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MELTER OPERATION MA-5052-ENG MACRO SERIES MELTER MANUAL
3. Using the up/down arrows, select the rotation speed and/or wait for
pumping permission to be enabled (red LED is turned off).
At this moment, the pump will start to rotate at the speed indicated on the display.
4. Adjust the rotation speed to the value required for the application. The
selected value is set pressing the right arrow key after blinking three times.
The pump will stop whenever:
• The control card is disabled with its ON/OFF button.
• The pumping ON-OFF button is pressed (red LED is illuminated).
• When a variator error signal is activated (E5).
• When the MAXIMUM RPM ALARM TIME appears.
• When the MINIMUM RPM ALARM TIME appears.
The maximum full scale for admissible revolutions is 100 (we recommend
working at speeds of not less than 10 rpm and not greater than 80 rpm).
This full scale can be adjusted by reducing this value in percentage terms. To
make adjustments consult the ‘User configuration menu’, ‘1. MAXIMUM RPM’.
Mode of operation with internal pumping control and external speed control
In this operating mode, pumping is controlled from the equipment and speed
is controlled by a 0-10 V external signal from the main machine.
Follow the steps below to use this operating mode:
1. Press the ON/OFF button to light up the control card.
2. Select ‘ok’ in the position ‘int’ and ‘ref’ in the position ‘ext’.The ‘ref ext’
LED will illuminate when voltage is received.
To activate the start-up status, all of the following conditions must be met:
• That the signal from the main machine reaches input E2 and its value
is not 0.
• That the input for pumping permission (E4) at central control is activated, as
pumping is not possible unless the equipment temperature is OK.
• That pumping is enabled with the pumping ON-OFF button (red LED is
turned off).
• That the failure input is not activated (E5), in which case starting the
pump would be impossible. In case of the pump be operating and this
input is activated, pumping will cease immediately.
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