SMC Networks EX245-FPS1 Operation Manual page 88

No. Problem
1 US1 indicator is OFF.
2 US1 indicator is flashing.
3 US2 indicator is OFF.
4 US2 indicator is flashing.
A solenoid valve is not
5
operating.
Table 16-3 Troubleshooting for Overall system
Possible cause
Incorrect wiring.
US1 is not present or below the
dropout level (< approx. 17 VDC).
US1 is below the permissible level
but above the dropout level (17 to
21.6 VDC).
Incorrect wiring.
US2 is not present or below the
dropout level (< approx. 17 VDC).
US2 is below the permissible level
but above the dropout level (17 to
22.8 VDC).
Incorrect connection.
Solenoid valve is faulty.
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Remedy
●Check the cable.
●Check the wiring and pin numbers.
Check the supply for the logic/sensors.
Check the supply for the logic/sensors.
●Check the cable.
●Check the wiring and pin numbers.
Check the supply for the valves/loads.
Check the supply for the valves/loads.
Check the connection with the SI
Unit.
Check the solenoid valve.
No.EX##-OMY0004