WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the adjustable frequency
drive gives a warning or an alarm when the counter
reaches 100% in
1-90 Motor Thermal Protection
. The fault
occurs when the motor is overloaded by more than 100%
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 overtemp
The thermistor might be disconnected. Select whether the
adjustable frequency drive gives a warning or an alarm in
1-90 Motor Thermal Protection
.
Troubleshooting
•
Check for motor overheating.
•
Check if the motor is mechanically overloaded.
•
Check that the thermistor is connected correctly
between either terminal 53 or 54 (analog voltage
input) and terminal 50 (+10 V supply) and that
the terminal switch for 53 or 54 is set for voltage.
Check that
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.
•
If using a thermal switch or thermistor, check that
the programming of
1-93 Thermistor Resource
matches sensor wiring.
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 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. Be sure 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. This fault may be caused by shock loading or fast
acceleration with high inertia loads. If extended mechanical
brake control is selected, trip can be reset externally.
Troubleshooting
•
Remove power and check if the motor shaft can
be turned
•
Check that the motor size matches the adjustable
frequency drive
•
Check parameters 1-20 to 1-25 for correct motor
data
ALARM 14, Ground fault
There is current from the output phases to ground, either
in the cable between the adjustable frequency drive and
the motor or in the motor itself.
Troubleshooting:
•
Remove power to the adjustable frequency drive
and repair the ground fault
•
Check for ground faults in the motor by
measuring the resistance to ground of the motor
leads and the motor with a megohmmeter
•
Perform current sensor test
Warnings and Alarms
VLT
®
Refrigeration Drive Instruction Manual
MG16J122 - VLT
®
is a registered Danfoss trademark
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