66 Troubleshooting
Liquid leaks. Loose
fi
t of the
fi
tting or the air vent
body.
• Retighten them.
Loose
fi
t of the pump head.
• Retighten the pump head. See
page 32.
O rings or valve gaskets are not
installed.
• Install O rings and valve gaskets.
Diaphragm is broken.
• Replace the diaphragm.
Excessive discharge pressure.
• Check that a discharge line is not
closed.
• Check if tubing is not clogged.
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