Troubleshooting
Problem
Possible Cause
Corrective Action
No power
(blank display)
Blown fuse
Disconnect power to the unit and remove the fuse from the rear of the
unit. Using a multi meter, check the resistance of the fuse. If the fuse is
open, use the spare fuse provided.
LCD backlight failed
With the unit plugged in and the power switched ON, closely inspect the
LCD display. If characters are faintly visible, then the LCD backlight is no
longer functional. Contact Nordson EFD.
Adjust the display contrast. Refer to “Adjusting the LCD Contrast.”
DRV OUT not
responding
to an initiate
signal
(solenoid
valve does not
operate)
Controller disabled
Enable the controller by pressing and holding the ENABLE/DISABLE key
(
) for 4 seconds until the controller is enabled.
ON or OFF on
DRIVERS screen set
to 0.0000 (sec)
Set ON or OFF to a non-zero value. Refer to “Setting Up the Driver
Outputs.”
DCNT on DRIVERS
screen set to 0000
Set DCNT to a non-zero value. Refer to “Setting Up the Driver Outputs.”
Foot pedal used and
signal de-bounce
disabled
Use the de-bounce operation (dbnc) serial command to enable foot
pedal de-bounce. Refer to Appendix B, “RS-232C Connection Technical
Information.”
Problem with initiate
signal integrity
(Voltage Initiate)
Verify that the signal being used on the voltage initiate circuit is a clean,
bounce-free signal (5–24 VDC).
Incorrect VOLTS
setting on the second
DRIVERS screen
Set VOLTS to an appropriate value for the valve being used (for example,
24 V). Refer to “Setting Up the Driver Outputs.”
More than one
Voltage Initiate signal
present
Verify that there is either a foot pedal or a voltage initiate signal present
at one time. If these signals overlap, they can cancel the initiate signal.
Current exceeded
1100 mA on the DRV.
OUT pins
Remove all connections to the DRV. OUT pins, switch off the controller,
and allow the controller to cool for 10 minutes.
Problem with wiring
integrity
Ensure that the wiring is correctly stripped and that the conductors are
making contact with the screw terminal connector.
Voltage Initiate
applied to the wrong
pins
Verify that the Voltage Initiate is applied to the pins corresponding to the
desired DRV. OUT output. Refer to “Setting Up the Driver Outputs.”
Driver mode set to
OFF on first DRIVERS
screen
Set the DRIVERS mode to ON, PULS, or STDY. Refer to “Setting Up the
Driver Outputs.”
Flashing System
Alarm IN
Remove or disable the system alarm. The unit will not initiate if there
is an input alarm present. Refer to “Clearing an Alarm Input or Auto
Increment Mode Alarm.”
Continued on next page
ValveMate 9000 Controller
56
www.nordsonefd.com [email protected]
800-556-3484 Sales and service of Nordson EFD dispensing systems are available worldwide.
