User manual

AlfaSpid Rotator www.alfaradio.ca Page 13

lfa Radio Ltd. Trouble shooting tips

Before contacting

lfaRadio Ltd. Please make the following tests:.

NOTE: ON THE ELEVATION ROTATOR THERE ARE MECHANICAL

SWITCHES WHICH OPEN THE POWER WHEN THE END LIMIT IS

REACHED. A DIODE IS PLACED IN SERIES WITH THE MOTOR. TO TEST

FOR THIS, REVERSE THE POWER TO THE MOTOR.

The following are some trouble shooting tips, if for some reason your AlfaSpid

will not operate correctly.

It is important to confirm correct operation before installing on the tower.

This will rule out any damage that may have been caused by the shipping

company.

Check the Limits - PH and PL settings and rule out overlap.

Simple resistance tests can reveal incorrect or shorted wiring.

Pins 1 and 2 are the motor winding and will have a low resistance. Typical 2-3

ohms.

Pins 3 and 4 are the sense lines and typically will have either an open circuit or

have about 1200 ohms depending on the status of the reed switch in the rotator

and the length and gauge of used wire.

There should be no conductivity between 1 and 3 or 1 and 4, or between 2 and 3

or 2 and 4

All lines should have no conductivity to ground.