4. Diagnostics/Trouble Shooting
The fault codes listed below are provided to protect both the VFD and the motor from damage. Some of the
codes identify when a condition is occurring that may cause more damage.
4.1 Fault Codes
The VFD output current exceeds the rated current by more than 200%.
This may occur if the motor is locked or the load is excessive.
When the FLA (Full Load Amp) rating of the motor is exceeded, the
internal electronic thermal overload protection circuit is activated to protect
the motor.
If the regenerative energy from the motor or the main power supply
voltage exceeds the DC link specification, the protective circuit activates
to shut off the VFD output.
Communication error between inverter and its operator for all optional
cards. When the Reset signal persists for more than 4 seconds or reading
invalid parameter address will cause the error
If the input voltage drops below the low voltage detection level,
the control circuit may not function properly. So when the input voltage is
below the specified level, the inverter output will shut off.
This occurs when excessive current is seen at the output terminals of the
VFD. This condition causes the VFD to shut off it’s output.
The USP error is indicated when the power is turned on with the
Inverter in RUN state. (Enabled when the USP function selected)
The VFD output is shut off when the EEPROM in the VFD has an error.
The condition can occur due to external noise, excessive temperature, or
other factors.
An Intelligent Input terminal has been programmed to monitor an external
condition and that input has went low(false). When this input goes false a
fault condition occurs.
An Intelligent Input terminal has been programmed to monitor an external
condition and that input has went low(false). When this input goes false a
fault condition occurs.
An Intelligent Input terminal has been programmed to monitor an external
condition and that input has went low(false). When this input goes false a
fault condition occurs.
An Intelligent Input terminal has been programmed to monitor an external
condition and that input has went low(false). When this input goes false a
fault condition occurs.
An Intelligent Input terminal has been programmed to monitor an external
condition and that input has went low(false). When this input goes false a
fault condition occurs.
An Intelligent Input terminal has been programmed to monitor an external
condition and that input has went low(false). When this input goes false a
fault condition occurs.
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