42
Troubleshooting
Troubleshooting
First check the following points. If the following measures do not help removing
problems, contact us or your nearest distributor.
States
Possible causes
Solutions
The pump
does not run
( blank
LED
or screen).
Power voltage is too low.
•
Observe the allowable voltage
range of 90-264VAC
The pump is not powered.
•
Check the switch if it is installed.
•
Correct wiring.
•
Replace a breaking wire to new
one.
A PCB has failed.
•
Replace the pump.
Liquid can
not be
pumped up.
Air lock in the pump
•
Expel air. See page 29.
Air ingress through a suction line.
•
Correct tubing.
A valve set is installed upside
down.
•
Reinstall the valve set.
Valve gaskets are not installed.
•
Install valve gaskets.
Foreign matters are stuck in the
pump head valves.
•
Dismantle, inspect and clean the
valves. Replace as necessary.
A ball valve is stuck on a valve
seat.
•
Dismantle, inspect and clean the
valve. Replace as necessary.
A flow rate
fluctuates.
Air stays in the pump head.
•
Expel air. See page 29.
Overfeeding occurs.
•
Mount a check valve. See page
22.
Foreign matters are stuck in the
pump head valves.
•
Dismantle, inspect and clean the
valves. Replace as necessary.
Diaphragm is broken.
•
Replace diaphragm.
Pressure fluctuates at an injection
point.
•
Maintain a pressure constant at
an injection point by optimizing
tubing or by relocating the point.
Liquid leaks. The fitting or the air vent body is
mounted loose.
•
Retighten as necessary.
The pump head is mounted loose.
•
Retighten as necessary. See page
28.
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.
