Prochem Legend SE AD - Manual (Page 45)

TROUBLESHOOTING
LEGEND SE 980059 07/23/02
4-13
PROBLEM CAUSE SOLUTION
Water supply is turned off or the float
valve is stuck or improperly adjusted.
NOTE: This may also cause the water
pressure switch to shut the unit down. Turn the water supply on or up. Check
for kinks in the water supply hose.
Examine the float valve and adjust or
replace.
Water pump inlet supply line is plugged
or drawing air. NOTE: This may also
cause the water pressure to shut the
unit down.
Examine the water inlet filter inside the
water box. Remove accumulated debris
and replace if required. Check for
suction leaks and loose clamps or
fittings. Tighten any loose fittings or
clamps. Replace any ruptured hose(s).
Improper engine speed
Using a tachometer, check the engine
speed. Full throttle engine speed is 2600
RPM. Re-adjust in accordance with the
Kohler Engine Operation and Serive
Manual.
Pressure regulator o-rings are dry.
Lubricate o-rings, using o-ring lubricant
Part #05-008035.
Pressure regulator has worn o-rings Check o-rings. If necessary, replace.
Pressure regulator is dirty, stuck open,
or improperly adjusted.
Clean or repair regulator. Adjust to
working pressure. Lubricate o-rings,
using o-ring lubricant Part #05-008035.
Low pump volume. (Measure the
amount of water being returned to the
water box from the pressure regulator.
It should fill a gallon container about
every 17 seconds).
Examine the check valves, plunger cups,
and cylinder head on the water pump.
Repair, whenever required (refer to the
water pump service manual).
Defective water pressure gauge. Replace gauge
Orifice (spray nozzle) in the cleaning
tool is worn, defective, or wrong size.
Replace Nozzle or change nozzle size.
Bypass minifold orifice not installed or
installed improperly (threads damaged
in manifold). Check bypass manifold and orifice for
proper installation and repair, if
necessary.
Debris clogging water lines or water
inlet disconnect.
Clean or replace as needed.
Loss of water pump pressure.
With the cleaning tool open,
the water pressure gauge
reads below the normal
operating pressure. NOTE:
If the water pump pressure
drops below 50 PSI or
exceeds 1200 PSI, the unit
will automatically shut down.
Belt loose or broken Re-tension or replace as needed.
Plugged orifice and/or screen in the
cleaning tool.
Unplug or replace orifice and/or screen
Internal block between the pressure
regulator manifold and the outlet Y-
strainer, or the Y-strainer screen is
clogged
Inspect all lines, remove accumulated
debris which in blocking proper flow.
Replace any defective hoses. Remove,
inspect, and clean the Y-strainer screen.
De-scale unit and install a water softner,
if necessary.
Outlet check valve is plugged
Examine the check valve, remove any
debris
Defective quick-connect on one or more
of the high pressure hoses. Replace defective quick-connects(s) on
high pressure hoses(s).
Cleaning tool valve is malfunctioning. Repair or replace valve.
Hose inner lining is constricted. Remove restriction or replace hose.
Loss of solution volume at
cleaning tool orifice.
Water gauge reads normal.
Engine exhaust heat exchanger is
scaled on inside of coil.
De-scale coil, and install the water
softner, if necessary, to protect the
equipment. If water contains 3-1/2 grains
or more of water hardness, a water
softener is needed.