Kärcher CW 3 - Undisplayed Faults and Rectification; Diagnosing and Resolving Non-Displayed Faults

44 English
Faults that are not displayed
Fault Cause Rectification Person responsible
Inadequate cleaning efficien-
cy
No cleaning agent or insufficient
cleaning agent
No air pressure or insufficient air
pressure in the supply line
Worn brushes
 Check the cleaning agent filling level and
refill if necessary, vent the dosing pump.
 Check the air pressure and adjust if nec-
essary (0.6 MPa (6 bar) at the mainte-
nance unit pressure gauge).
 Clean the cleaning agent intake filter,
check the cleaning agent pipes for dam-
age.
 Check the brushes and replace if neces-
sary.
Operator
High-pressure pump does
not reach pressure
Suction-side pipeline system leak-
ing.
Water shortage
 Check the screw connections and hos-
es.
 Eliminate water shortage.
Operator, Customer
Service
The pressure gauge pointer
of the high-pressure pump vi-
brates strongly
Pump sucking air
Pressure tank defective
 Check suction line.
 Replace pressure tank.
Customer Service
The high-pressure pump
safety valve opens
Clogged washing bay nozzles  Check, clean, replace nozzles. Operator
Hose or high-pressure valves
clogged
 Remove clog. Customer Service
Too little water or no water
coming out of the nozzles
Dirt trap clogged
Insufficient water pressure
Nozzle clogged
Air in the centrifugal pump
Solenoid valve or supply line
clogged
 Clean the dirt trap
 Check the water supply pressure and
pumps
 Clean the nozzles with compressed air
 Venting the centrifugal pump by loosen-
ing the bleed screw
 Check the solenoid valves and supply
lines (water and electricity) and repair if
necessary
Operator
Water continues coming out
of the nozzles after washing
Dirty solenoid valve  Clean the solenoid valves Customer Service
Inadequate drying Too little or too much drying aid
Incorrect drying aid
No air pressure or inadequate air
pressure
 Increase or reduce the dosage
 Check the cleaning agent filling level
 Clean the intake filter
 Vent the dosing pump
 Use original drying aid from Kärcher
 Check that the drying blower is working
correctly
Operator
The wheel washing brush
does not rotate
T
he motor circuit breaker in the
control cabinet has triggered
Contact pressure too high
 Check the motor circuit breaker in the
control cabinet
 Reduce the contact pressure at the
wheel wash pressure reducer
Operator
The wheel washing brush ex-
tends slowly or not at all
No air pressure or inadequate air
pressure
 Check the air pressure and adjust if nec-
essary
 Increase the contact pressure at the
wheel wash pressure reducer
Operator, Customer
Service
The wheel washing brush ex-
tends at the wrong position
Dirty light sensors  Clean the light sensors and check the
settings if necessary
Operator
The brushes become dirty
quickly
Shampoo dosage too low  Adjust the shampoo dosage
 Check the water volume and adjust if
necessary
Operator
The undercarriage wash noz-
zle pipes pivot too slowly/too
quickly or not at all
No air pressure or inadequate air
pressure
Pivoting unit heavily soiled
Chokes incorrectly adjusted
 Check the air pressure in the supply line
and adjust if necessary
 Clean the pivoting unit
 Re-adjust the chokes
Operator, Customer
Service
The system cannot be
switched on
Power supply fault  Ensure a fault-free power supply as
specified in the connection values
Operator, qualified
electrician