370 Diagnostics and maintenance
ACH550-01 User's Manual
Diagnostics displays
The drive detects error situations and reports them using:
• green and red LED on the body of the drive
• status LED on the control panel (if a HVAC control panel is
attached to the drive)
• control panel display (if a HVAC control panel is attached to
the drive)
• Fault Word and Alarm Word parameter bits (parameters 0305
to 0309). See Group 03: FB ACTUAL SIGNALS.
The form of the display depends on the severity of the error. You
can specify the severity for many errors by directing the drive to:
• ignore the error situation
• report the situation as an alarm
• report the situation as a fault.
Red – faults
The drive signals that it has detected a severe error, or fault, by:
• enabling the red LED on the drive (LED is either steady or
flashing)
• showing the steady red status LED on the control panel (if
attached to the drive)
• setting an appropriate bit in a Fault Word parameter (0305 to
0307)
• overriding the control panel display with the display of a fault
code
• stopping the motor (if it was on).
The fault code on the control panel display is temporary.
Pressing any of the following removes the fault message:
MENU, ENTER, UP key or DOWN key. The message reappears
after a few seconds if the control panel is not touched and the
fault is still active.
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