SMC Networks EX510-GPR1 Series Operation Manual page 59

Trouble No.2
Trouble Possible cause
Incorrect branch
cable connection
COM LED of
unit goes off
Branch cable failure
Trouble No.3
Trouble Possible cause
Incorrect connection
between unit and
solenoid valve
Incorrect wiring
between unit and
solenoid valve
System setting error
Solenoid
valve falls in
Incorrect solenoid
failure
valve power supply
voltage
Solenoid valve failure
Unit failure
Trouble No.4
Trouble Possible cause
RUN LED
goes off or
BF LED lights Incorrect address
up setting
(DIA LED
flashes)
Trouble No.5
Trouble Possible cause
Incorrect input and
GW unit controlling
RUN LED or
part power supply
BF LED goes
connection
off
(DIA LED
Input and GW unit
goes off)
controlling part power
supply failure
Investigation method of cause
Confirm there is no breakage, incorrect
connection and looseness at connecting
part of the branch cable.
Confirm there is no equipment and high
voltage line which might generate a
noise around the branch cable.
Check the length of the branch cable
and use of dedicated cable.
Investigation method of cause
Confirm there is no looseness of the
connector between unit and solenoid
valve.
Confirm there is no breakage and failure
of wiring between unit and solenoid
valve.
Confirm the GW unit is set correctly.
Confirm the power supply voltage from
the unit is within power supply voltage
specified for the sensor. Also, confirm
the length of a branch cable and current
for the unit are within their
specifications.
Replace with new one and check the
operation again.
Replace with a new one and check the
operation again.
Investigation method of cause
Confirm the address isn't set to 126 or
127.
Investigation method of cause
Confirm there is no incorrect connection
between input and GW unit controlling
part power supply and GW unit power
supply connector.
Confirm the condition of input and GW
unit controlling part power supply.
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Solution
Fix connection of the branch
cable.
Take a proper measure such as
by separating the branch cable
from the noise source.
Fix connection.
Solution
Fix the connection between unit
and solenoid valve.
Fix the wiring between unit and
solenoid valve.
Fix the setting.
Operate within the
specifications.
Read the troubleshooting of
solenoid valve.
Replace unit.
Solution
Set the address between 0 and
125.
Solution
Fix the connection.
Supply 24 VDC ±10% for input
and GW controlling part power
supply of the GW unit.
No.EX##-OMI0032-C