Hardi ZENIT 400 Original Instruction Book

Contents

1037 - TroubleshootingFluid circuitFAULT PROBABLE CAUSE POSSIBLE SOLUTIONOn activating, the system doesn’t spray Air in the suction line. Check the suction filter o-ring.Check the suction tube and fittings.Check the assembly of the pump crankcase covers anddiaphragms.Air in the system. Prime the pump by filling the hose with waterSuction or pressure filters blocked. Clean the filtersCheck the suction fitting and make sure that it is not too close tothe outlet on the tank floor.Loss of pressure Incorrect assembly The safety valve’s spring is damaged.The suction fitting is blockedThe suction filter is cloggedPump valves clogged or worn Check for obstructions and wearDefective pressure gauge Check for dirt in the intakePressure jumps Filters clogged Clean the filters. Clean with clean water. If powdered product isbeing used, check that agitation is on.Worn nozzles Check that the air flow does not exceed 10%.Tank suction clogged Check the suction tubeAir suction Reduce revolutions in the PTOIncrease in pressure Pressure filters blocked Clean the filtersFoam formed Air in the circuit Check the o-rings, gaskets, hoses and suction fittingsExcessive agitation. Reduce revolutions in the PTOCheck the voltage of the safety valve of the self-cleaning filterMake sure that there is return to the tankUse anti-foaming agentLeak of pump liquid Diaphragms damaged ReplaceThe operating unit does not work Fuse blown Check the limit switches. Oil with lubricant if the limit switchdoes not make proper contact.Incorrect polarity Control box: Red - pos (+) Black - neg (-).Solenoid valves: Brown - pos (+). Blue - neg. (-).The valves do not close correctly. Check for obstructions in the valvesCheck the limit switchesNo power Incorrect polarity. Brown is pos. (+), Blue is neg. (-)Check the electric boardCheck that the fuse box makes contact with the bracket.