IWAKI EWN -B16 TC, Инструкция по эксплуатации

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Troubleshooting
Troubleshooting
First check the following points. If the following measures do not help remove
problems, contact us or your nearest distributor.
States Possible causes Solutions
The pump
does not
run. (LED
does not
light. Blank
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.
Liquid can
not be
pumped up. Air lock in the pump • Expel air. See page 38.
Stroke length is too short. • Run the pump at 100% stroke
length and adjust it to proper
length.
Air ingress through 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.
The flow
rate fluctu-
ates. Air stays in the pump head. • Expel air. See page 38.
Overfeeding occurs. • Mount a check valve. See page
28.
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
piping or by relocating the point.