Troubleshooting The Vfd - Bigass 4900 Manuel D'installation

Troubleshooting the VFD

Some VFD issues can be resolved before requesting service. Review the below warning and fault messages and
diagnostics before contacting Customer Service for support.
Status and warning messages
Message Description
EPM Contains Earlier Firmware Version
This error will appear when you try to change a VFD parameter and the EPM firmware is older
than the VFD's firmware.
To correct this condition, press the STOP button, and then press the Memory/Enter button.
Use the UP/DOWN button to scroll to P199. Press the Memory/Enter button. Use the UP/DOWN
button to scroll to a setting of 5. Press the Memory/Enter button to save the change. The VFD is
now able to read/write the EPM properly.
Current Limit
Verify proper motor wiring and HP. Check for short circuits. Increase acceleration time.
Decel Override
Fan is stopping too fast, causing a DC Buss overvoltage. Drive is backing off the deceleration
rate to prevent HP (Over-voltage) fault.
Error
Invalid data or invalid command entered.
Fast Current Limit
Overload
Check for short circuits throughout the load. Increase accel time.
Flying Restart Attempt after Fault
Program Attempt Made in OEM Settings Mode
(P199=1)
Parameter changes are not permitted.
Reset EPM to OEM Defaults Failure
The EPM's OEM dataset is missing or corrupt.
Fault Lockout
Auto restart failure after five unsuccessful restart attempts.
Start Pending
The drive has tripped and is waiting to restart.
Fan Stopped
Output frequency is 0 Hz.
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