Kärcher HDS 4.0/20-4 Ea Mode D'emploi page 14

PREVENTIVE MAINTENANCE AND SERVICE
Oil change
• Ready a catch bin for appr. 0.26 gal/1 Liter oil.
• Loosen release screw.
Dispose of old oil ecologically or turn in at a gathering
point.
• Tighten release screw.
• Fill oil slowly up to the MAX marking.
Note: Air pockets must be able to leak out.
For oil type refer to technical specifications.
Proper Pump Care
• DO NOT pump acids.
• DO NOT allow pump to run dry.
• Winterize if storing in freezing temperatures, refer
to Storage for details.
• Use a water softener on the water system if known
to be high in mineral content.
• Use only high quality detergents and follow manufacturer's
mix recommendations.
• Flush the system with clear water immediately after
using detergent solutions.
• Clean filter screen on detergent inlet line periodically.
• Flush the pressure washer system with antifreeze
if storing for an extended period of time, refer to
Storage for details.
Unloader Valve
WARNING: The unloader valve on this pressure
washer has been factory set and sealed and is a field
nonadjustable part. Tampering with the factory setting
may cause personal injury and/or property damage,
and will void the manufacturer warranty.
Burner Fuel Filter
Drain any water which has accumulated in fuel filter and
clean or replace element as needed.
Heating Coil
Coil Descaling: In hard water areas, scale buildup within
the heating coil will occur. Scale deposits will decrease
the water temperature rise and may eventually clog the
heating coil. Contact your local service center when
descaling is needed.
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Coil Desooting: Poor grades of fuel oil or inadequate
combustion air will cause heavy soot buildup on the
outside surface of the heating coil. These deposits will
insulate the coil. This will restrict the air flow through the
coil, further aggravating the soot buildup. Contact your
local service center when desooting is needed.
Relief Valve
washer has been factory set and sealed and is a field
nonadjustable part. Tampering with the factory setting
may cause personal injury and/or property damage,
and will void the manufacturer warranty.
If pressure from pump or thermal expansion should exceed
safe limits, the relief valve will open, allowing high pressure
to be discharged through hose to ground.
Caution: Inspect relief valve annually for any
obstruction.
1. Indicator lamp rotation direction.
2. "Ready for use: indicator lamp
3. Fuel indicator lamp
4. Indicator lamp service
5. Indicator lamp system care
Risk of injury by inadvertent startup of appliance and
electrical shock.
First pull out the plug from the mains before carrying
out any tasks on the machine.
Indicator lamp rotation direction is blinking
Three-phase appliances (HDS 4.0/30-4 Ef & HDS 5.0/30-
4 Ef) only:
Exchange the poles at the appliance plug.
Operating Manual HDS Premium 9.808-215.0
WARNING: The relief valve on this pressure
TROUBLESHOOTING
1 2 3
4 5
DANGER