Danfoss VLT AutomationDrive FC 300 User Manual

9.1.2 Warnings/Alarm Messages -
Frequency Converters
WARNING 1, 10 volts low
The control card voltage is below 10 V from terminal 50.
Remove some of the load from terminal 50, as the 10 V
supply is overloaded. Max. 15 mA or minimum 590 Ω.
This condition can be caused by a short in a connected
potentiometer or improper wiring of the potentiometer.
Troubleshooting: Remove the wiring from terminal 50. If
the warning clears, the problem is with the customer
wiring. If the warning does not clear, replace the control
card.
WARNING/ALARM 2, Live zero error
This warning or alarm will only appear if programmed by
the user in 6-01 Live Zero Timeout Function. The signal on
one of the analog inputs is less than 50% of the minimum
value programmed for that input. This condition can be
caused by broken wiring or faulty device sending the
signal.
Troubleshooting:
Check connections on all the analog input
terminals. Control card terminals 53 and 54 for
signals, terminal 55 common. MCB 101 terminals
11 and 12 for signals, terminal 10 common. MCB
109 terminals 1, 3, 5 for signals, terminals 2, 4, 6
common).
Check that the 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
frequency converter. This warning or alarm will only
appear if programmed by the user in 1-80 Function at Stop.
Troubleshooting: Check the connection between the drive
and the motor.
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 on the frequency converter.
Options are programmed at 14-12 Function at Mains
Imbalance.
Troubleshooting: Check the supply voltage and supply
currents to the frequency converter
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
drive voltage rating. The frequency converter 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 drive
voltage rating. The frequency converter is still active.
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the limit, the
frequency converter trips after a time.
Troubleshooting:
Connect a brake resistor
Extend the ramp time
Change the ramp type
Activate functions in 2-10 Brake Function
Increase 14-26 Trip Delay at Inverter Fault
WARNING/ALARM 8, DC under voltage
If the intermediate circuit voltage (DC) drops below the
under voltage limit, the frequency converter checks if a 24
V backup supply is connected. If no 24 V backup supply is
connected, 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 Input voltage test
Perform soft charge and rectifier circuit test
WARNING/ALARM 9, Inverter overloaded
The frequency converter is about to cut out because of an
overload (too high current for too long). The counter for
electronic, thermal inverter protection gives a warning at
98% and trips at 100%, while giving an alarm. The
frequency converter cannot be reset until the counter is
below 90%.
The fault is that the frequency converter is overloaded by
more than 100% for too long.
Troubleshooting:
Compare the output current shown on the LCP
keypad with the drive rated current.
Compare the output current shown on the LCP
keypad with measured motor current.
Display the Thermal Drive Load on the keypad
and monitor the value. When running above the
drive continuous current rating, the counter
should increase. When running below the drive
continuous current rating, the counter should
decrease.
Note: See the derating section in the Design Guide for
more details if a high switching frequency is required.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the frequency converter
gives a warning or an alarm when the counter reaches
100% in 1-90 Motor Thermal Protection. The fault is that the
motor is overloaded by more than 100% for too long.
Troubleshooting:
Check if motor is over heating.
If the motor is mechanically overloaded
Troubleshooting VLT Automation Low Harmonic Drive Operating Instructions
152 MG34O202 - VLT
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Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English