Hotsy HSS • #8.914-412.0 • Rev. 10/11
19
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
MACHINE SMOKES
Low engine RPM
Increase RPM.
LOW WATER
TEMPERATURE
Improper fuel or water in fuel
Replace with clean and proper fuel.
Low fuel pressure
Increase fuel pressure.
Weak fuel pump
Check fuel pump pressure.
Replace pump if needed.
Fuel filter partially clogged
Replace as needed.
Soot build-up on coils not
allowing heat transfer
Clean coils.
Improper burner nozzle
See burner specifications.
WATER
TEMPERATURE
TOO HOT
Incoming water to machine
warm or hot
Lower incoming water temperature.
Fuel pump pressure too high
See specifications for proper fuel pressure.
Fuel pump defective
Replace fuel pump.
Detergent line sucking air
Tighten all clamps.
Check detergent lines for holes.
Defective temperature switch
Replace.
Incorrect fuel nozzle size
See burner specifications.
Insufficient water supplied
Check water G.P.M. to machine.
Restrict water flow
Check nozzle for obstruction, proper size.
PUMP NOISY
Air in suction line
Check water supply and
connections on suction line.
Broken or weak inlet or discharge
valve springs
Check and replace if necessary.
Excessive matter in valves
Check and clean if necessary.
Worn bearings
Check and replace if necessary.
PRESENCE 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.
Cracked piston
Check and replace if necessary.
Pump protector
Lower water supply pressure. Do not run with
spray gun closed longer than 2 minutes.
