78 E-Clipse Bypass Configurations for ACH550 Drives
Diagnostics and Troubleshooting
Fault Resetting
Warning! If an external source for start command is selected and it is active,
the system may start immediately after fault reset.
Flashing Red LED
To reset the bypass for faults indicated by a flashing red LED:
• Turn off the power for 5 minutes.
Red LED
To reset the bypass for faults indicated by a red LED (on, not flashing), correct the
problem and do one of the following:
• From the bypass control panel, press OFF/RESET
• Turn off the power for 5 minutes.
Depending on the value of 1607,
FAULT RESET SELECT, the following could also be
used to reset the drive:
• Digital input
• Serial communication
When the fault has been corrected, the motor can be started.
3204 STACK OVERFLOW Program cycle is
overloaded
NA Contact ABB with
information that
proceeded fault
Cycle Power
Replace RBCU
3205 UNKNOWN CB Bypass control board
type is unknown.
Firmware is not
compatible with control
board in RBCU.
Firmware 93F and
greater compatible with
all RCBU hardware.
Firmware 93D and
earlier can only be
loaded in RBCU Rev D
and earlier.
3206 UNKNOWN DRIVE Drive reports rating not
found in bypass
software
Drive does not match
drives configured in
bypass RBCU
Replace RBCU or
reload with most current
firmware
3207 UNKNOWN BYPASS NA NA Replace RBCU or load
most current firmware
Contact ABB at 1-800-
HELP-365 option 4
Replace RBCU or load
most current firmware
Fault
Code
Fault Name In Panel Fault Possible Cause Corrective Action
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