Landa HOT 3-300, Operator'S Manual

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8.917-208.0 • HOT Operator Manual • Rev. 03/12
PRESSURE
W
ASHER
T
roub
leshooting Guide
16
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE Faulty pressure gauge Install new gauge.
Insuffi cient water supply Use larger garden hose; clean fi lter
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 tefl on 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.
Insuffi cient water supplied Check water G.P.M. to machine.
Restricted water fl ow Check nozzle for proper size or obstruc-
tion.
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 meter-
ing valve Disassemble and clean thoroughly.
High viscosity of detergent Dilute detergent to specifi cations.
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 fl ow 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 se-
rial plate for proper size).
Worn piston packing Check and replace if necessary.