Troubleshooting
7-8
Part 1602966−05
E 2015 Nordson Corporation
Corrective ActionPossible CauseProblem
18. Color change cycle
started, gun
positioner stopped at
forward limit switch
Oscillator not at bottom of stroke
(USA only)
Oscillator must be at bottom of stroke
for spray guns to be in position for
gun blowoff. Blowoff will not start
until bottom of stroke sensor is on
and remains on.
Check oscillator position.
ColorMax not selected on iControl
gun positioner configuration
screen (USA only)
Check gun positioner configuration.
Oscillator not stopped Oscillator gets stop command from
gun positioner controller. Refer to
your system electrical drawings.
Contact Nordson technical support.
USA only − Oscillator bottom of
stroke sensor not sending signal to
main system panel. Sensor detects
rotating lever arm. Make sure sensor
is positioned to detect arm and check
wiring and connections to sensor.
Reciprocator not at Park position Reciprocator must be at Park position
for spray guns to be in position for
gun blowoff. Blowoff will not start
until Park position is achieved.
Check reciprocator position. Make
sure Park position is configured
within stroke range. Refer to iControl
Operator Interface manual for
reciprocator configuration settings.
19. Color change cycle
started, blowoff air
does not turn on
No air supply to solenoid valve or
process valve, failed valve, or bad
electrical connection
Solenoid valve in the main system
panel is activated by a signal from
the gun positioner control panel.
Solenoid valve sends air signal to
large pilot valve that provides air to
the blowoff nozzles.
Make sure main system panel air
supply is on.
Check solenoid valve output. If
solenoid coil is energized but no air
flows from valve, replace valve.
Check air tubing to pilot valve.
Check process valve operation.
Check the wiring and connections
between the gun positioner controller
and solenoid valve.
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