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Try opening clusters until the controller is unable to hold the vacuum level, close again
quickly to test whether the original Air Regulator(s) will pull in, if they do, adjust the
regulator in “Test” to a higher level.
When the pump has reached maximum speed (pre programmed to 55Hz) with a number
of clusters open, verify the kilowatt draw shown on the display against the name plate
data. Parameter #202 can be moved up or down to set the kilowatts at approximately 15%
higher than the nameplate data. This will give the plant a greater vacuum reserve.
Warning; long periods with the pump at maximum speed will cause overloading and a
higher power usage. A balance between extra vacuum reserve and power saving should
be according to the farmers wishes.
Turn the “Auto/Off/Test” switch to off. Allow the pump to stop. Turn the switch to
“Test”, the controller will start and run at 50Hz constant and the air regulators will come
in. This is a “Manual” operation mode which can be used by machine fitters to establish
vacuum reserve in the conventional mode. Remember that the “Auto” mode will give an
additional approximately 15% reserve depending on parameter #205 setting and
pump/motor/plant size, in Setup 1. Setup 2 will come in automatically after 60 seconds
and reduce loading to the rated motor load until overload situation has been rectified. It
will then revert back to Setup 1.
