WARNING/ALARM 9, Inverter overload
The frequency converter has run with more than 100%
overload for too long and is about to cut out. The counter
for electronic thermal inverter protection issues a warning
at 98% and trips at 100% with an alarm. The frequency
converter cannot be reset until the counter is below 90%.
Troubleshooting
•
Compare the output current shown on the LCP
with the frequency converter rated current.
•
Compare the output current shown on the LCP
with the measured motor current.
•
Show the thermal frequency converter load on
the LCP and monitor the value. When running
above the frequency converter continuous
current rating, the counter increases. When
running below the frequency converter
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 1 of these options:
•
The frequency converter issues a warning or an
alarm when the counter is >90% if
parameter 1-90 Motor Thermal Protection
is set to
warning options.
•
The frequency converter trips when the counter
reaches 100% if
parameter 1-90 Motor Thermal
Protection
is set to trip options.
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
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
.
•
Running AMA in
parameter 1-29 Automatic Motor
Adaptation (AMA)
tunes the frequency converter
to the motor more accurately and reduces
thermal loading.
WARNING/ALARM 11, Motor thermistor overtemp
Check whether the thermistor is disconnected. Select
whether the frequency converter issues a warning or an
alarm in
parameter 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 that
parameter 1-93 Thermistor Resource
selects terminal 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 terminal 50. Select
the terminal to use in
parameter 1-93 Thermistor
Resource
.
WARNING/ALARM 12, Torque limit
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.
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, 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, Over current
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts approximately
1.5 s, then the frequency converter 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 back-up.
If extended mechanical brake control is selected, a trip can
be reset externally.
Troubleshooting
•
Remove the power and check if the motor shaft
can be turned.
•
Check that the motor size matches the frequency
converter.
•
Check that the motor data is correct in
parameters
1-20
to
1-25
.
Maintenance, Diagnostics, a...
VLT
®
AutomationDrive FC 301/302
24
Danfoss A/S © 05/2018 All rights reserved.
MG33AT02
7
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