Landa HOT 2-1100, Service Manual

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HOT SERVICE MANUAL • 8.917-210.0 • Rev. 09/17A
PRESSURE WASHER Troubleshooting Guide
2
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE
Faulty pressure gauge Install new gauge.
Insufficient
water supply Use larger garden hose;
clean filter washer at water inlet.
Old, worn or incorrect
spray nozzle Match nozzle number to machine
and/or replace with new nozzle.
Plumbing
or hose leak Check plumbing system for leaks.
Re-tape leaks with teflon tape.
Faulty or mis-adjusted
unloader valve (Where applicable) Adjust unloader for proper pressure.
Install repair kit when needed.
Worn packing in pump Install new packing kit.
Fouled or dirty inlet
or discharge valves in pump Clean inlet and
discharge valves.
Worn inlet or discharge valves Replace with valve kit.
LOW WATER
TEMPERATURE
Soot buildup on coils
not allowing heat transfer Clean
coils.
Lime deposits on inside of coil Delime coil.
WATER
TEMPERATURE
TOO HOT
Defective high limit switch Replace.
Insufficient water supplied Check water G.P.M. to machine.
Restricted water flow Check nozzle for proper size or obstruction.
DETERGENT
NOT
DRAWING
Air leak Tighten all clamps. Check
detergent lines for holes.
Valve in the injector head may
be blocked, dirty or damaged Clean or replace
valve in injector.
Filter screen on detergent
suction hose plugged Clean
or replace.
Dried up detergent
plugging metering valve Disassemble and
clean thoroughly.
High viscosity of detergent Dilute detergent to specifications.
Hole in detergent line(s) Repair hole.
Low detergent level Add detergent, if needed.
Variable pressure
control handle set
for high pressure Turn variable pressure control
handle to allow water to flow
out of brass soap nozzle.
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON INSTALLATION
Pump
sucking air Check water supply and
possibility of air seepage.
Valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
Nozzle
incorrectly sized Check and replace if necessary
(See serial plate for proper size).
Worn piston packing Check and replace if necessary.