Landa HOT2-1100 Service Manual page 3

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