31
Advantage Disadvantage
Direction of
Water Used
(Upward)
1. Keep the actual pressure always higher
than command pressure in the operating
process, especially for strict and precise
applications.
1. If the lift is too high which cause the
operating frequency higher than usual
even if little water usage or not using
water. The efficiency of upward water
usage detection won’t be as good as
we expect.
2. When multi pump operate in parallel,
the slave is hard to get into sleep.
Direction of
Water Used
(Downward)
1. Get into sleep more efficient in only small
amount water usage or not using water
situation.
2. When multi pumps operate in parallel, the
drives have more efficient to control the
operating drive quantity and output
frequency in downward water usage
detection.
3. The operating order is master, slave1,
slave 2, slave 3, and the sleeping order is
slave 3, slave 2 ,slave 3, the master and
slave will exchange after Auto Shift Time ,it
also helps the product life.
1. It could cause pressure shock wave if
we didn’t adjust (16-8) Pressure range
of water usage detection and (16-B)
Deceleration time of water usage
detection appropriately.
(12):16-9 HiP/LoP/1BrE Protection Auto Restart Time 0 – 200 min
16-9 = 0(min): Disable auto restart function.
When Hi-p or Lo-p protection happens, the pump will stop. It will auto restart after 16-9
auto restart time.
When 1BrE is occurred during dual pump operation and the message will disappear
after 16-9 auto restart time. When 1BrE is reset, it is never occurred again, until
Master and Slave unit change states. (Reference dual pump parameter)
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