Landa HOT 2-1100, Service Manual

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HOT SERVICE MANUAL • 8.917-210.0 • Rev. 09/17A
3
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
FLUCTUATING
PRESSURE
Valves worn Check and replace if necessary.
Blockage in valve Check and replace if necessary.
Pump sucking air Check water supply and air
see page at joints in suction line.
Worn piston packing Check and replace if necessary.
PUMP
NOISY
Air in suction line Check water supply and
connections on suction line.
Broken or weak inlet
or discharge valve springs Check and clean
if necessary.
Excessive matter in valves Check and clean if necessary.
Worn bearings Check and clean if necessary.
PRESENCES OF
WATER IN OIL
Oil seal worn Check and replace if necessary.
High humidity in air Check and change oil twice as often.
WATER DRIPPING
FROM UNDER PUMP
Piston packing worn Check and replace if necessary.
O-Ring plunger retainer worn Check and replace if necessary.
Pump
protector Reduce inlet water pressure.
Do not close trigger on spray
gun for longer than 1-2 minutes.
OIL DRIPPINGS
Oil seal worn Check and replace if necessary.
MACHINE
SMOKES
Improper fuel or water in fuel Drain tank and replace contaminated fuel.
Improper air adjustment Readjust air bands on burner assembly.
Low fuel pressure < 140 PSI Adjust fuel pump pressure to specifications.
Weak fuel pump Check fuel pump pressure.
Replace pump if needed.
Fuel filter partially cogged Replace as needed.
Soot build up on coils Clean coils with soot remover.
Lime build
up in coils Clean inside of coils
using Landa's coil cleaner.
Improper burner nozzle See combustion assembly breakdown.
Electrode is misaligned Realign electrodres to specs.
Fuel pressure is to high for clean
burn (Fuel PSI above 140 but less
than 200) Reduce fuel PSI / increase air and band
set for cleaner burn without max water heat
loss.
WATER
TEMPERATURE
TOO HOT
Incoming water to
machine warm or hot Lower incoming
water temperature.
Fuel pump pressure too high Lower fuel pressure.
Fuel pump defective Replace fuel pump.
Detergent line
sucking air Tighten all clamps. Check
detergent line for holes.
Defective high limit switch Replace.
Incorrect fuel nozzle size See exploded view parts list for proper size.
Insufficient water supplied Check G.P.M. to machine.
Restricted water flow Check nozzle for obstruction, proper size.
A) SMOKES
WHILE UNIT
IS RUNNING
B) SMOKES AT
COLD-START
WHEN BURNER
IS OF
AB
AB
AB
AB
AB
AB
AB
AB
AB
B