Flowline LC30 Thermo-Flo - Manual (Page 13)

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 condition, 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.