Troubleshooting - Kärcher HD 7/16-4 ST Manual

Maintenance contract
In order to guarantee a reliable operation
og the equipment, we success, you signed
a maintenance agreement. Please refer to
you local Kärcher service department.
Maintenance Works
Who may perform maintenance?
 Operator
Work designated with the sign "Opera-
tor" may only be carried out by persons
who have been instructed in the safe
operation and maintenance on the high
pressure plant.
 Electricians
Only persons with a professional train-
ing in the electro-technical area.
 Customer Service
Work designated with the sign "Cus-
tomer Service" may only be done by the
fitters of Kärcher Customer Service.
Oil change
WARNING
Risk of burns due to hot oil or hot parts of
the plant. Allow the pump to cool down for
minutes before oil change.
Note:
Used oil must only be disposed of by the
designated collection points. Please turn in
used oil there. Polluting the environment
with used oil is prosecutable.
For oil type refer to technical specifica-
tions.
1 Oil tank
2 Oil drain screw
 Place the collection trough under the oil
drain screw.
 Remove the lid of the oil container.
 Unscrew the oil drain screw and collect
oil.
 Fix in the oil drain screw and tighten it.
 Slowly fill in new oil until the "MAX"
marking on the oil container.
 Attach the lid of the oil container.
 Dispose of old oil ecologically or turn it
in at a collection point.
Descaling
Calcium deposits can lead to:
– higher pipe resistances
– even to failure of the components with
heavy calcium deposits
DANGER
– Risk of explosion due to combustible
gases! Smoking strictly prohibited dur-
ing decalcification. Ensure proper ven-
tilation.
24
– Risk of chemical burns on account of
acid! Wear protective glasses and pro-
tective gloves.
Note:
– Follow the specifications of the accident
prevention regulation BGV A1.
– Follow instructions for use on the lable
of the decalcifying agent.
According to statutory requirements, only
tested and approved boiler decrusting
agents may be used.
– RM 100 (Order No. 6.287-008) dis-
solves chalk and simple compounds of
chalk and detergents residues.
– RM 101 (Order No. 6.287-013) dis-
solves the deposits that cannot be dis-
solved using RM 100.
Note:
As an anti-corrosion measure and for neu-
tralising the acid residue, we recommend
that you finally pump an alkaline solution
through the machine (for e.g. RM 81) via
the detergent tank.
 First decalcify the swimmer tank.
 Shut off water supply.
 Remove the lid of the swimming tank.
 Remove the hose from the suction site
of the pump for the swimming tank on
the pump site.
 Seal the free end of the hose.
 Fill in 7 percent decalcification solution.
 Remove resin completely from the tank
after decalcification.
 Decalcify the high pressure installation:
 Remove the high pressure hose from
the network supply and hang it in the
swimmer tank.
 Run the calcium dissolving acid mixture
prepared in the tank through the instal-
lation's cycle, allow it to take effect,
rinse.
7
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EN

Troubleshooting

DANGER
Risk of electric shock.
Risk of injury! Switch off the power switch
with all maintenance and repair work.
Pull the mains plug and secure it against
being plugged in again
DANGER
Risk of injury on account of the emanating
water jet that could be hot!
DANGER
Risk of accident while working on the unit!
During all tasks:
– Close locking tap of fresh water.
– Let the hot parts of the plant cool down.
– Depressurise the plant by opening all
hand-spray guns.
Who may remedy faults?
 Operator
Work designated with the sign "Opera-
tor" may only be carried out by persons
who have been instructed in the safe
operation and maintenance on the high
pressure plant.
 Electricians
Only persons with a professional train-
ing in the electro-technical area.
 Customer Service
Work designated with the sign "Cus-
tomer Service" may only be done by the
fitters of Kärcher Customer Service.