Electro-pneumatic Regulator ER100
Instruction Manual
rev. 2.0
page 36 / 38
Symptom Cause
Solution
The supply pressure is output
without change.
Failure of ER
Check the piping and wiring for faults
and replace the product.
In case of an analog type, check if the
common of input signals is connected
to the ground of the power supply.
Error in input signal
In case of a parallel type, check the
relationship between the input bit and
wiring again.
The pressure is out of control.
Failure of pressure sensor
Replace the product.
Check if routing from another piping
causes an excessive pressure in the
secondary circuit.
The primary pressure is not
supplied.
Check the supply pressure.
No pressure on the output.
Wiring error
Check the wiring again.
Check if connectors are connected
securely.
The pressure does not rise to
the setting.
Low supply pressure Supply the primary pressure at least at
the minimum operating pressure.
The pressure does not
descend.
The exhaust port path is
blocked.
Examine the layout so that exhaust air
is discharged from the R and EXH ports.
The source voltage is unstable. Use a stabilized power supply matching
the specifications of the product.
The input signal is unstable.
Check the effects of noise.
Connect the shield to the ground of the
power supply.
The primary pressure is
unstable.
Install a regulator in the primary circuit
to stabilize the primary pressure of ER.
The pressure is unstable.
Leakage from piping
Check for leaks from primary and
secondary piping.
The supply pressure is too
large when compared with the
control pressure.
Supply the primary pressure at least at
the minimum operating pressure while
lowering it as far as possible.
Pulsating pressure
Mismatch of secondary piping
volume, leakage, entry of dirt,
etc.
Pulsation is avoided in some cases
through modification of the piping
condition. If possible, examine the
piping diameter, modification of the
load volume, examination of leakage
and so on of the secondary circuit.
