-
6
You can enter into a maintenance contract with the con-
cerned Kaercher Sales Office for the machine.
The machine should be stored in frost-free rooms. In
case there is frosting risk, for e.g. if the machine is in-
stalled in open areas, then the machine must first be
emptied and flushed using an anti-freezing agent.
Screw off water supply hose and high pressure
hose.
Operate device for max. 1 minute until the pump
and conduits are empty.
Note:
Observe handling instructions of the anti-freeze
agent manufacturer.
Fill in normal anti-frost agents in the swimmer tank
right until the top.
Place the collection trough under the high pressure
exit.
Switch on the appliance and let it run until the safe-
ty mechanism against lack of water in swimmer
tank gets activated and the machine is switched
off.
A certain corrosion protection is achieved with this as
well.
DANGER
Risk of injury! The main switch is to be switched off
while carrying out any repairs or maintenance jobs.
Error number display of the control
–
When an error is triggered, the operation readiness
of the appliance is switched off and the pump is
shut down. The control lamp "collection error" will
blink in the pulse of the reported error number; or if
the water level is low or the winding protection con-
tact is triggered on the engine, the respective mes-
sage lamp will illuminate. In addition to this, the er-
ror number on the 7-segment display of the control
unit will be displayed.
–
If one of the above errors occurs, the appliance can
be restarted after the error has been corrected by
activating the release switch.
Care and maintenance
DANGER
Risk of injury! The main switch is to be switched off while carrying out any repairs or maintenance jobs.
Maintenance schedule
Time
Activity
Assembly affected
Performance
of whom
daily
Check hand-spray
gun
Hand spray gun
Check whether the hand-spray gun closes tightly without any
leaks. Check the protection mechanism against accidental
switching. Replace defective hand-spray guns.
Operator
Check high pressure
hoses
Outlets, hoses towards working machine Check hoses to see if there are damages. Replace defect hos-
es immediately. Danger of accident!
Operator
weekly or after 40 operat-
ing hours
Check the unit for
leaks
Entire plant
Check pumps, overflow valve and pipe system for leaks. In-
form Customer Service if there is oil below the pump or if there
is a leakage of more than 3 drops of water per minute. Keep
the leakage borings clear.
Operator/Custom-
er service
Check oil level
Oil level indicator on the pump
If the oil is milky, it needs to be replaced.
Operator
Check oil level
Oil level indicator on the pump
Check oil level of the pump. Refill oil if required (Order no.
6.288-016)
Operator
monthly or after 200 oper-
ating hours
Check pump
High-pressure pump
Check the pump for leaks. If the leakage is more than 3 drops
per minute, call Customer Service.
Operator
Check water scarcity
fuse
Swimmer switch in the swimmer tank
Press the swimmer of the low water fuse down for about 5 sec-
onds and control the error indicator on the control board. Re-
move deposits if necessary.
Operator
Test swimmer valve
Float tank
The water level must be 40 mm below the overflow. No water
must exit while the swimmer valve is closed.
Operator
Check overpump
time.
Controls
Close consumer loads (e.g. hand spray guns). The pump must
switch off after the afterrun period.
Operator
Test automatic start
Pressure sensor
The pump stands still as there is no water transfer. Open the
hand spray gun. If the pressure in the high-pressure cycle falls
below the switchpoint, the pump must switch on.
Operator
Tighten hose clips
All hose clips
Tighten the hose clips using a torque wrench. Tightening
torque up to a diameter of 28 mm = 2Nm, from 29 mm = 6 Nm.
Operator
half-yearly or after 500 op-
erating hours
Oil change
High-pressure pump
Drain off oil. Fill in 1 l of fresh oil (order no. 6.288-016.0). Check
the oil level at the oil level indicator.
Operator
half-yearly or after 1000
operating hours
Check the appliance
for calcium deposits
entire water system
Improper functioning of valves or pumps can be an indication
of calcium deposits. If necessary decalcify.
Operator trained
in decalcification
Tighten clamps
Control board
Tighten all clamps for components in the main circuit.
Electrician
Test swimmer valve
Float tank
The water level must be 40 mm below the overflow. No water
must exit while the swimmer valve is closed.
Customer Service
annual
Safety check
Entire plant
Safety check according to the guidelines for fluid spraying
equipment.
Technical expert
Maintenance contract
Frost protection
Drain water
Flush device with anti-freeze agent
Troubleshooting
Error num-
ber
Error description
01
Water shortage
02
Winding protection contact
03
Water temperature is too high
04
Leakage switch-off 1 (30 minutes of con-
tinuous operation).
05
Leakage switch-off 2 (minor leakage)
06
Pressure sensor does not transmit signal
07
Temperature sensor does not transmit
signal
08
ON switch continuously activated
17
EN
Summary of Contents for HDC 20/16
Page 2: ...2 ...