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New Unit Information 02.2004

HD 5/12

Troubleshooting

 Page 11 / 12

Troubleshooting

Fault

Solution

Unit not running

– Check/replace mains voltage, connection cable and mains
   fuse.
– Check/replace unit switch.
– Check/replace pressure switch.
– Check/replace overflow valve.
– Check/replace motor.

Unit does not become
pressurised

– Check/increase water inlet volume.
– Clean/replace water inlet strainer.
– Bleed unit.
– Check/replace high-pressure hose.
– Check cylinder head for leaks and replace as necessary.
– Check/replace overflow valve.

Unit constantly switches on

and off with handgun closed

– Check/replace handgun and o-rings at high-pressure hose
   for leaks.
– Check/replace cleaning agent non-return valve.
– Check/replace pressure/suction valves for leaks.
– Check/replace overflow valve.
– Check/replace non-return valve.
– Check/replace pressure switch.

Unit won't switch off when

the handgun is closed

– Check/replace overflow valve.
– Check/replace non-return valve.
– Check/replace pressure switch.

Cleaning agent is not drawn
in

– Clean/replace cleaning agent non-return valve.
– Check/replace cleaning agent nozzle.
– Replace injector.
– Clean/replace cleaning agent strainer.
– Check replace metering valve.

Water escapes between the
cylinder head and piston

housing

– Check replace high-pressure and low-pressure seals.

Oil escapes between the
cylinder head and piston
housing

– Replace the oil seals.

Содержание HD 5 12

Страница 1: ...New Unit Information New Unit Information 02 2004 HD 5 12 1 514 101 5 905 972...

Страница 2: ...nd suction valve made from stainless steel and plastic The pressure switch switches off the motor when the handgun is closed Injector Non return valve No safety valve No pressure gauge No pressure and...

Страница 3: ...e hose 2 Handgun 3 Mains connecting plug 4 Spray lance 5 Wheel 6 Triple nozzle 7 High pressure connection 8 Water connection with strainer 9 Inspection window for oil level 10 Front cover 11 Unit swit...

Страница 4: ...age 4 12 Rear view 1 Handle height adjustable 2 Rear cover 3 Cleaning agent supply hose with filter 4 Wheel 5 Mains connection cable 6 Wheel 7 Cleaning agent metering valve 8 Clamping screw for adjust...

Страница 5: ...aning agent hose 4 Mains connection cable 5 Cleaning agent connection with non return valve 6 High pressure connection View from the front cover removed 7 Overflow valve 8 Pressure switch 9 Water conn...

Страница 6: ...ation 02 2004 Unit functions HD 5 12 Page 6 12 Electrical box 1 Unit switch 2 Cover 3 Capacitor 4 Connection cable with motor Electrical box open Pull the retainer clips arrows outward and remove the...

Страница 7: ...s connection cable 6 Cleaning agent supply hose 7 Cleaning agent metering valve 4 5 7 6 Rear cover open Pull the retainer clips arrows outward and remove the cover 1 2 2 1 3 3 Note If the retaining cl...

Страница 8: ...nformation 02 2004 Unit functions HD 5 12 Page 8 12 View from below 6 1 2 1 High pressure connection 2 Pressure switch 3 Cylinder head bolt 4 Suction cover 5 Cylinder head 6 Water connection with stra...

Страница 9: ...on hose connection 4 High pressure seal 5 Low pressure seal 6 Oil seal 7 Piston 8 Swash plate with thrust ball bearing 9 Motor bearings 10 Shaft seal 1 2 3 6 10 18 19 20 11 Motor winding stator 12 Mag...

Страница 10: ...8 Injector 9 High pressure connection 10 Cylinder head Cylinder head 11 Connection bore pump pressure 12 Connection bore dynamic pressure 13 Screw plug 14 Connection bore to pressure switch only indi...

Страница 11: ...replace handgun and o rings at high pressure hose for leaks Check replace cleaning agent non return valve Check replace pressure suction valves for leaks Check replace overflow valve Check replace non...

Страница 12: ...Service Info Int l Circuit Diagram If required the operating instructions and the spare parts lists can be ordered as a paper copy from the spare parts service by quoting the relevant part number Spec...

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