Landa SEHW6-3500, Руководство оператора, Страница: 13 / 38

LANDA SEHW • 8.913-932.0 • Rev. 02/12a
13
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
RELIEF VALVE
OUT LEAKS OR
SPRAYS WATER
Spray nozzle plugged Remove nozzle and clean out obstruction.
Mis-adjusted or defective relief valve Adjust or replace as needed.
Scale or dirt plugging inside of coils See "Preventative Maintenance
Cleaning of Coil".
DETERGENT
NOT DRAWING
Air leak Tighten all clamps. Check detergent lines
for holes.
Detergent metering valve packing not
tight or packing worn Tighten nut. Replace valve or packing.
Filter screen on detergent suction
hose plugged Clean or replace.
Dried up detergent plugging
metering valve or injector Clean and flush.
Restricter in float tank missing Install restricter.
High viscosity of detergent Dilute detergent to specifications.
MACHINE WILL
NOT DRAW UP
DETERGENT
Clamps holding detergent lines are
loose Tighten clamps.
Hole in detergent line(s) Repair hole.
Strainer basket plugged Remove and clean.
BURNER MOTOR
WILL NOT RUN Overload protector tripped Push reset button.
Fuel pump seized Replace fuel pump.
Burner fan loose of misaligned Position correctly, tighten set screw.
Defective control switch Replace switch.
Loose wire Check and replace or tighten wiring.
Defective burner motor Replace motor.
EXCESSIVE
VIBRATION IN
DELIVERY LINE Irregular function of
check valves, metering valves Check and replace if necessary.
TEMPERATURE
RELIEF VALVE
LEAKS WATER
(PUMP PROTECTOR)
Spray gun in OFF position with
machine operating for an extended
period of time Open spray gun to cool circulating water.
Relief valve defective Replace valve.
Particle between valve and seat Remove internal parts and clean.
BURNER STAYS ON
WHEN SPRAY GUN
IS IN OFF POSITION
Fuel pump pressure too high Lower fuel pressure to specifications.
Flow switch malfunction Test for continuity and replace as needed.
Fuel solenoid defective Replace fuel solenoid.
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
Pump sucking air Check water supply and possibility of air
seepage.
Valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
Nozzle incorrectly sized See serial plate for minimum nozzle size.
Worn piston packing Check and replace if necessary