![background image](http://html2.mh-extra.com/html/karcher/hd-1090/hd-1090_service-handbook_3833971020.webp)
18
Troubleshooting and basic settings
Unit does not reach required pressure
Disassemble changeover nozzle
Pull out water inlet strainer
Check water supply quantity
Insufficient water supply
– The water inlet hose must be at least 3/4 inch
in diameter.
– Check the water inlet quantity (see technical
data).
Water inlet strainer blocked
– Pull out the water inlet strainer with pliers and
clean. Replace if necessary.
High-pressure nozzle insert washed out
– Disassemble the changeover nozzle. If ne-
cessary replace the nozzle inserts.
Note:
If the nozzle insert is washed out, the unit
cannot build up the full operating pressure.
12
11
10
9
8
7
6
5
4
3
2
1
1
o
Summary of Contents for HD 1090
Page 1: ...HD 1090 Service Handbook 0 I 5 905 212 03 02...
Page 4: ...2 Unit function Equipment 10 15 12 9 10 13 11 14 16 1 8 2 3 4 5 6 7 0 I...
Page 6: ...4 Unit function Functional diagram 5 3 7 8 9 10 11 12 13 14 2 1 15 16 17 4 6...
Page 8: ...6 Unit function Pump 15 17 18 10 12 13 11 14 16 20 9 12 11 1 8 2 3 4 5 6 7 11 19 21...
Page 10: ...8 Unit function Pressure and flow control with the Servopress handgun 1 2 4 3...
Page 14: ...12 Unit function Handgun with pressure and flow control Servopress with low effort version...