Kärcher HD 20/15-4 Service Manual

Also see for HD 16/15-4: Manual

Kärcher HD 20/15-4 Service Manual Manual pdf 19 page image

English 5.906-494.0 Rev. 01 (04/11) 19Operation with gentle start In appliances with gentle start, the trailing must beactive. When the pressure switch is opened, the pumpwill shut off with a 30 second delay. DIP switch 2: ON = trailing active, OFF = trailing off Switch the appliance off and back on to delete afault display. Connect the indicator lamp. Use a wire jumper on terminals 3 + 4. Use a wire jumper on terminals 5 + 6. Connect a contactor coil to terminals 7 + 8. Connect voltage (24V~) to terminals 9 + 10. Switch on the voltage supply.The contactor must react the indicator lamp mustglow green.The appliance is equipped with gentle start electron-ics.Soft start increases the motor speed gradually to1,400 1/min and protects the circuit from overloadswhen switched onThe electronics can only be replaced as one com-plete unit. Prior to the replacement, check the cableconnections, connected components and fuses.A Phase indicatorB Phase indicatorC Voltage supply 24VD Connection releaseE Display "On" lights up for voltage supply of 24V,display "Run" lights up after the motor has beenstarted.Possible reasons for malfunctions of the gentlestart electronics: Overvoltage of the voltage supply (more than 27V) Multiple motor starts per minute (30 seconds oftrailing control of the motor protection electronicsis not active). Corrosion and/or moisture in the components. Check whether both phases are present. Check if the voltage supply (24V~) is present. Jump the release on X1 5/6 (D top of image). LED "RUN" on the circuit board lights up after 1 -2 seconds.1 Fastener2 Disc Pull out the safety bow of the traction relief. Loosen the disc. Take out the traction relief from the holder. Disconnect the mains cable. Assemble it back in the reverse sequence. The disc must be under the safety bow.The illustration might differ from the gun on yourmodel, however, the procedure is still the same.1 Connection of high pressure hose2 Hand lever3 Gun4 Power press regulator5 Hand guide6 Spray pipe (stainless steel)7 Nozzle5.5.5 Simple function test of the motor protectionelectronics without appliance5.5.6 Gentle start electronics5.5.7 Simple function test of the gentle start elec-tronics inside the appliance5.5.8 Replacing the mains cable5.6 Gun and spray pipe HD 20/15-4 and 20/15-4