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Carrier VFD Quick Reference
6.5 Identifying Fatal Fault Codes and Recovering
Fatal fault codes are distinguished by the letter F preceding the code. They normally
indicate a malfunction of the microprocessor on the Regulator board. In some cases,
fatal fault codes can be reset and the drive can be re-started. Table 6.4 lists the fatal
fault codes which can be reset. If any other fault code appears on the display, you will
need to replace the Regulator board.
If the fault code FUE appears in error log entry 0, it indicates a fatal fault occurred as
power was lost. Contact Reliance Electric or observe the drive for subsequent fatal
errors before turning off power. Fatal fault codes are lost after power loss.
Table 6.4 – Fatal Fault Codes That Can Be Reset
Code Fault Description Fault Cause Corrective Action
F 3 Encoder power-up
diagnostic error.
Encoder voltage is less than
10 V.
Turn off power to the drive. Disconnect
the encoder wiring from the terminal strip.
Turn power to the drive back on.
If the F3 error does not occur again, the
problem is in the wiring between the drive
and the encoder.
If the F3 error does occur again, the
problem is in the Regulator board, which
should be replaced.
F 60 Option port identification
error.
The option board could not
be identified by the regulator.
Check the ribbon cable between the
Regulator board and the option board.
Check the option board’s jumper settings.
Refer to the appropriate option board
instruction manual for more information
about the option board.
F 61 Option board power-up
diagnostic failure.
Option board has failed one
or more power-up
diagnostics.
Check the ribbon cable between the
Regulator board and the network option
board. Replace the option board if
necessary.
Refer to the appropriate option board
instruction manual for more information
about the option board.
F 62
or
F 26
Option board runtime
error.
During operation, the option
board watchdog failed or
handshaking with the drive
failed.
If intermittent, check for causes of noise,
for proper grounding, and that outputs
are not exceeding rated current
capacities.
Replace the option board if necessary.
Refer to the appropriate option board
instruction manual for more information
about the option board.