanism
Replace the extractor unit
1. Drain the pressure tank of the
compressor. Oil the device and allow to
run briefly
2a. Install a water separator
2b. Install an air drier
2c. Oil the device and allow to run briefly
EN