Troubleshooting - Kärcher HDI 38/12 Bedienungsanleitung

DANGER
Risk of injury! The main switch is to be
switched off with all repair work.
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.
Fault
Full pressure does not build up
in the high pressure pump
High pressure pump is knock-
ing; manometer is swaying wild-
ly
Overflow volume is exhausted
into the atmosphere, or safety
valve is triggered
In spite of full volume transfer,
water flows back into the swim-
mer tank.
High pressure pump does not
reach speed with star/delta
startup
No steam generation in connec-
tion with the hot water generator
HWE 4000
Detergent is not getting sucked
in
26

Troubleshooting

 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.
Possible cause
Suction site pipe leaking.
Water shortage
Valve in the pump defective, high-
pressure solenoid valve does not
close.
Sieve in the dirt catcher is dirty
Advance pressure too low in the
swimmer tank.
Pump is sucking air.
Pressure tank is defect
Valve plate or valve spring is defec-
tive.
Advance pump calcified or defec-
tive.
Hose between volume control and
swimmer tank burst.
Flow regulator defective.
System calcified.
Spray unit plugged.
Flow regulator defective.
Ball valve combination of the start/
delta startup defective.
Solenoid valve of the start/delta
startup defective.
No compressed air supply on the
rotary drive.
Ball valve combination of steam
stage defective.
Solenoid valve of steam stage de-
fective.
No compressed air supply on the
rotary drive.
Dosing valve for detergent supply
defective.
Shut-off valve of the detergent dos-
ing defective.
Solenoid valve for detergent supply
defective.
No compressed air supply on the
rotary drive.
Filter at the detergent suction hose
dirty
Remedy
Check screw fittings and hoses.
Ascertain cause and rectify it.
Replace defective components.
See section "Clean sieve".
Increase the fill level, clean the suction lines. Operator
Check suction system and remove leaks.
Replace pressure tank
Replace defective components.
Check advance pump.
Replace the hose.
Repair or replace the volume control.
Decalcify the system (see Care and Mainte-
nance).
Check nozzles.
Check volume control.
Repair or replace the ball valve combination. Customer Service
Replace solenoid valve.
Connect compressed air supply.
Repair or replace the ball valve combination. Customer Service
Replace solenoid valve.
Connect compressed air supply.
Replace the dosing valve.
Repair or replace the shut-off valve.
Replace solenoid valve.
Connect compressed air supply.
Clean filter at the detergent suck hose.
10
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EN
of whom
Operator
Operator
Customer Service
Operator
Operator
Operator
Customer Service
Operator
Operator
Customer Service
Operator
Operator
Customer Service
Customer Service
Operator
Customer Service
Operator
Customer Service
Customer Service
Customer Service
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Operator