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23
PUMPING SYSTEM
Problem Probable Cause Remedy
Downstream injector will
not siphon chemical
Adjustable knob on injector
is closed (Where applicable)
Open by turning counter
clockwise
Unit not in low pressure
mode
Open dual wand or install
low pressure (BLACK) nozzle
Detergent hose cut or kinked Inspect hose, replace as
required
Chemical Strainer plugged or
not submerged
Check screen on strainer
pickup tube
Internal injector parts
corroded or stuck
Disassemble, clean or
replace
Outlet water temperature
too high
Use with cold water (150º
Maximum)
Pressure relief reliving
water
Unloader failure / coil
overheating / Excessive
pressure
Turn machine off wait a
few minutes and restart. If
problem continues take to an
authorized repair center for
complete system check
HEATING BURNER SYSTEM – DIESEL FIRED
Problem Probable Cause Remedy
Burner will not fire
WARNING: High voltage
on igniter can cause
electrical shock. Disconnect
power beforeservicing.
Burner switch not on Turn switch on; Thermostat
on if equipped
Diesel fuel level low Fill burner tank with #2 diesel
or other approved fuel
Trigger on spray gun not
pulled
Squeeze trigger to fire burner
Fuel filter plugged Clean and / or tighten fuel
filter (Check fuel pressure)
Spray nozzle plugged Clean spray nozzle
Overload on burner motor
tripped
Reset overload, locate and
correct source of overload
Nozzle not in wand Install nozzle in wand
Low water pump pressure See pumping systems
trouble shooting
Fuel pump or nozzle stopped Check fuel pressure, filter,
fuel lines. Replace fuel pump
and/or nozzle
Vacuum, Flow, Pressure or
Temperature switch faulty
Check electrical continuity
with pump spraying and
burner on
Fuel solenoid valve faulty Replace fuel valve if it does
not open when power is
applied
Low generator voltage
output
Adjust generator RPM for
proper voltage under full load
conditions
Burner relay faulty (12-V
Burner only)
Replace burner relay
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