Danfoss VLT Ea4, Operating Manual

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Troubleshooting
Compare the output current shown on the LCP with the drive rated current.
Compare the output current shown on the LCP with the measured motor current.
Show the thermal drive load on the LCP and monitor the value.
When running above the drive continuous current rating, the counter increases.
When running below the drive continuous current rating, the counter decreases.
6.9.12 WARNING/ALARM 10, Motor Overload Temperature
Cause
According to the electronic thermal protection (ETR), the motor is too hot.
This warning/alarm is controlled by
parameter 1-90 Motor Thermal Protection :
If the parameter is set to warning options, the drive issues a warning or an alarm when the counter is >90%.
If the parameter is set to trip options, the drive trips when the counter reaches 100%.
The fault occurs when the motor runs with more than 100% overload for too long.
Troubleshooting
Check for motor overheating.
Check whether the motor is mechanically overloaded.
Check that the motor current set in
parameter 1-24 Motor Current is correct.
Ensure that the motor data in parameters 1-20 to 1-25 is set correctly.
If an external fan is in use, check that it is selected in parameter 1-91 Motor External Fan .
Run AMA in parameter 1-29 Automatic Motor Adaptation (AMA) . This tunes the drive to the motor more accurately and reduces
thermal loading.
6.9.13 WARNING/ALARM 11, Motor Thermistor Overtemp
Cause
The motor thermistor indicates that the motor temperature is too high.
Troubleshooting
Check for motor overheating.
Check that the thermistor is securely connected.
Check whether the motor is mechanically overloaded.
When using terminal 53 or 54:
Check that the thermistor is connected correctly between either terminal 53 or 54 (analog voltage input) and terminal 50
(+10 V supply).
Check that the terminal switch for 53 and 54 is set for voltage.
Check that
parameter 1-93 Thermistor Resource selects 53 or 54.
When using terminal 18, 19, 31, 32, or 33 (digital inputs):
Check that the thermistor is connected correctly between the digital input terminal used (digital input PNP only) and termi-
nal 50.
Select the terminal to use in
parameter 1-93 Thermistor Resource .
6.9.14 WARNING/ALARM 12, Torque Limit
Cause
The torque has exceeded the value in parameter 4-16 Torque Limit Motor Mode or the value in parameter 4-17 Torque Limit Generator
Mode . Parameter 14-25 Trip Delay at Torque Limit can change this warning from a warning-only condition to a warning followed by
an alarm.
AQ434333248451en-000101 / 130R1286 50 | Danfoss A/S © 2023.01
Operating the Drive
VLT Ea4 Parallel Drive Modules
Operating Guide