What to doCauseFault indication/Fault
Check voltage setting.Chopper voltage setting too low.Chopper starts to function at
too low a DC voltage.
Check voltage setting.Chopper voltage setting too high.Inverter trips on fault 3210 DC
link overvoltage.
Check parameters of all inverters.
Check duty cycle and resistor cooling.The maximum brake cycle exceeded
or resistor cooling insufficient.
Brake resistor or chopper
overheats.
LEDs
￭ Control panel and panel platform/holder LEDs
The ACX-AP-x control panel has a status LED. The control panel mounting platform or
holder has two status LEDs. For their indications, see the following table.
IndicationLEDLocation
The unit is functioning normally.Continuous greenControl panel
Data is transferred between the PC and the unit through the USB
connection of the control panel.
Flickering green
There is an active warning in the unit.Blinking green
There is an active fault in the unit.Continuous red
There is a fault that requires the stopping and restarting of the
drive/converter/inverter.
Blinking red
The Bluetooth interface is enabled, in discoverable mode, and
ready for pairing.
Blinking blue (ACS-
AP-W only)
Data is being transferred through the Bluetooth interface of the
control panel.
Flickering blue
(ACS-AP-W only)
There is an active fault in the unit.RedControl panel
mounting platform or
holder (with the con-
trol panel removed)
Power supply for the control unit is OK.Green
￭ Control unit LEDs
This table shows the LEDs visible on the BCU control unit.
IndicationColorLED
Battery voltage of the real-time clock is OK (higher than 2.8 V).
When the LED is not lit,
GreenBATT OK
• battery voltage is below 2.8 V,
• the battery is missing, or
• the control unit is not powered.
Internal voltage OKGreenPWR OK
The control program indicates that the equipment is faulty. See
the appropriate firmware manual.
RedFAULT
Writing to SD card in progress.YellowWRITE
72 Fault tracing
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