19
Maintenance
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 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 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.
Landa HOT Series Operator’s Manual 8.917-208.0 - B
