Delta Electronics VFD-M manual Fault Name, Fault Descriptions, Corrective Actions

1. Ensure that the ambient temperature falls within the specified temperature range.

2. Make sure that the ventilation holes are not obstructed.

3. Remove any foreign objects on the heat sinks and check for possible dirty heat sink fins.

4. Provide enough spacing for adequate ventilation.

Check whether the input voltage falls within the rated AC drive’s input voltage.

Chapter 6 Fault Code Information and Maintenance

Fault Name Fault Descriptions Corrective Actions

The AC drive temperature sensor detects excessive heat.

The AC drive detects that the DC bus voltage has fallen below its minimum value.

The AC drive detects excessive		1.	Check whether the motor is overloaded.
drive output current.
		2.	Reduce torque compensation setting as
Note: The AC drive can withstand
			set in Pr.54.
up to 150% of the rated current for
		3.	Increase the AC drive’s output capacity.
a maximum of 60 seconds.
		1.	Check for possible motor overload.
		2.	Check electronic thermal overload
			setting.
Internal electronic overload trip		3.	Increase motor capacity.
		4.	Reduce the current level so that the
			drive output current does not exceed
			the value set by the Motor Rated
			Current Pr.52.
Motor overload. Check the		1.	Reduce the motor load.
parameter settings (Pr.60 to		2.	Adjust the over-torque detection setting
Pr.62)			to an appropriate setting.
Over-current during acceleration:		1.	Check for possible poor insulation at
			the output line.
1. Short-circuit at motor output.		2.	Decrease the torque boost setting in
2. Torque boost too high.			Pr.54.
3. Acceleration time too short.		3.	Increase the acceleration time.
4. AC drive output capacity is		4.	Replace with the AC drive with one that
	too small.		has a higher output capacity (next HP
			size).
Over-current during deceleration:		1.	Check for possible poor insulation at
			the output line.
1.	Short-circuit at motor output.
		2.	Increase the deceleration time.
2.	Deceleration time too short.
		3.	Replace with the AC drive with one that
3.	AC drive output capacity is
			has a higher output capacity (next HP
	too small.
			size).

6-2 Revision May 2008, ME14, SW V3.04