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109 terminals 1, 3, 5 for signals, terminals 2, 4, 6
common).
Check that the adjustable frequency drive
programming and switch settings match the
analog signal type.
Perform Input Terminal Signal Test.
WARNING/ALARM 3, No motor
No motor has been connected to the output of the
adjustable frequency drive.
WARNING/ALARM 4, Mains phase loss
A phase is missing on the supply side, or the line voltage
imbalance is too high. This message also appears for a
fault in the input rectifier on the adjustable frequency
drive. Options are programmed at
14-12 Function at Mains
Imbalance
.
Troubleshooting
Check the supply voltage and supply currents to the
adjustable frequency drive.
WARNING 5, DC link voltage high
The intermediate circuit voltage (DC) is higher than the
high voltage warning limit. The limit is dependent on the
adjustable frequency drive voltage rating. The unit is still
active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is lower than the low
voltage warning limit. The limit is dependent on the
adjustable frequency drive voltage rating. The unit is still
active.
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the limit, the
adjustable frequency drive trips after a time.
Troubleshooting
Connect a brake resistor
Extend the ramp time
Change the ramp type
Activate the functions in
2-10 Brake Function
Increase
14-26 Trip Delay at Inverter Fault
If the alarm/warning occurs during a power sag,
the solution is to use kinetic backup (
14-10 Line
Failure
)
WARNING/ALARM 8, DC undervoltage
If the intermediate circuit voltage (DC link) drops below
the under voltage limit, the adjustable frequency drive
checks if a 24 V DC backup supply is connected. If no 24 V
DC backup supply is connected, the adjustable frequency
drive trips after a fixed time delay. The time delay varies
with unit size.
Troubleshooting
Make sure that the supply voltage matches the
adjustable frequency drive voltage.
Perform input voltage test.
Perform soft charge circuit test.
WARNING/ALARM 9, Inverter overload
The adjustable frequency drive is about to cut out because
of an overload (current too high for too long). The counter
for electronic, thermal inverter protection issues a warning
at 98% and trips at 100%, while giving an alarm. The
adjustable frequency drive
cannot
be reset until the
counter is below 90%.
The fault is that the adjustable frequency drive has run
with more than 100% overload for too long.
Troubleshooting
Compare the output current shown on the LCP
with the adjustable frequency drive rated current.
Compare the output current shown on the LCP
with measured motor current.
Display the Thermal Drive Load on the LCP and
monitor the value. When running above the
adjustable frequency drive continuous current
rating, the counter increases. When running
below the adjustable frequency drive continuous
current rating, the counter decreases.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the adjustable frequency
drive issues a warning or an alarm when the counter
reaches 100% in
1-90 Motor Thermal Protection
. The fault
occurs when the motor runs with more than 100%
overload 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
through 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
.
Warnings and Alarms
VLT
®
Automation Drive D-Frame
Instruction Manual
MG34U222 - VLT
®
is a registered Danfoss trademark
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