Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 116

Troubleshooting
•
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 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
The thermistor may be disconnected. Select whether the
frequency converter issues 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). Also check
that the terminal switch for 53 or 54 is set for
8 8
voltage. Check that 1-93 Thermistor Source is set
to 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 a KTY sensor is used, check for correct
connection between terminals 54 and 55
•
If using a thermal switch or thermistor, check that
the programming of 1-93 Thermistor Source
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 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
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.
114
Operating Instructions
WARNING/ALARM 13, Over current
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts approxi-
mately 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
ALARM 14, Earth (ground) fault
There is current from the output phases to ground, either
in the cable between the frequency converter and the
motor, or in the motor itself.
Troubleshooting
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:
ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
WARNING/ALARM 17, Control word timeout
There is no communication with the frequency converter.
Danfoss A/S © Rev. 06/2014 All rights reserved.
•
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.
•
Remove the power to the frequency converter
and repair the ground fault.
•
Check for ground faults in the motor by
measuring the resistance to the ground of the
motor cables and the motor with a
megohmmeter.
•
Perform a current sensor test.
•
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)
•
Remove the power to the frequency converter
and repair the short-circuit.
MG20Y202