Kärcher SB MU 908 Originalbetriebsanleitung Seite 67

Fault Possible cause
All coin acceptors Main switch is switched off.
reject all coins
Incorrectly adjusted time of day or operating
times. Night operation lock active
Motor protection switch of the high pressure
pumps was triggered
A single coin ac- Coin acceptor dirty
ceptor rejects all
coins
Overcurrent on the high pressure pump
Fault Possible cause
Irregular water jet High-pressure nozzle clogged
on the hand spray
Amount of water supply is too low.
gun
Suction hose kinked
Reduced pressure High-pressure nozzle flushed
at the high-pres-
Incorrect high pressure nozzle installed.
sure pump
Amount of water supply is too low.
Pressure does not High-pressure hose to the washdown yard leak-
build up in the ing
pump
Overflow valve misadjusted or leaking
The high pressure pump sucks air from the
empty detergent tank
High pressure High pressure pump is sucking in air.
pump is knocking;
manometer is
swaying wildly
Vibration dampener is defective
Valve in pump head defective or contaminated.Replace defective valves.
The pump does not Overcurrent on the high pressure pump
run
Fault Possible cause
Inadequate or no Filter or hose is blocked
flow of detergent
Leaky detergent hose
Dosing pump incorrectly adjusted or defective. Check the dosing pump and the setting.
Dosing pump obstructed by condensate.
Malfunctions at coin mechanism
Remedy
Set main switch to "1".
Check the adjustments on the control.
Reset motor protection switch.
Determine the cause if it reoccurs.
Clean the coin acceptor (see section „Maintenance
work")
Acknowledge the fault on the control.
Faults on high pressure pumps
Remedy
Clean high-pressure nozzle.
Check water supply level (refer to technical data). Operator
Check suction hose.
Replace the high-pressure nozzle.
Check/replace high-pressure nozzle.
Check water supply level (refer to technical data). Operator
Check flushing solenoid valve,swimmer valve and
water quality solenoid valve.
Check the high-pressure line, replace if necessary.Operator, Cus-
Check and repair the overflow valve.
Refill detergent. Bleed the suction line (to speed up
the bleeding process briefly squeeze the suction
hose to the pump repeatedly during operation).
Check suction pipes for water and detergent and
ensure that they are leak-proof.
Detergent container empty? (see above)
Replace vibration dampener.
Acknowledge the fault on the control.
Disturbed detergent supply
Remedy
Clean the parts.
Replace the hose
Drain the condensate from the pressure container
of the compressor.
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