Chapter 14 Fault Codes and Descriptions |CFP2000 Series
14-1
Chapter 14 Fault Codes and Descriptions
* Refer to setting of Pr06-17~Pr06~22.
ID* Fault Name Fault Descriptions Corrective Actions
1
ocA
Oc at accel
Fault
Over-current during
acceleration
(Output current exceeds
triple rated current during
acceleration.)
1. Short-circuit at motor output: Check for possible
poor insulation at the output.
2. Acceleration Time too short: Increase the
Acceleration Time.
3. AC motor drive output power is too small: Replace
the AC motor drive with the next higher power
model.
2
ocd
Oc at decel
Fault
Over-current during
deceleration
(Output current exceeds
triple rated current during
deceleration.)
1. Short-circuit at motor output: Check for possible
poor insulation at the output.
2. Deceleration Time too short: Increase the
Deceleration Time.
3. AC motor drive output power is too small: Replace
the AC motor drive with the next higher power
model.
3
ocn
Oc at normal SPD
Fault
Over-current during
steady state operation
(Output current exceeds
triple rated current during
constant speed.)
1. Short-circuit at motor output: Check for possible
poor insulation at the output.
2. Sudden increase in motor loading: Check for
possible motor stall.
3. AC motor drive output power is too small: Replace
the AC motor drive with the next higher power
model.
4
GFF
Ground fault
Fault
Ground fault
When (one of) the output terminal(s) is grounded,
short circuit current is more than 50% of AC motor
drive rated current, the AC motor drive power module
may be damaged.
NOTE: The short circuit protection is provided for AC
motor drive protection, not for protecting the user.
1. Check the wiring connections between the AC
motor drive and motor for possible short circuits,
also to ground.
2. Check whether the IGBT power module is
damaged.
3. Check for possible poor insulation at the output.
5
occ
Short Circuit
Fault
Short-circuit is detected
between upper bridge and
lower bridge of the IGBT
module
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