Specifications

Printed in the U.S.A.

AE8-1368 R2

Module Low Voltage Trip

Sensor Module input voltage

must be greater than 16.5 volts

Check the Sensor Module supply voltage

at the leads connected to the terminal

labeld “24 VAC IN” in the terminal box.

Is the voltage below 16.5 volts?

Normal Operation. Check the supply voltage at the

transformer. Correct the low voltage condition.

Voltage must be above 16.5 V for module to reset.

Verify proper transformer VA rating and wiring size

(See Appendix C). Replace the transform if

necessary.

Yes

6.8

Reonnect the sensor module power

leads. Check the voltage on pins 4 and

15 of the 18-pin AMP connector to the

control module. Is the voltage below 16.5

Check the white plug connector at the sensor

module and be sure that it is completely

engaged. If movement of the connector

causes intermittent power, resize the

receptacle pins or replace the harness

Check the continuity of the wires in the

cable harness from pins 4 and 15 of

the 18-pin AMP connector. Do the

readings indicate a poor connection or

a broken wire? (See Appendix B)

Yes

Note: The 24VAC supply voltage to the control module

is also used to provide power to the unloader coil(s) if

present. In the event of intermittent low voltage trips it

may be helpful to check the transformer output voltage

while overriding the unloader coil ON with the rack

controller. This can be done by forcing the unloader

stage “OFF”.

If powering the unloader coil(s) causes the supply power to

the module to drop below 16.5 v, check to be certain that

the transformer meets the proper VA requirements. Refer

to Appendix C of this manual for information concerning

proper transformer selection.

White Power Connector At

Sensor Module