Troubleshooting - SMC Networks VNC Series Operation Manual

Troubleshooting

Seek the same trouble from the following table, and take the appropriate countermeasure.
Trouble Item to check
Is the voltage the rated
voltage?
Is the wiring correct?
Is the switching signal
normal?
Operation
Is the pressure within the
failure
specified range?
Is manual operation
available?
Is there drainage
accumulation?
Is the piping correct?
Is sealing agent applied to
Air leak
the pipe joint?
Is the tightening torque
correct?
Is the pressure within the
specified range?
Is the voltage the rated
voltage?
Is the actuator's capacity
Response
appropriate?
delay
Is the setting of the speed
controller correct?
Is there drainage
accumulation？
Is the voltage the rated
voltage?
Coil burn
Is there liquid on the pilot
valve?
Beat and Is the voltage the rated
noise voltage?
If any applicable defect is found after checking the above items, the valve has some trouble. In that case,
stop using the valve immediately.
If any of the following practices are applicable, the valve may have some trouble inside. In that case, stop
using the valve immediately.
(1) Voltage other than the rated voltage was applied.
(2) Lubricant other than the specified lubricant was supplied.
(3) Lubrication was stopped intermediately, or lubrication was stopped temporarily.
(4) The valve was directly exposed to liquid such as water.
(5) Intense vibration was applied.
(6) Foreign matter such as drainage and dust entered.
(7) Any other practices which are covered by the precautions stated in this operation manual occured.
*If the valve seems to fail, return it to SMC as it is.
Countermeasure
Use the rated voltage.
Wire correctly.
Apply the specified voltage to the valve correctly.
Move the pressure within the specified pressure range.
Replace the valve.
Exhaust the drainage from the filter etc., and supply
lubricant.
Check the piping port.
Apply the sealing agent to the pipe joint.
Apply appropriate tightening torque.
Move the pressure within the specified pressure range.
Use the rated voltage.
Use a smaller actuator, or replace the valve.
Adjust the speed controller.
Exhaust the drainage from the filter etc., and supply
lubricant.
Replace the valve with one which is compatible with the
voltage.
Replace the valve, and then take countermeasures which
protects against liquid.
Apply the specified voltage.
- 9 -