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PROBLEM
WATER
TEMPERATURE
TOO HOT
DETERGENT NOT
DRAWING
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON INSTALLATION
22
TROUBLESHOOTING
POSSIBLE CAUSE
Incoming water to machine warm
or hot
Gas pressure too high
Detergent line sucking air
Defective high limit switch
Incorrect burner nozzle size
Insufficient water supplied
Restricted water flow
Air leak
Detergent metering valve packing
not tight or packing worn
Filter screen on detergent suction
hose plugged
Dried up detergent plugging
metering valve
High viscosity of detergent
Restriction behind float tank
screen removed
Hole in detergent line(s)
Strainer basket plugged
Connections on selector
valve loose
Detergent solenoid not opening
(where applicable)
Pump sucking air
Valves sticking
Unloader valve seat faulty
Nozzle incorrectly sized
Worn piston packing
8.913-939.0 • LANDA VNG • Rev. 5/11
SOLUTION
Lower incoming water temperature.
Call local gas company.
Tighten all clamps. Check detergent lines for holes.
Replace.
See exploded view parts list.
Check water G.P.M. to machine.
Check nozzle for obstruction, proper size.
Tighten all clamps.Check detergent lines for holes.
Tighten nut. Replace valve or packing.
Clean or replace.
Disassemble and clean thoroughly.
Dilute detergent to specifications.
Install restriction.
Repair hole.
Remove and clean.
Put teflon tape on all pipe connections.
Check flow switch, replace detergent solenoid.
Check water supply and possibility of air seepage.
Check and clean or replace if necessary.
Check and replace if necessary.
Check and replace if necessary (see serial plate
for proper size).
Check and replace if necessary.
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