That the motor 1-24 Motor Current is set correctly.
Motor data in 1-20 Motor Power [kW] through
1-25 Motor Nominal Speed are set correctly.
The setting in 1-91 Motor External Fan.
Run AMA in 1-29 Automatic Motor Adaptation
(AMA).
WARNING/ALARM 11, Motor thermistor over temp
The thermistor or the thermistor connection is discon-
nected. Select whether the frequency converter gives a
warning or an alarm when the counter reaches 100% in
1-90 Motor Thermal Protection.
Troubleshooting:
Check if motor is over heating.
Check if the motor is mechanically overloaded.
Check that the thermistor is connected correctly
between terminal 53 or 54 (analog voltage input)
and terminal 50 (+10 V supply), or between
terminal 18 or 19 (digital input PNP only) and
terminal 50.
If a KTY sensor is used, check for correct
connection between terminal 54 and 55.
If using a thermal switch or thermistor, check the
programming of 1-93 Thermistor Resource matches
sensor wiring.
If using a KTY sensor, check the programming of
1-95 KTY Sensor Type, 1-96 KTY Thermistor
Resource, and 1-97 KTY Threshold level match
sensor wiring.
WARNING/ALARM 12, Torque limit
The torque is higher than the value in 4-16 Torque Limit
Motor Mode (in motor operation) or the torque is higher
than the value in 4-17 Torque Limit Generator Mode (in
regenerative operation). 14-25 Trip Delay at Torque Limit
can be used to change this from a warning only condition
to a warning followed by an alarm.
WARNING/ALARM 13, Over Current
The inverter peak current limit (approx. 200% of the rated
current) is exceeded. The warning lasts about 1.5 s, then
the frequency converter trips and issues an alarm. If
extended mechanical brake control is selected, trip can be
reset externally.
Troubleshooting:
This fault may be caused by shock loading or fast
acceleration with high inertia loads.
Turn off the frequency converter. Check if the
motor shaft can be turned.
Check that the motor size matches the frequency
converter.
Incorrect motor data in 1-20 Motor Power [kW]
through 1-25 Motor Nominal Speed.
ALARM 14, Earth (ground) fault
There is a discharge from the output phases to earth,
either in the cable between the frequency converter and
the motor or in the motor itself.
Troubleshooting:
Turn off the frequency converter and remove the
earth fault.
Measure the resistance to ground of the motor
leads and the motor with a megohmmeter to
check for earth faults in the motor.
Perform current sensor test.
ALARM 15, Hardware mismatch
A fitted option is not operational with the present control
board hardware or software.
Record the value of the following parameters and contact
your Danfoss supplier:
15-40 FC Type
15-41 Power Section
15-42 Voltage
15-43 Software Version
15-45 Actual Typecode String
15-49 SW ID Control Card
15-50 SW ID Power Card
15-60 Option Mounted
15-61 Option SW Version
ALARM 16, Short circuit
There is short-circuiting in the motor or on the motor
terminals.
Turn off the frequency converter and remove the short-
circuit.
WARNING/ALARM 17, Control word timeout
There is no communication to the frequency converter.
The warning will only be active when 8-04 Control Word
Timeout Function is NOT set to OFF.
If 8-04 Control Word Timeout Function is set to Stop and
Trip, a warning appears and the frequency converter ramps
down until it trips, while giving an alarm.
Troubleshooting:
Check connections on the serial communication
cable.
Increase 8-03 Control Word Timeout Time
Check operation of the communication
equipment.
Verify proper installation based on EMC
requirements.
WARNING 22, Hoist Mech. Brake:
Report value will show what kind it is.
0 = The torque ref. was not reached before timeout.
1 = There was no brake feedback before timeout.
Troubleshooting VLT Automation Low Harmonic Drive Operating Instructions
MG34O202 - VLT
®
is a registered Danfoss trademark 153
9 9
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