List Of Warnings And Alarms - Danfoss VLT AutomationDrive FC 301 Operating Instructions Manual

Diagnostics and Troubleshoo...
OK
On
Warn.
Alarm
Hand
Off
on
Illustration 7.3 Status Indicator Lights
Warning LED
Warning On
Alarm Off
Trip-Lock On
Table 7.5 Status Indicator Lights Explanations

7.4 List of Warnings and Alarms

The warning/alarm information below defines each
warning/alarm condition, provides the probable cause for
the condition, and details a remedy or troubleshooting
procedure.
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.
A short circuit in a connected potentiometer or improper
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
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 faulty device
sending the signal can cause this condition.
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
®
VLT AutomationDrive FC 301/302 Operating Instructions
Auto
Reset
on
Alarm LED
Off
On (Flashing)
On (Flashing)
MG33AN02 - Rev. 2013-09-06
109 terminals 1, 3, 5 for signals, terminals 2, 4, 6
common).
Check that the frequency converter 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.
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
frequency converter 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
frequency converter voltage rating. The unit 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 the functions in 2-10 Brake Function
Increase 14-26 Trip Delay at Inverter Fault
If the alarm/warning occurs during a power sag,
use kinetic back-up (14-10 Mains Failure)
WARNING/ALARM 8, DC under voltage
If the intermediate circuit voltage (DC link) drops below
the under voltage limit, the frequency converter checks if a
24 V DC back-up supply is connected. If no 24 V DC back-
up 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 circuit test.
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