LOV
™
Technical Reference
10
Troubleshooting the AIF System (AIF)
Problem Probable Cause Fix
Actuator doesn’t
function.
Actuator unplugged.
AIF board failure.
Actuator is bad.
1.
2.
3.
Ensure actuator leads are plugged into AIF
board (J1 for FV, J3 for DV).
Check the power on the connector of the
problem actuator while manually opening
or closing the actuator. Pins 1 (black) and 4
(white) should produce +24VDC when the
actuator is opening; -24VDC should be read
from Pins 2 (red) and 4 (white) when the
actuator is closing. If either voltage is missing,
the AIF board is likely bad. Test the actuator
by plugging into another connector to open
or close. If the actuator operates, replace the
board.
If proper voltages are seen at the connector
and the actuator doesn’t operate, replace the
actuator.
1.
2.
3.
Wrong vat opens. Actuator is plugged into wrong
connector.
Locator pin is in wrong position.
1.
2.
Ensure the actuator is plugged into the
correct connection (J1 for FV return, J3 for
DV return; J6 for FV drain, J7 for DV drain).
Ensure the locator pin is in the proper position
in plug J2. See charts on pages 38-43 of this
manual for proper pin position.
1.
2.
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