Hardi NAVIGATOR 3000, Руководство оператора, Страница: 102 / 122

7 - Fault finding
100
Liquid system
FAULT PROBABLE CAUSE CONTROL/REMEDY
No spray from boom when turned on. SmartValve/Pressure valve positions are wrong. Set correct valve positions for spraying.
‘ Suction/pressure filters are clogged. Clean suction and pressure filters.
No suction from tank. See if suction fitting in main tank sump is free of
sedimentation. Clean if needed.
Air leak on suction line Check if suction filter O-ring is sealing.
Check tightness of pump diaphragm and valve covers.
Lack of pressure. Incorrect assembly. Boost valve has a defect (located at the bottom of the
pressure filter). The valve seat is worn or missing.
Air in system (Centrifugal pump). Fill suction hose with water for initial priming.
Too much agitation. Close the agitation valve.
Pump valves clogged or worn. Check for obstructions and wear.
Defective pressure gauge. Check for dirt at inlet of gauge.
Pressure dropping. Filters are clogging. Clean all filters. Fill with cleaner water. If using
powders, make sure agitation is on.
Nozzles are worn. Check nozzle output. Replace nozzles if the deviation
in output exceeds 10%.
Sucking air towards end of tank load. Lower pump r.p.m.
Pressure increasing. Pressure filters beginning to clog. Clean all filters.
Make sure bottom valve on CycloneFilter is not left in
closed position (marked with 1 dot) after flushing
boom. Operating position (marked with 2 dots) keeps
CycloneFilter clean.
Formation of foam. Air is being sucked into system. Check tightness/gaskets/O-rings of all fittings on
suction side.
Excessive liquid agitation. Reduce pump speed (r.p.m.).
Check safety valve is tight (diaphragm systems only).
Ensure returns inside tank are present.
Use foam damping additive.
Operating unit not functioning or having a
malfunction. Blown fuse(s). Check mechanical function of microswitches. Use
cleaning/ lubricating agent if the switch does not
operate freely.
Check motor current, max. 450-500 mA. If over,
change motor.
Wrong polarity. Brown to positive (+). Blue to negative (-).
Valves not closing properly. Check valve seals for obstructions.
Check microswitch plate position. Loosen the screws
holding the plate 1/2 turn.
No power. Wrong polarity. Check that brown is positive (+), Blue
is negative (-).
Check print plate for dry solders or loose connections.
Check fuse holder is tight around fuse.