Karcher K 3.740 manuel dutilisation Troubleshooting, Symptom Cause Solution

TROUBLESHOOTING

￿ CAUTION	Disconnect the machine from the pow-
	er source before making any repair.
Symptom	Cause	Solution
Motor will not start	On/Off switch is in the “OFF”	Turn switch to the “ON” (I) posi-
	(0) position.	tion
	Power cord is not plugged in.	Plug in power cord.
	Electrical outlet does not	Try a different outlet.
	supply adequate power.
	Tripped GFCI plug.	Press “RESET” button on GFCI
		plug.
	Tripped circuit breaker.	Switch off pressure washer.
		The reset comes automatically
		once the temperature of the
		unit drops.
Unit does not	Diameter of garden hose is	Replace with a 5/8 inch or larg-
reach high pres-	too small.	er garden hose.
sure.
	Water supply is restricted.	Check garden hose for kinks,
		leaks and blockage.
	Not enough inlet water sup-	Open water source full force.
	ply.
	Water inlet filter is clogged.	Remove filter and rinse out in
		warm water.
	Spray wand is on low pres-	Turn spray wand to high pres-
	sure position.	sure position.
Output pressure	Not enough inlet water sup-	Turn water on full force. Check
varies high and	ply.	garden hose for kinks, leaks or
low.		blockage.
	Pump is sucking air.	Check that hoses and fittings
		are air tight. Turn off machine
		and purge pump by squeezing
		trigger gun until a steady flow of
		water emerges through the
		nozzle.
	Water inlet filter is clogged.	Remove filter and rinse out in
		warm water.
	Discharge nozzle is obstruct-	Blow out or remove debris with
	ed.	a fine needle.
	Calcified gun, hose or spray	Run distilled vinegar through
	wand.	detergent suction tube.

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