Troubleshooting - Danfoss VLT DriveMotor FCP 106 Programming Manual

Diagnostics and Troubleshoo...

5.5 Troubleshooting

WARNING/ALARM 2, Live zero error
This warning or alarm only appears if programmed in
parameter 6-01 Live Zero Timeout Function. The signal on 1
of the analog inputs is less than 50% of the minimum
value programmed for that input. Broken wiring or a faulty
device sending the signal can cause this condition.
Troubleshooting
•
Check connections on all analog mains terminals.
- Control card terminals 53 and 54 for
signals, terminal 55 common.
•
Check that the frequency converter programming
and switch settings match the analog signal type.
•
Perform an input terminal signal test.
WARNING/ALARM 3, No motor
No motor is connected to the output of the frequency
converter.
WARNING/ALARM 4, Mains phase loss
A phase is missing on the supply side, or the mains
voltage imbalance is too high. This message also appears
for a fault in the input rectifier. Options are programmed in
parameter 14-12 Function at Mains Imbalance.
Troubleshooting
•
Check the supply voltage and supply currents to
the frequency converter.
WARNING/ALARM 7, DC overvoltage
If the DC-link voltage exceeds the limit, the frequency
converter trips after a certain time.
Troubleshooting
•
Connect a brake resistor.
•
Extend the ramp time.
•
Change the ramp type.
•
Activate the functions in parameter 2-10 Brake
Function.
•
Increase parameter 14-26 Trip Delay at Inverter
Fault.
•
If the alarm/warning occurs during a power sag,
use kinetic back-up (parameter 14-10 Mains
Failure).
WARNING/ALARM 8, DC under voltage
If the DC-link voltage drops below the undervoltage limit,
the frequency converter trips after a fixed time delay. The
time delay varies with unit size.
Troubleshooting
•
Check that the supply voltage matches the
frequency converter voltage.
•
Perform an input voltage test.
•
Perform a soft charge circuit test.
MG03N202
Programming Guide
WARNING/ALARM 9, Inverter overload
The frequency converter has run with more than 100%
overload for too long and is about to cut out. The counter
for electronic thermal inverter protection issues a warning
at 90% and trips at 100% with an alarm. The frequency
converter can be reset only when the counter is 0.
Troubleshooting
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WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the frequency converter
issues a warning or an alarm when the counter is >90% if
parameter 1-90 Motor Thermal Protection is set to warning
options, or whether the frequency converter trips when
the counter reaches 100% if parameter 1-90 Motor Thermal
Protection is set to trip options. The fault occurs when the
motor runs with more than 100% overload for too long.
Troubleshooting
•
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WARNING/ALARM 11, Motor thermistor over temp
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
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Danfoss A/S © 11/2015 All rights reserved.
Compare the output current shown on the LCP
with the frequency converter rated current.
Compare the output current shown on the LCP
with the measured motor current.
Show the thermal frequency converter load on
the LCP and monitor the value. When running
above the frequency converter continuous
current rating, the counter increases. When
running below the frequency converter
continuous current rating, the counter decreases.
Check for motor overheating.
Check if the motor is mechanically overloaded.
Check that the motor current set in
parameter 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
Adaptation (AMA) tunes the frequency converter
to the motor more accurately and reduces
thermal loading.
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.
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