Landa VNG8-3000 - Troubleshooting - Pressure & Temperature; Low Operating Pressure & Water Temp

8.913-939.0 • LANDA VNG • Rev. 5/11
21
PRESSURE WASHER Troubleshooting Guide
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.
Belt slippage Tighten or replace; use correct belt.
Plumbing or hose leak Check plumbing.
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.
Obstruction in spray nozzle Remove obstruction.
Leaking pressure control valve
(where applicable)
Rebuild or replace as needed.
Detergent metering valve left open
sucking air, or faulty metering valve
Close and/or replace metering valve.
Slow motor RPM Check incoming voltage.
LOW WATER
TEMPERATURE
Improper size of gas lines See pages 7-8 for sizing of gas lines.
Low gas pressure Increase gas pressure to machine.
Improper pressure regulator Specify BTU, building gas pressure and 11 w.c.i.
to machine for correct sizing of regulator.
Low gas valve pressure Increase gas pressure as described on page 14.
Soot buildup on coils not allowing
heat transfer
Clean coils.
Improper burner nozzle See exploded view parts list.