Doc. no.IZ
＊
-OMV0005
24
4-4. Alarm function
If abnormal functioning occurs during operation, the user is alerted by the external output signal or LED operation.
Alarm name
Status of the parallel I/O signals
ON
LED
LED blinking
(Blinks at 1Hz)
Operation after alarm
+ ions are generated
Product
How to release error
after recovery
Power supply
failure
Error signal OFF (Break contact)
Discharge signal OFF(Albeit contact)
Maintenance signal OFF (Albeit contact)
-
PWR
(Green)
Stop
When the connected power
supply voltage is outside of
the specification.
Auto
Incorrect
high voltage
Error signal OFF (Break contact)
Discharge signal OFF(Albeit contact)
Maintenance signal OFF (Albeit contact)
ION/HV
(Red)
-
Stop
When abnormal high voltage
is discharged.
Reset signal input
Turn the power on
again
Output signal
over current
-
-
ION/HV
(Green)
Continue
Over current is present on
the output circuit and
protection circuit is activated
Auto
CPU ALM
Error signal OFF (Break contact)
Discharge signal OFF(Albeit contact)
Maintenance signal OFF (Albeit contact)
-
PWR (green)
Stop
When CPU operates
abnormally due to noise etc.
Turn the power on
again.
ION/HV (red)
NDL (green)
Maintenance
warning
Maintenance signal ON(Albeit contact)
NDL
(Green)
-
Continue
When static neutralization
performance is reduced due
to contamination, wearing or
breakage of emitters.
Input ion discharge
signal
Turn off the power and
then on again.
1) Power supply failure
When the power supply connected to the product is not within the range of 24 V +/-10%, the error signal
will be turned OFF (ON when it is normal), the discharge signal will be turned OFF, and the PWR LED
(green) will flash to indicate the error.
When the failure occurs, ion generation will be stopped.
To resolve the error, reset the product automatically by connecting a power supply which provides a power
supply voltage of 24 V +/-10%.
2) Incorrect high voltage
When incorrect emitter discharge is detected during operation, the error signal will be turned OFF (ON
when it is normal), the discharge signal will be turned OFF, and the ION/HV LED (red) will be ON to indicate
the error.
When the failure occurs, ion generation will be stopped.
The incorrect electric discharge could be caused by condensation or dust on the emitters.
To resolve the error, input the reset signal or supply power again after remedying the cause of the incorrect
electric discharge.
3) Output signal over current
When excessive current flows to the output circuit, the current will be limited to protect the circuit and the
ION/HV LED (green) will flash to indicate the error.
The product operates even when excessive current is generated in the output circuit.
To resolve the error, reset the product automatically by reducing the current to the output circuit down to 40
mA or less.
4) CPU error
When the CPU makes an abnormal operation due to noise or other reasons, the error signal will be turned
OFF (ON when it is normal), and the PWR LED (green), ION-HV LED (red) and NDL LED (green) will flash to
indicate the error.
When the failure occurs, ion generation is stopped.
To prevent noise, perform the following actions and take countermeasures.
1. Keep the product away from sources of noise.
2. Route the power line and cable of the product separately.
3. Install a noise filter to the power supply of the product.
To resolve the error, supply power again after fixing the cause of the error.
5) Maintenance warning
The maintenance signal is ON when static electricity neutralization performance has decreased due to
contamination, wear or damage to the emitters. The NDL LED (green) will turn ON to indicate that cleaning
or replacement of the emitters needs to be performed.
The product continues operation even when the maintenance warning has been generated.
When emitters are contaminated, the error can be solved by cleaning them. However, when they are worn
out or damaged, it is necessary to replace the emitter assembly.
To resolve the error, input the discharge stop signal or supply power again after remedying the cause of
the error.
When the female threads for piping option is used, the maintenance signal will turn ON if the nozzle
pressure increases (causing the ion generation to decrease) due to the nozzle type.
