Troubleshooting - FlowLine Switch-Pro LC10 Series Manual

Appendix

TROUBLESHOOTING

PROBLEM
Relay switches only from input 1A
(ignores input 1B)
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:
Relay De-energized:
MN301510 Rev A1
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 block(s) is(are) seated
correctly over the 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.
Relay De-energized

Small amount of resistance
across Common (C) and
Normally Closed (NC).

O.L. across Common (C) and
Normally Open (NO)
Relay Energized

O.L. across Common (C) and
Normally Closed (NC).

Small amount of resistance
across Common (C) and
Normally Open (NO).
Step Eight
Relay Energized:
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