Troubleshooting - Bosch AQT 33-11 Original Instructions Manual

OBJ_BUCH-2334-003.book Page 17 Thursday, March 16, 2017 9:28 AM

Troubleshooting

Problem
Motor refuses to start
Motor stops
Fuses blow
Motor starts but no pressure
Motor "sounds" but fails to start
Pressure pulsating
Pressure too low, but steady
Note: Several types of accessory will nor-
mally deliver a lower pressure
Motor starts up but with restricted or no
working pressure
The pressure washer starts irregularly by
itself
Water leaks from machine
No detergent taken in
Bosch Power Tools
Possible Cause
Plug not connected
Mains socket faulty
Fuse faulty/blown
Extension cable damaged
Motor protector has activated
Frozen
Fuse faulty/blown
Wrong mains voltage
Motor protector has activated
Fuses incorrectly rated
Nozzle partly blocked
Insufficient power supply
Voltage loss due to use of extension cable Check characteristics of extension cable
Appliance not used for a long period of
time
Problems with TSS (Total Stop System)
device
Air in the inlet water supply hose/pump
Inadequate water supply
Water filter blocked
Water supply hoses squeezed
High pressure hose too long
Nozzle worn
Start/stop valve worn
No water supply
Water filter clogged up
Nozzle clogged up
Pump/spray gun leaky
Leaking pump
Detergent too dense
Residue or restriction in cleaning-agent
nozzle
English | 17
Corrective Action
Connect plug
Use another socket
Replace fuse
Try without extension cable
Allow to cool for 15 minutes
Wait for pump/water supply hose/acces-
sory to thaw
Replace fuse
Check that mains voltage corresponds to
specifications on the model tag
Allow to cool for 15 minutes
Change to a mains supply higher than the
pressure washer amp consumption
Clean nozzle
Check that the voltage of the mains pow-
er supply line is the same as that on the
plate
Contact your Bosch Service Centre
Contact your Bosch Service Centre
Allow pressure washer to run with open
spray handle and nozzle at low pressure
until regular working pressure is obtained
Check that the water supply corresponds
to specifications. The minimum specifica-
tion for the water supply hose is 1/2" or
13 mm diameter
Clean water filter
Straighten out kinked water supply hoses
Remove high pressure extension hose.
Retry (extension hose max. 7 m)
Change the nozzle
Activate trigger five times in quick suc-
cession
Connect water supply
Clean the water filter
Clean nozzle
Contact your Bosch Service Centre
A slight water leak is permissible; in case
of excessive leak, contact Bosch Service
Centre
Dilute with water
Flush with clean water and eliminate any
restrictions. If the problem persists, con-
tact your Bosch Service Centre.
F 016 L81 709 | (16.3.17)