Troubleshooting
•
Make sure that the supply voltage matches the
adjustable frequency drive voltage.
•
Perform input voltage test.
•
Perform soft charge circuit test.
WARNING/ALARM 9, Inverter overload
The adjustable frequency drive is about to cut out because
of an overload (current too high for too long). The counter
for electronic, thermal inverter protection issues a warning
at 98% and trips at 100%, while giving an alarm. The
adjustable frequency drive cannot be reset until the
counter is below 90%.
The fault is that the adjustable frequency drive has run
with more than 100% overload for too long.
Troubleshooting
•
Compare the output current shown on the LCP
with the adjustable frequency drive rated current.
•
Compare the output current shown on the LCP
with measured motor current.
•
Display the thermal drive load on the LCP and
monitor the value. When running above the
adjustable frequency drive continuous current
rating, the counter increases. When running
below the adjustable frequency drive continuous
current rating, the counter decreases.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the adjustable frequency
drive issues a warning or an alarm when the counter
reaches 100% in 1-90 Motor Thermal Protection. The fault
occurs when the motor runs with more than 100%
overload for too long.
Troubleshooting
•
Check for motor overheating.
•
Check if the motor is mechanically overloaded
•
Check that the motor current set in 1-24 Motor
Current is correct.
•
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.
WARNING/ALARM 11, Motor thermistor over-temp
Check whether the thermistor is disconnected. Select
whether the adjustable frequency drive issues a warning or
an alarm in 1-90 Motor Thermal Protection.
Troubleshooting
•
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 12 to 18, 19, 32 or 33.
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
•
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.
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.
Maintenance, Diagnostics an...
Instruction Manual
40 Danfoss A/S © Rev. 2014-04-10 All rights reserved. MG16E322
77
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