20
Operational functions
Protective functions
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The interlock function works in the same way as the STOP function. Use this function for an emergency stop.
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The pump stops right after a built-in sensor detects a leak in the compartment at the back of the diaphragm. In
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phragm replacement. To release this error condition, push the start/stop key.
NOTE
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is the only valid indicator. In either case, replace the diaphragm immediately when a leak is found.
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densed water can build up in the compartment at the back of the diaphragm and the built-in leak sensor
there can stop the pump even when no leak has occured. Reduce the temperature difference between the
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charge pressure than the maximum level or when the hole IC which monitors the motor rotation has failed. If the
pump is suspended (by the over-current protection) in either condition, the pump resumes operation 30 seconds
later. If the suspended operation has recurred 5 times consecutively, the pump will not resume operation any
more and will keep still. These error conditions can be released when the start/stop key is pushed once.
NOTE
The discharge pressure can rise 1.2-1.5 times higher than the maximum allowable level of the pump depend-
ing on operating conditions and piping layouts. If the pressure rises too sharp (with the closed discharge), it
may not be even detected or curbed by the over-current protection. Set up a relief valve to protect the related
devices on the discharge line from the possible pressure rise if necessary.
OFF
ON
1
2
3
4
5times
30sec
30sec
30sec
30sec
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Run
Stop
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A leak is detected.
OFF
ON
