Ensure that Motor data in parameters 1-20 through
1-25 are set correctly.
If an external fan is in use, check in
that it is selected.
Running AMA in
1-29 Automatic Motor Adaptation
may tune the frequency controller to the
motor more accurately and reduce thermal
loading.
WARNING/ALARM 11, Motor thermistor over temp
The thermistor might be disconnected. Select whether the
frequency converter gives a warning or an alarm in
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) and that the terminal
switch for 53 or 54 is set for voltage. Check
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
selects
terminal 18 or 19.
WARNING/ALARM 12, Torque limit
The torque has exceeded the value in
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, Over current
The inverter peak current limit (approx. 200% of the rated
current) is exceeded. The warning lasts about 1.5 sec., then
the frequency converter 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 frequency
converter.
Check parameters 1-20 through 1-25 for correct
motor data.
ALARM 14, Earth (ground) fault
There is current from the output phases to earth, either in
the cable between the frequency converter and the motor or
in the motor itself.
Troubleshooting
Remove power to the frequency converter and
repair the earth fault.
Check for earth faults in the motor by measuring
the resistance to ground of the motor leads and
the motor with a megohmmeter.
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:
ALARM 16, Short circuit
There is a short circuit in the motor or motor wiring.
Remove power to the frequency converter and repair the
short circuit.
WARNING/ALARM 17, Control word timeout
There is no communication to the frequency converter.
The warning will only be active when
is NOT set to [0]
OFF
.
If
is set to
Stop
and
Trip
, a
warning appears and the frequency converter ramps down
until it stops then displays an alarm.
Troubleshooting
Check connections on the serial communication
cable.
Increase
Check operation of the communication equipment.
Verify proper installation based on EMC
requirements.
Troubleshooting
VLT
®
HVAC Drive Programming Guide
192
MG.11.CB.02 - VLT
®
is a registered Danfoss trademark
4
4
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