CKD EVD-1000 Series - Troubleshooting; Problems, Causes, and Solutions

SM-A20758-A/3 5. TROUBLESHOOTING
56 2020-10-06
5. TROUBLESHOOTING
Problems, Causes, and Solutions
If the product does not operate as intended, check the table below for a possible solution.
Problem
Cause
Solution
Setting cannot be changed.
Key is locked.
Release the key lock according to "3.2.2 Key lock" and
change the settings.
Operation keys do not work.
Replace the product.
Pressure does not display.
Automatic power off function is
enabled.
Press any operation key.
* If the display turns on and then off after one minute, the
automatic power off function is enabled.
* Refer to "3.2.4 Automatic power off" to disable the
automatic power off.
Power supply is not connected
correctly.
Connect the rated power correctly.
There is disconnection inside
EVD.
Replace the product.
Displayed pressure is abnormal.
Primary side pressure is
insufficient.
Maintain the primary side supply pressure so that it is at
least the minimum working pressure.
There is leakage on secondary
side piping.
Check if there is leakage from piping.
There is a failure in pressure
sensor.
Replace the product.
Make sure that excessive pressure does not apply on the
secondary side due to pressure entering from other pipes.
Switch output does not turn ON.
Switch output is disabled.
Refer to "3.2.5 Switch output ".
There is a failure in EVD.
Replace the product.
Switch output does not turn OFF.
There is a failure in EVD.
Replace the product.
Loud noise is generated.
There is significant leakage which
is greater than maximum flow
rate.
Using the product in this state will shorten the service life
extremely. Reconsider the usage.
There is air entering from
secondary side piping which
exceeds relief performance.
Using the product in this state will shorten the service life
extremely. Reconsider the usage.
Power is turned on and input
signal is set with no primary side
pressure supplied.
Supply the primary side pressure and then turn on the
power supply and set the input signal.
Set input signal is greater than
primary side pressure.
Maintain the primary side supply pressure so that it is at
least the minimum working pressure.
Primary side pressure is less than
minimum working pressure.
Maintain the primary side supply pressure so that it is at
least the minimum working pressure.
1%FS or more pressure is output
even if power is turned off.
Zero point is increased with
zero/span adjustment.
If the zero point is increased, the set pressure is output
even when the power is turned off.
If atmospheric pressure condition is required, install a
3-way valve on the secondary side.
Power is turned off while input
signal is set.
Turn on the power and set the input signal to 0%.
Product has been left with power
turned off and with primary side
pressure supplied for a long
period.
If the product has been left unused for a long period, set the
primary side pressure to zero.
If the secondary side pressure rises, turn on the power and
set the input signal to 0%.
There is a failure in EVD.
Make sure that there is no abnormality in piping and wiring
and then replace the product.