Fault Codes
‑713‑
Fault Name Display Possible Cause Action
Encoder fault E20.00 Encoder disconnected Restore the connection.
Ensure proper wiring of the PG cable.
Ensure proper wiring of the PG cable and power
supply.
Ensure consistency between the encoder pulses
per revolution and the value of F1‑27.
Ensure proper wiring of the AB signal cable.
E20.01 Encoder fault
E20.02 Encoder disconnected
E20.03 Encoder fault during no‑load
auto‑tuning of the synchronous
motor
E20.04 Encoder fault during no‑load
auto‑tuning of the synchronous
motor
E20.06 Encoder fault during with‑load
auto‑tuning of the synchronous
motor
E20.07 Encoder fault during no‑load
auto‑tuning of the synchronous
motor
E20.08 Encoder fault during no‑load
auto‑tuning of the synchronous
motor
E20.09 Encoder fault during auto‑tuning
of the synchronous motor
Check the encoder Z signal and wiring of the PG
card.
E20.10 Synchronous motor encoder
fault
E20.11 The encoder is faulty during FVC
no‑load auto‑tuning of the
asynchronous motor.
Ensure that the encoder is properly connected.
Ensure consistency between the encoder pulses
per revolution and the value of F1‑27.
E20.12 Excessive deviation between the
encoder feedback speed and the
speed estimated by SVC
Check for encoder disconnection.
Ensure proper setting of motor parameters.
Ensure that motor auto‑tuning is performed.
E20.13 Resolver encoder disconnected Check the wiring of the encoder.
E20.17 23‑bit encoder disconnected Check the wiring of the 23‑bit encoder.
EEPROM read/write
fault
E21.01 EEPROM read/write abnormality For communication write parameters, check the
RAM addresses and the RAM address mapping of
the parameters. For details, see 6.2.4 Parameter
Address Rules.
If the EEPROM chip is damaged, contact Inovance
to replace the control board.
E21.02
E21.03
E21.04
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