Scheppach HS720 Originalbetriebsanleitung Seite 93

21. Storage
• Store the device and its accessories in a dark, dry
and frost-free place that is inaccessible to children.
• Store the machine in the transport position.
• The optimum storage temperature lies between 5
and 30 ˚C.
• Cover the tool to protect it from dust or moisture.
• Store the operating manual with the tool.
22. Troubleshooting
Important note in the case of repairs:
For return delivery of the device for repair, please ensure for safety reasons that it is free of oil and fuel when it is sent to
the service centre.
Fault
The saw does not brake 1. Mechanical brake is defective.
when switching the
machine off.
Saw blade is loose after 1. Fixing nut not tight enough.
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
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 engine or
4. Motor or switch faulty.
Incorrect motor rotation 1. Capacitor defective.
direction. 2. Incorrect polarity /
Motor not supplying 1. Cross section of the extension
power, fuse tripping.
2. Overload due to blunt saw blade.
Possible cause
system.
switch not OK.
Incorrect connection
lead insufficient.
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Remedy
1. Have the brake replaced.
1. Tighten fixing nut; right-hand thread (90Nm).
1. Sharpen saw blade (by a specialist).
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.
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