HOT SERIES PRESSURE WASHER
OPERATOR’S MANUAL
25
TROUBLESHOOTING
LANDA HOT • 96-626 • REV. 2/04
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. Retape leaks
with teflon tape.
Faulty or misadjusted 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.