User Manual

RevA LC900008 13of14
APPENDIX StepNine
ControllerLogic:Pleaseusethefollowingguidetounderstandtheoperationofthecontrollers.
1. PowerLED:MakesuretheGreenpowerLEDisONwhenpowerissuppliedtothecontroller.
2. InputLED:ForNCswitchwiring,theinputLEDonthecontrollerwill beAmberwhentheswitchreadsno‐
flowandOFFwhentheswitchreadsflow.
3. InvertOperation:WhentheinputLEDturnOffandOn,therelayLEDwillalsoswitch.WithinvertOff,the
relayLEDwillbeOnwhentheinputLEDisOnandOffwhentheinputLEDisOff.
WithinvertOn,therelay
LEDwillbeOffwhentheinputLEDisOnandOnwhentheinputLEDisOff
.
4. RelayOperation:TherelaymaybewiredeitherNOorNC.ThenormalstateoftherelayiswhenitsLEDis
Off.WiththeLEDOn,therelayisintheenergizedmodeandallterminalconnectionsarereversed.
Troubleshooting:
PROBLEM SOLUTION
Controllerispowered,butnothing
happens.
FirstcheckthePowerLEDtomakesureitisGreen.Ifnot,check
the wiring, power and make sure the terminal is seated
correctlyoverthe6‐pins.
A Flow or No‐Flow condition is
metbuttherelaydidnotswitch.
Check the relay by switching the invert switch.Confirm that
relayclickonandoffaswellastherelayLED.
The Flow or No‐Flow is not
switchingatthecorrectflowrate.
The flow switch may need to be adjusted.Review the Flow 
SwitchCalibrationsectiononthepreviouspageforinstructions
on setting the actual flow switch.Note: access to the flow
switch adjustment is difficult and requires the removal of the
PCBassembly.Usecautionwhenperformingthisstep.
Trying to start the flow but the
controller keeps turning the flow
off.
Torestartaflowconditi on,thesensorneedstosenseanactual
flow condition before changing the relay in the controller.A
flow switch over‐ride may need to be added across the relay
contacts that allows for a true flow to occur before switching
back to the controller.The use of a moment switch is
recommendedfortheover‐rideswitch.
RelayLEDdoesnotmatchmyflow
condition.
TherelayLEDcanbeswitchedbyeitherthereversingthewiring
of the sensor to the controller or by flipping the invert switch.
This means that the relay LED can either be set to turn on
during a flow condition or to turn off during a no‐flow
condition.This is all dependent on the wiring and the invert
position.
Relay LED does not match the
sensor’sLEDindicator.
Thesensor’sLEDwillalwaysbeONduringaNo‐Flowstateand
OFF during a Flow state, regardless of the  switches wiring.As
per above the input  LED can be inverted to any condition.In
some applications, they will match and in others they will be
opposite.This is all dependent on the application
parameter/setup.


