Inovance SV670N Series - Page 78

Description of Fault Codes
‑77‑
Cause
Confirming Method
Solution
Motor three phase cable
breakage
Check the wiring of U/V/W
power cables.
1. Check whether the power
cables are disconnected
or in poor contact. Re‑
connect the power cables.
2. Replace the servo motor.
● E939.1: Phase‑U power cable disconnected
Cause
Confirming Method
Solution
Motor U phase power cable
breakage
Check the wiring of the
phase‑U power cable.
1. Check whether the power
cables are disconnected
or in poor contact. Re‑
connect the power cables.
2. Replace the servo motor.
● E939.2: Phase‑V power cable disconnected
Cause
Confirming Method
Solution
Motor V phase power cable
breakage
Check the wiring of the
phase‑V power cable.
1. Check whether the power
cables are disconnected
or in poor contact. Re‑
connect the power cables.
2. Replace the servo motor.
● E939.3: Phase‑W power cable disconnected
Cause
Confirming Method
Solution
Motor W phase power cable
breakage
Check the wiring of the
phase‑W power cable.
1. Check whether the power
cables are disconnected
or in poor contact. Re‑
connect the power cables.
2. Replace the servo motor.
● EA33.0: Encoder read/write check error
Cause:
Encoder parameters are abnormal.