Landa PDHW5-35624E Operator's Manual page 21

PROBLEM
OIL DRIPPING Oil seal worn
EXCESSIVE
VIBRATION IN Irregular functioning of the valves
DELIVERY LINE
DETERGENT Air leak
NOT DRAWING
Restrictor in float tank is missing
Filter screen on detergent
suction hose plugged
Dried up detergent
plugging metering valve
High viscosity of detergent
Hole in detergent line(s)
Low detergent level
PUMP RUNNING Pump sucking air
NORMALLY
Valves sticking
BUT PRESSURE
LOW ON
Nozzle incorrectly sized
INSTALLATION
Unloader valve seat faulty
Worn piston packing
BURNER MOTOR Fuel pump seized
WILL NOT RUN
Burner fan loose or misaligned
Defective control switch
Loose wire
Defective burner motor
RELIEF VALVE
Relief valve defective
LEAKS WATER
Landa PDHW Series Operator's Manual 8.919-980.0 - B
POSSIBLE CAUSE SOLUTION
Check and replace if necessary.
Check and replace if necessary.
Tighten all clamps. Check detergent lines for holes.
Replace restrictor. Check for proper orifice in
restrictor.
Clean or replace.
Disassemble and clean thoroughly
Dilute detergent to specifications.
Repair hole.
Add detergent, if needed.
Check water supply and possibility of air seepage.
Check and clean or replace if necessary.
Check and replace if necessary
(See serial plate for proper size).
Check and replace if necessary.
Check and replace if necessary.
Replace fuel pump.
Position correctly, tighten set screw.
Replace switch.
Check and replace or tighten wiring.
Replace motor.
Replace or repair.
Maintenance
21