Brand: KÄRCHER
Category: Pressure Washer
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for K 7.20 MX
Uploaded: April 20, 2026, 8:09 p.m.
Warranty Information
In each country, the guarantee conditions issued by the responsible sales company are applicable.
Preparing the unit:
- Insert the power plug into the socket.
- Turn the master switch to "I".
Switching on:
- Press the safety button on the handgun and pull the lever.
Switching off:
- Release the lever.
- During breaks and when leaving the unit, secure it against inadvertent switching on by pressing the safety button.
Regulating pressure/flow rate:
- To increase pressure, twist the spray lance to "+".
- To reduce pressure, twist the spray lance to "-".
Adding cleaning agent:
- Fill the detergent reservoir with detergent tablet and water, or concentrate and water. Observe dosage recommendations.
- Meter cleaning agent using the valve: center-position for medium, "+" for large, "-" for small quantities.
- Twist spray lance to "-" to the stop.
Recommended cleaning method:
- Spray cleaning agent sparingly on the dry surface and let it react (do not let it dry).
- Rinse off loosened dirt with the high-pressure jet.
Finishing operations:
- Switch master switch to "0".
- Pull out the power plug.
Troubleshooting and error codes
| Fault | Cause | Remedy |
|---|---|---|
| Unit does not run | Power supply interrupted | Draw out power plug! Check power cord, power plug, extension cable and cable connections for damage. |
| Unit does not come up to pressure | Spray lance set to "-" | Set spray lance to "+". |
| In suction operation – unit not vented | Vent unit, see "Operation". | |
| Strainer in water inlet blocked | Clean strainer, see "Care and Maintenance". | |
| Water supply quantity too low | Check the water supply to the water inlet of the unit for leaks and throughput. | |
| Strong pressure fluctuations | High-pressure nozzle in spray lance blocked | Take off the spray lance, clean the hole in the high-pressure nozzle with a needle and rinse through with water again. |
| Water comes out of the housing underside | Pump leaking | 3 drops per minute are acceptable. For greater leakages contact the customer service. |
| Cleaning agent is not drawn in | Spray lance set to "+" | Set spray lance to "-". |
| Cleaning agent valve in the cleaning agent suction hose blocked | Clean cleaning agent metering valve, see "Care and Maintenance". |