Karcher K 3.91 M - Manual (Page 16)

16
English
ƽ
CAUTION Disconnect the machine from the power
source before making any repair.
TROUBLESHOOTING
Symptom Cause Solution
Motor will not start On/Off switch is in the “OFF”
(O) position.
Turn switch to the “ON” (I) posi-
tion
Power cord is not plugged in. Plug in power cord.
Electrical outlet does not sup-
ply adequate power.
Try a different outlet.
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
reach high pres-
sure. Diameter of garden hose is
too small. Replace with a 5/8 inch or larg-
er garden hose.
Water supply is restricted. Check garden hose for kinks,
leaks and blockage.
Not enough inlet water sup-
ply. Open water source full force.
Water inlet filter is clogged. Remove filter and rinse out in
warm water.
Spray wand is on low pres-
sure position. Turn spray wand to high pres-
sure position.
Output pressure
varies high and
low. Not enough inlet water sup-
ply. Turn water on full force. Check
garden hose for kinks, leaks or
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-
ed. Blow out or remove debris with
a fine needle.
Calcified gun, hose or spray
wand. Run distilled vinegar through
detergent suction tube.