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18 • F016 L70 374 • TMS • 28.09.05
The following table gives checks and actions that you can perform if your machine does not operate correctly.
If these do not identify/remedy the problem, contact your service agent.
Warning: Switch off and remove plug from mains before investigating fault.
Fault Finding
Symptom Possible Cause Remedy
Motor refuses to start Plug not connected
Mains socket faulty
Fuse faulty/blown
Extension cable damaged
Motor protector has activated
Frozen
Connect plug
Use another socket
Replace fuse
Try without extension cable
Allow to cool for 5 minutes
Wait for pump/water supply hose/ac-
cessory to thaw
Motor stops Fuse faulty/blown
Wrong mains voltage
Motor protector has activated
Replace fuse
Check that mains voltage corresponds
to specifications on the model tag
Allow to cool for 5 minutes
Fuses blow Fuses incorrectly rated Change to a mains supply higher than
the pressure washer amp consump-
tion
Excessive working pres-
sure
Nozzle partly blocked Clean nozzle
Pressure pulsating Air in the inlet water supply hose/pump
Inadequate water supply
Water strainer blocked
Water supply hoses squeezed
High pressure hose too long
Allow pressure washer to run with
open spray handle and nozzle at low
pressure until regular working pres-
sure is obtained.
Check that the water supply corre-
sponds to specifications. The mini-
mum specification for the water supply
hose is 1/2" or 13 mm diameter.
Clean water strainer
Straighten out kinked water supply
hoses
Dismount high pressure extension hose.
Retry (extension hose max. 10 m)
Pressure too low, but
steady
Note: Several types of ac-
cessory will normally de-
liver a lower pressure
Nozzle worn
Start/stop valve worn
Change the nozzle
Activate trigger five times in quick suc-
cession
Motor starts up but no
working pressure
No water supply
Water strainer clogged up
Nozzle clogged up
Connect water supply
Clean the water strainer
Clean nozzle
The pressure washer
starts irregularly by itself
Pump/power gun leaky Contact your Bosch Service Centre
Water leaks from ma-
chine
Leaking pump 6 drops per minute are permissible. In
case of more serious leakage, you
should contact your Bosch Service
Centre.
F016 L70 374 - GB Seite 6 Freitag, 21. Oktober 2005 9:57 09
18


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