PICO
Toµch
Series Controllers
49
www.nordsonefd.com [email protected]
+1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Troubleshooting
General Troubleshooting
NOTE:
To troubleshoot alarm codes, refer to “Alarm Code Troubleshooting” on page 50.
Problem
Possible Cause
Corrective Action
Fluid leaks
Valve not powered ON
Verify that the valve POWER is ON.
Insufficient closing voltage
Increase the closing voltage of the valve.
Improper profile selected
If RAMP is not selected for the open and close WAVE
PROFILE settings, verify that the selected profile is
correctly programmed.
Worn or damaged valve
Refer to the troubleshooting section of the valve
operating manual.
Damaged driver
Contact Nordson EFD.
Valve will not power
ON
Loose or damaged cable /
connection
Verify that both valve input cables are connected.
Check the integrity of all cables and connections.
Alarm condition present
Correct and clear any pending alarms.
Improper profile selected
If RAMP is not selected for the open and close WAVE
PROFILE settings, verify that the selected profile is
correctly programmed.
Switch off the controller and wait 5 seconds for the
valve to fully discharge. Disconnect and reconnect all
cables to the controller, then switch on the controller. If
a system restart does not correct the problem, contact
Nordson EFD.
Controller not
responding to an
initiate signal
Alarm condition present
When an alarm condition is present, the controller will
not initiate. Correct and clear any pending alarms.
Problem with initiate signal
integrity
Verify that the signal being user on the USET (Initiate)
circuit is a clean, bounce-free signal (5–24VDC).
Problem with wiring integrity
Ensure that the wiring is correctly stripped and that
the conductors are making contact on the 15 pin
connector
Valve not powered ON
Verify that the valve POWER is ON.
LCD not responding
to touches
LCD requires calibration
Refer to “Calibrating the LCD” on page 42 to
recalibrate the LCD.
Display screen
flashes white and is
unresponsive
Failed real-time clock battery
Remove or replace the battery. Contact your Nordson
EFD representative for the battery replacement
instructions.
NOTE:
The battery powers only the real-time clock. Its
removal or replacement will not affect any functions.
