SMC Networks EX260 Series Operation Manual page 23

Fault No.7
Fault Probable cause
Group of
valves not Too many valves
working
Fault No.8
Fault Probable cause
Poor connection
between SI unit and
valve manifold
All valves and
valve LEDs
Mismatch polarity
are not
between solenoid
operating
valve and SI unit
output
Defective solenoid
valve
Fault No.9
Fault Probable cause
Valves do not Mismatch polarity
work but valve between solenoid
LEDs are valve and SI unit
operating output
Recommended error handling
Check if solenoid count does not exceed the
allowable number.
This depends on the SI unit model and valve
series.
Allowable solenoid number by valve series:
SY/SV/S0700 series: 32 points
VQC series: 24 points
Recommended error handling
Check if there are any loose screws making
the connection between the SI unit and the
valve manifold.
Check if the solenoid valve common
specification matches the output polarity of
the SI unit.
Follow the troubleshooting for the solenoid
valve.
Recommended error handling
Check if the solenoid valve common
specification matches the output polarity of
the SI unit.
-22-
Recommended action
Keep the number of mounted
solenoid valves within
specification.
Recommended action
Tighten the screws with the
specified tightening torque
(i.e. 0.6 Nm) and make sure
there is no gap between the SI
unit and the valve manifold.
Match polarity between
solenoid valve and SI unit
output.
Same as left.
Recommended action
Match polarity between
solenoid valve and SI unit
output.
No.EX※※-OMP0005-E