Danfoss VLT AutomationDrive FC 302 Instruction Manual page 54

Maintenance, Diagnostics an...
A short circuit in a connected potentiometer or incorrect
wiring of the potentiometer can cause this condition.
Troubleshooting
•
Remove the wiring from terminal 50. If the
warning clears, the problem is with the wiring. If
the warning does not clear, replace the control
card.
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
one 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 the connections on all the analog line
7 7
power terminals.
•
Check that the adjustable frequency drive
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 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 in parameter 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 DC link voltage (DC) is higher than the high-voltage
warning limit. The limit depends on the adjustable
frequency drive voltage rating. The unit is still active.
WARNING 6, DC link voltage low
The DC link voltage (DC) is lower than the low-voltage
warning limit. The limit depends on the adjustable
frequency drive voltage rating. The unit is still active.
52
- Control card terminals 53 and 54 for
signals, terminal 55 common.
-
®
VLT General Purpose I/O MCB 101
terminals 11 and 12 for signals, terminal
10 common.
- ®
VLT Analog I/O Option MCB 109
terminals 1, 3, and 5 for signals,
terminals 2, 4, and 6 common.
Danfoss A/S © 06/2015 All rights reserved.
®
VLT AutomationDrive FC 302
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the limit, the
adjustable frequency drive trips after a time.
Troubleshooting
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WARNING/ALARM 8, DC undervoltage
If the DC link voltage drops below the undervoltage 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
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WARNING/ALARM 9, Inverter overload
The adjustable frequency drive 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 98% and trips at 100%, while giving an alarm.
The adjustable frequency drive cannot be reset until the
counter is below 90%.
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 adjustable frequency
drive issues a warning or an alarm when the counter
reaches 100% in parameter 1-90 Motor Thermal Protection.
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 backup (parameter 14-10 Line Failure).
Make sure that the supply voltage matches the
adjustable frequency drive voltage.
Perform an input voltage test.
Perform a soft charge circuit test.
Compare the output current shown on the LCP
with the adjustable frequency drive rated current.
Compare the output current shown on the LCP
with the 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.
MG34U422