Scheppach HS 720 Traduction Des Instructions D'origine page 32

21. Troubleshooting
Fault Possible cause
The saw does not 1. Mechanical brake is defective
brake when switching
the machine off
Saw blade is loose 1. Fixing nut not tight enough
after the motor is
switched off
Burnt areas on the 1. Blunt saw blade
cutting surface 2. Incorrect saw blade
Engine does not start 1. Spark plug cable unplugged.
2. No fuel or old fuel.
3. Choke not in open position.
4. Fuel line clogged.
5. Contaminated spark plug.
6. Engine flooded.
7. Engine oil level low
Engine runs erratically. 1. Spark plug cable loose.
2. Engine runs with CHOKE.
3. Fuel line clogged or old fuel.
4. Ventilation blocked.
5. Water or contamination in the fuel
system.
6. Contaminated air filter.
7. Incorrect carburettor setting.
Motor is overheated 1. Engine oil level low.
2. Contaminated air filter.
3. Airflow restricted.
4. Carburettor not adjusted correctly.
Engine does not start. 1. Mains fuse blown
2. Extension cable defective
3. Connection to the motor or switch
not OK
4. Motor or switch faulty
Incorrect motor rota- 1. Capacitor defective
tional direction 2. Incorrect polarity /
Incorrect connection
Motor not supplying 1. Cross section of the extension lead
power, fuse tripping insufficient.
2. Overload due to blunt saw blade
Burnt areas on the 1. Blunt saw blade
cutting surface 2. Incorrect saw blade
m Electrical maintenance work may only be carried out by a qualified electrician!
32 | GB
1. Have the brake replaced
1. Tighten fixing nut; right-hand thread
1. Sharpen, replace saw blade
2. Replace saw blade
1. Re-connect the spark plug cable to the spark plug.
2. Fill with clean, fresh petrol.
3. The throttle must be positioned in the choke posi-
tion during cold starting.
4. Clean the fuel line.
5. Clean, set gap or replace.
6. Wait a few minutes before restarting, but do not
allow the engine to prime.
7. The oil monitor prevents the engine from starting if
the oil level is too low; check the oil level.
1. Connect and fasten the spark plug cable.
2. Set the choker-arm to OFF.
3. Clean the fuel line. Fill the tank with clean, fresh
petrol.
4. Clean the de-aerator.
5. Empty the tank. Fill the tank with fresh fuel.
6. Clean or replace the air filter.
7. Contact the service department
1. Fill crankcase with correct oil.
2. Clean the air filter.
3. Remove and clean the housing.
4. Contact the service department
1. Check mains fuse.
2. Replace the extension lead.
3. Have this checked by an electrician.
4. Have this checked by an electrician.
1. Have this checked by an electrician
2. Change direction of rotation with phase inverter /
Have an electrician change the polarity of the wall
plug.
1. see "Electrical connection"
2. Replacing the saw blade
1. Sharpen/replace saw blade
2. Replace saw blade
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Remedy