Chapter 7 Troubleshooting
Table 7-1 list the possible faults of FV20, the fault code varies from E001 to E050. Once a fault occurs, you
may check it against the table and record the detailed phenomena before seeking service from your supplier.
Table 7-1 Faults and actions
Hardware over current during acceleration
Hardware over current during deceleration.
Hardware over current during running in constant speed.
Hardware over voltage during acceleration.
Hardware over voltage during deceleration.
Hardware over voltage during running in constant speed.
Software detected over-voltage
22kw above models. IGBT module is detected voltage drop too large.
IGBT module’s heatsink overheat.
Rectifer’s heatsink overheat.
Running current is larger than VFD rated current for long time.
Running current is larger than motor rated current for long time.
VFD can not get communication with host.
Power board/drive board/contactor damage causes contactor abnormal.
Hall/drive board abnormal causes current detective circuit fault.
Keyboard parameter copy error
Auto tunning fault in vector control.
Encoder signal fault in lose-loop control
VFD running current is detected smaller than set value of load lost.
VFD output is short circuit to earth
VFD running speed and encoder detected speed deviation exceeds allowed value.
Extension card and control board SPI communication fault
Software detected over-current during acceleration
Software detected over-current during deceleration
Software detected over-current at constant speed
Internal data processing is abnormalseek help from manufacturer
(MCU communication failed,replace the control board)
Note：
The short circuit of the brake resistance can lead to the damage of brake unit fault.
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