8.913-939.0 • LANDA VNG • Rev. 5/11
PRESSURE WASHER Troubleshooting Guide
22
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
WATER
TEMPERATURE
TOO HOT
Incoming water to machine warm
or hot
Lower incoming water temperature.
Gas pressure too high Call local gas company.
Detergent line sucking air Tighten all clamps. Check detergent lines for holes.
Defective high limit switch Replace.
Incorrect burner nozzle size See exploded view parts list.
Insufficient water supplied Check water G.P.M. to machine.
Restricted water flow Check nozzle for obstruction, proper size.
DETERGENT NOT
DRAWING
Air leak Tighten all clamps.Check detergent lines for holes.
Detergent metering valve packing
not tight or packing worn
Tighten nut. Replace valve or packing.
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.
Restriction behind float tank
screen removed
Install restriction.
Hole in detergent line(s) Repair hole.
Strainer basket plugged Remove and clean.
Connections on selector
valve loose
Put teflon tape on all pipe connections.
Detergent solenoid not opening
(where applicable)
Check flow switch, replace detergent solenoid.
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.
To Next Page
Loading...
