Troubleshooting - SMC Networks IR1010 Operation Manual

7. Troubleshooting

No. Trouble
The set pressure
1
is decreasing.
The set pressure is
2 increased or
decreased over time.
3 Response is slow.
The leakage at the
4 EXH port has
increased.
The set pressure
5 changes
periodically.
Pressure does not
6
increase.
Repeatability is
7
poor.
The product is
8
chattering.
There is leakage at
the places other
9
than the bleed hole
and EXH port.
Possible cause
Fluctuation of flow rate at the
downstream side
Clogging of fixed orifice due to moisture,
condensation or foreign matter
Leakage due to
deterioration of
rubber parts
Frequent switch of on and off at the
downstream side
The decrease of pressure in the
bonnet
Change of the product over time
Clogging of fixed orifice due to moisture,
condensation or foreign matter
Increased consumed flow rate at the
downstream side (due to leakage, etc.)
Leakage due to
deterioration of
rubber parts
Foreign matter stuck to the seating
part
Fluctuation of supply pressure
Change of ambient and fluid
temperature
Insufficient supply pressure
Clogging of fixed orifice due to moisture,
condensation or foreign matter
Same as trouble 1.
Same as trouble 2.
Leakage at the downstream side
Problem with the piping at the
downstream side
Leakage due to deterioration of
rubber parts
-13-
Countermeasures
Reset the pressure.
Return the flow rate at the
downstream side to the initial rate.
Install a filter and mist separator and
use clean air.
Replace with an ozone resistant
Ozone
product (80- series).
Change the material of piping, etc.
Copper
from copper.
Avoid using at high temperature or
Temperature
low temperature.
Petroleum Prevent the oil from entering the
type oil ambient environment and fluid.
Reset the pressure again.
Set the pressure in the bonnet,
which is a standard pressure, to
atmospheric pressure.
Reset the pressure again.
Install a filter and mist separator and
use a clean air.
Eliminate leakage in the piping.
Replace with an ozone resistant
Ozone
product (80- series).
Change the material of piping, etc.
Copper
from copper.
Avoid using at high temperature or
Temperature
low temperature.
Petroleum Prevent the oil from entering the
type oil ambient environment and fluid.
Install a filter and mist separator and
use clean air.
Perform flushing by releasing the
downstream side to atmosphere, etc.
Install the regulator in front to reduce
the fluctuation.
Prevent the effect of temperature
change.
Increase the supply pressure.
Install a filter and mist separator and
use clean air.
Refer to problem 1.
Refer to problem 2.
Eliminate leakage in the piping.
Chattering occurs depending on the
operating conditions. Consult SMC.
Consult SMC.