Honeywell 3G SmartVFD HVFD3D3A0015 Installation And User Manual page 69

WARNING/ALARM 11, Motor thermistor over-temp
Check whether the thermistor is disconnected. Select whether the adjustable fre-
quency drive issues a warning or an alarm in 1-90 Motor Thermal Protection.
Troubleshooting
WARNING/ALARM 12, Torque limit
The torque has exceeded the value in 4-16 Torque Limit Motor Mode or the value in
4-17 Torque Limit Generator Mode. 14-25 Trip Delay at Torque Limit can change
this warning from a warning-only condition to a warning followed by an alarm.
Troubleshooting
WARNING/ALARM 13, Overcurrent
The inverter peak current limit (approximately 200% of the rated current) is
exceeded. The warning lasts about 1.5 s, then the adjustable frequency drive trips
and issues an alarm. Shock loading or quick acceleration with high inertia loads
can cause this fault. If the acceleration during ramp up is quick, the fault can also
appear after kinetic backup.
If extended mechanical brake control is selected, trip can be reset externally.
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• Ensure that Motor data in parameters 1-20 to 1-25 are set correctly.
• If an external fan is in use, check in 1-91 Motor External Fan that it is
selected.
• Running AMA in 1-29 Automatic Motor Adaptation (AMA) tunes the
adjustable frequency drive to the motor more accurately and reduces
thermal loading.
• Check for motor overheating.
• Check if 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). Also check that the terminal switch for 53 or 54
is set for voltage. Check 1-93 Thermistor Source selects terminal 53 or 54.
• When using digital inputs 18 or 19, check that the thermistor is connected
correctly between either terminal 18 or 19 (digital input PNP only) and
terminal 50. Check 1-93 Thermistor Source selects terminal 18 or 19.
• If the motor torque limit is exceeded during ramp-up, extend the ramp-up
time.
• If the generator torque limit is exceeded during ramp-down, extend the
ramp-down time.
• If torque limit occurs while running, possibly increase the torque limit. Make
sure that the system can operate safely at a higher torque.
• Check the application for excessive current draw on the motor.
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