62
Troubleshooting
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First check the following points. If the following measures do not help remove problems, con-
tact your nearest distributor.
Ŷ3XPS
States
Possible causes
Solutions
The pump does not run
( the LED bar does not
light, or the screen is
blank.).
Power voltage is too low.
• Observe the allowable voltage range of
90-264VAC.
The pump is not powered.
• Check the pump is switched on.
• Correct wiring.
• Replace a breaking wire to new one.
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pumped up.
Air lock in the pump
• Expel air. See page 39.
Entrained air from a suction line con-
nection
• Fix the connection/reroute the suction line
as necessary.
A missing O ring from a valve set.
• Fit the O ring to the valve set.
Debris is stuck in the pump head
valves.
• Disassemble, inspect and clean the
valves. Replace as necessary.
A ball valve is stuck on a valve seat.
• Disassemble, inspect and clean the
valves. Replace as necessary.
A vale seat has been pressed in the
valve guide.
• Do not push the valve seat into the valve
guide. See page 67.
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Air trapped in the pump head.
• Expel air. See page 39.
Overfeeding occurs.
• Mount a back pressure valve to keep the
discharge line pressure constant.
Debris is stuck in the pump head
valves.
• Disassemble, inspect and clean the
valves. Replace as necessary.
The diaphragm unit is broken.
• Replace the diaphragm set. See page 67.
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point.
• Maintain the pressure constant by opti-
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point.
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The nut is loose.
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• Retighten the pump head. See page 38.
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• Fit O ring to the valve set. See page 67.
The diaphragm unit is broken.
A leak from the drain port (vent hole)
• Replace the diaphragm set. See page 69.
