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 the motor data in
parameters
1–20
to
1–25
are 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
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
1-93 Thermistor Source
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
1-93 Thermistor Source
.
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
.
ALARM 14, Earth (ground) fault
There is current from the output phase to ground, 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 ground fault.
•
Check for ground faults in the motor by
measuring the resistance to ground of the motor
cables 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
Danfoss:
•
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
(for each option slot)
ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
•
Remove the 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 is only active when
8-04 Control Word Timeout
Function
is NOT set to
[0] Off
.
Troubleshooting
Programming Guide
MG11CE02
Danfoss A/S © 03/2015 All rights reserved.
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