22
Troubleshooting
Noisy operation, vibrations, unsteady pressure.
Air in system **
Intake clogged
Prefilter dirty
Feed pump defective
Valve defective or soiled ***
Pressure regulation valve dirty
Bleed system **
Clean intake
Cean or replace filter
Replace feed pump
Open valve caps and check valves, replace valves ***
Clean valve
Production falls
Less voltage
Membrane defect or dirty
Check voltage direct at motor connections
Clean or replace membrane
Motor does not turn or make grinding noises
No voltage, relay defective
Fuse defective
Motor magnets detached due to overheating.
Carbon brushes consumed about 3000 hours
Check voltage at motor connection , replace relay.
Replace fuse.
Re-attach magnets with epoxy glue.
Replace brushes.
Oil eakage between pump head and crankcase
Crankcase gasket rings defective
Replace gasket rings
Water leakage between pump head and crankcase
Plunger(s) defective / o-rings plunger defective
HP / LP seals defective
Replace plunger(s)/ replace o-rings.
Replace seals.
Water in pump case
High humidity (mostly), wrong oil.
Reduce oil change interval, use right oil.
** To bleed air from the system a fresh water flush via the on-board pressurized water system is often
optimal for removing existing air from the system.
Note:
Grease the thread of the valve screws with metal-free anti seize paste for
stainless to prevent seizure.
*** None or large fluctuations in pressure,
simultaneously loud noise and a strongly vibrating high
pressure hose are indications of usually a disturbed
inlet with air in the system, also a defective or only dirty
valve of the high-pressure pump is possible. The fault
is in one of the 6 valves in the pump head.
Which of the 6 valves is causing a problem is not
visible from the outside.
To repair the error, the 6 hexagonal 22 mm or 19 mm
screws must be unscrewed with a wrench to take out
the valves.
Since the smallest, barely visible piece of dirt can lead
to this problem, it is often the case that no visible dirt
can be seen. Often, dismantling and reassembling the
valve is enough to resolve the failure. Occasionally, the
valve must be replaced even though no fault can be
seen.
This error may also occur after prolonged downtime.
Before the valves are removed, it sometimes helps to
operate the system at lower pressure for several
minutes to remove the dirt.
Note: Possibly, the pressure control valve can also
be dirty.
Valve screw
O-ring
Valve body
Valve spring
Valve plate
Valve seat
O-Ring
serial number
