12HDS 1000 DEVI. Trouble shootingFault Cause Remedy1. Engine does not run a)b)c)Fuel tank emptySpark plugOther causesCheck, fill up.See operating instructions, engineSee operating instructions, engine2. Unit does not comeup to pressurea)b)c)d)e)f)g)h)i)k)Pump is sucking in airStrainer at pump inlet blockedPump has not been bledPump or overflow valve defectiveSafety valve out of adjustmentInsufficient water supplyCleaning agent valve leaking,cleaning agent pump sucks in airStrainer in front of low waterprotection device dirtySafety valve leakingCleaning agent container emptyCheck water hoseOpen water inletClean strainerSwitch off unit, retract handgunlever, switch on unit with openedhandgun, if necessary repeatprocedure.Call in Customer ServiceCall in Customer ServiceOpen water tapCheck and sealDismantle strainer and clean itCall in Customer ServiceFill up cleaning agent container orset cleaning agent valve to “0”.3. Burner does notignite or flame goesout whilst unit inoperationa)b)c)d)e)f)g)No ignition spark (can beascertained through sight glassin burner cover)Burner fuel tank emptyFuel filter blockedInsufficient sputtering of the burnernozzleFuel pump or coupling defectiveLow water protection device doesnot operateThermostat defective or set too lowClean electrode and adjust electrodegap. Check ignition transformer andspark-plug connector.Top upDismantle and cleanDismantle filter and clean itDisassemble and replace damagedparts.Water supply not sufficient.Reed switch or magnetic pistonsdefective.Replace or set higher