Troubleshooting - Landa ENG Series Operator's Manual

Maintenance

Troubleshooting

PROBLEM
Incoming water to machine warm or hot
Gas pressure too high
Detergent line sucking air
WATER
TEMPERATURE
Defective high limit switch
TOO HOT
Incorrect burner nozzle size
Insufficient water supplied
Restricted water flow
Oil seal worn
PRESENCE OF
WATER IN OIL
High humidity in air
WATER
Piston packing worn
DRIPPING
FROM UNDER
O-Ring plunger retainer worn
PUMP
Air leakTighten all clamps.
Detergent metering valve packing not tight or
packing worn
Filter screen on detergent suction hose
plugged
Dried up detergent plugging metering valve
DETERGENT
High viscosity of detergent
NOT
Restriction behind float tank screen
DRAWING
removed
Hole in detergent line(s)
Strainer basket plugged
Connections on selector valve loose
Detergent solenoid not opening
(where applicable)
Pump sucking air
PUMP
Valves sticking
RUNNING
NORMALLY
Unloader valve seat faulty
BUT PRESSURE
Nozzle incorrectly sized
LOW ON
INSTALLATION
Worn piston packing
Valves worn
Blockage in valve
FLUCTUATING
PRESSURE
Pump sucking air
Worn piston packing
Air in suction line
Broken or weak inlet or discharge valve
PUMP NOISY
springs
Excessive matter in valves
Worn bearings
32
POSSIBLE CAUSE
Landa ENG Operator's 9.801-511.0 - F
SOLUTION
Lower incoming water temperature.
See specifications for proper gas pressure.
Tighten all clamps. Check detergent lines for
holes.
Replace.
See serial plate.
Check water GPM to machine.
Check nozzle for obstruction, proper size.
Check and replace if necessary.
Check and change oil twice as often.
Check and replace if necessary.
Check and replace if necessary.
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.
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.
Check and replace if necessary.
Check and replace if necessary.
Check water supply and air seepage at joints
in suction line.
Check and replace if necessary.
Check water supply and connections on
suction line.
Check and replace if necessary.
Check and clean if necessary.
Check and replace if necessary.