Troubleshooting; Testing Relays - FlowLine Switch-Pro LC4 Series Manual

Appendix

TROUBLESHOOTING:

PROBLEM
Relay switches only from input A
(ignores input B)
Level reaches alarm ON, but relay
is OFF.
Pump or Valve is supposed to
stop, but it does not.
Controller is powered, but nothing
happens.

TESTING RELAYS:

Normally Open (NO) Wiring:
| 18
SOLUTION
Latch is turned OFF. Flip the latch switch to turn ON.
First, check to make sure the input LED is ON. If not, check wiring to
sensor. Second, check status of Relay LED. If incorrect, flip the Invert
switch to change the relay state.
First, check to make sure the input LEDs are both in the sate state
(both ON or both OFF). If not, check wiring to sensor each sensor.
Second, check status of Relay LED. If incorrect, flip the Invert switch to
change the relay state.
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.
The relay contacts are true dry
contacts with no voltage sourced
within the relay contacts. To test,
connect a Multimeter set to read
Ohms.
Normally Open Wiring

With Invert Off, circuit will be
Open.

With Invert ON, circuit will
read a small resistance.
Normally Closed Wiring

With Invert Off, circuit will be
read a small resistance.

With Invert ON, circuit will be
open.
Normally Closed (NC) Wiring:
MN301520 Rev A1
Step Eight