1) Depending on the fault received they may be two different reactions from the keypad LED:
a) Flashing Green indicating either:
i) Fire Alarm signal is currently being received and preventing the fan from operating.
ii) Minor fault that did not require the fan to shut down but requires an operator reset.
1) In this case the soft key "DIR" to reverse direction will change to "RESET".
a) Once "RESET" is pushed the fault will clear and the LED will return to solid
green.
b) A record of this fault may be retrieved from the "Fault Logger".
b) Solid Red indicating the alarm shown on the screen caused the fan to shut down.
Alarm 2023 "Emergency Stop" is shown below. This is caused by the Fire Alarm input. The LED will be Flashing Green.
Flashing Green LED
A "Fire Alarm" activation will read "Emergency
Stop" and will stay active until the input from the
alarm system is removed. This screen will toggle
with the Home Screen showing Hz, Amps, and %
of speed all reading zero.
You can create this alarm for testing purposes by
removing the jumper running from terminal
position 9 to 14.
Both jumpers must be removed once the Fire
Alarm connection is made.
Troubleshooting Tips:
Test the VFD Control:
•
Remove power at the breaker supplying the control and perform Lock Out / Tag Out procedures.
•
Disconnect the output power wires running from the VFD to the Fan Motor.
•
Remove LOTO and restore power to the VFD.
•
Turn the VFD on and watch for the proper start up sequence.
o
"ABB" screen comes up for a few seconds.
o
Fan "home" screen comes up showing fan performance.
•
Operate the VFD as if the fan were connected.
o
The VFD should work normally as the screen indicates VFD output, not fan operation.
If the VFD does not operate properly or faults/alarms are triggered the VFD should be
replaced.
Test the Motor Housing Assembly:
•
Turn the fan off at the VFD Control and perform Lock Out / Tag Out procedures.
•
Turn the fan by hand in both directions. The fan should turn easily in both directions. If it does not observe:
o
Look for any mechanical interference between the blades/hub and the fan frame.
o
Feel for grinding, the movement of the fan should be smooth and quiet.
o
Listen for grinding or any metal on metal contact.
•
The GFY gearmotor is a motor and gearbox. Anything that looks or sounds other than you'd expect from a
motor and gearbox is a likely indication of a problem. The Motor Housing Assembly should be replaced.
ACS355 CONTROL TROUBLESHOOTING
•
If possible, swap the VFD control with another fan to isolate the problem.
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Z-TECH™
FAN
Installation and Technical Operations
®
GO FAN YOURSELF
