Landa PDHW5-35624E, Operator'S Manual

Page: 21 / 24

21
Maintenance
PROBLEM POSSIBLE CAUSE SOLUTION
OIL DRIPPING Oil seal worn Check and replace if necessary.
EXCESSIVE
VIBRATION IN
DELIVERY LINE
Irregular functioning of the valves Check and replace if necessary.
DETERGENT
NOT DRAWING Air leak Tighten all clamps. Check detergent lines for holes.
Restrictor in float tank is missing
Replace restrictor. Check for proper orifice in
restrictor.
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.
Hole in detergent line(s) Repair hole.
Low detergent level Add detergent, if needed.
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.
Nozzle incorrectly sized
Check and replace if necessary
(See serial plate for proper size).
Unloader valve seat faulty Check and replace if necessary.
Worn piston packing Check and replace if necessary.
BURNER MOTOR
WILL NOT RUN Fuel pump seized Replace fuel pump.
Burner fan loose or misaligned Position correctly, tighten set screw.
Defective control switch Replace switch.
Loose wire Check and replace or tighten wiring.
Defective burner motor Replace motor.
RELIEF VALVE
LEAKS WATER
Relief valve defective Replace or repair.
Landa PDHW Series Operator’s Manual 8.919-980.0 - B