Landa PDHW5-35624E, Руководство по обслуживанию, Страница: 13 / 44

13
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 restricter. 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 Service Manual 8.920-098.0 - AU