Fault tracing
Contents of this chapter
This chapter shows how to trace faults with the status LEDs on the Resolver Interface
module.
Diagnostic LEDs
The FEN-21 is equipped with two diagnostic LEDs. The STATUS LED describes the
status of the FEN-21 and the ENC ST LED the status of the encoders. Description of
the LED signals is presented below.
Description
Colour
OK
Green
STATUS LED
Not initialized or communication fault to control
unit
Orange
Not in use
Red
Encoder(s) OK
Green
ENC ST LED
TTL encoder (X51) fault
Red
TTL + encoder (X52) fault
Orange
TTL encoder fault X51 and resolver (X52) fault
Red/orange swapping
TTL encoder (X51) warning
Red flashing
Resolver (X52) warning
Orange flashing
Note: When using FEN-21 with ACS880 the status of ENC ST LED is updated after
encoder/resolver fault reset is done.
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