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 Adjustable frequency drive
programming and switch settings match the
analog signal type.
Perform Input Terminal Signal Test.
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
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 24V DC backup supply is connected. If no 24V
DC backup supply is connected, the Adjustable frequency
drive trips after a fixed time delay. The time delay varies
with unit size.
Troubleshooting:
Check that the supply voltage matches the
Adjustable frequency drive voltage.
Perform input voltage test
Perform soft charge circuit test
WARNING/ALARM 13, Overcurrent
The inverter peak current limit (approximately 200% of the
rated current) is exceeded. The warning lasts about 1.5
secs., then the Adjustable frequency drive trips and issues
an alarm. This fault may be caused by shock loading or
fast acceleration with high inertia loads. If extended
mechanical brake control is selected, trip can be reset
externally.
Troubleshooting:
Remove power and check if the motor shaft can
be turned.
Check that the motor size matches the Adjustable
frequency drive.
Check parameters 1-20 through 1-25 for correct
motor data.
ALARM 14, Ground fault
There is current from the output phases to ground, either
in the cable between the Adjustable frequency drive and
the motor or in the motor itself.
Troubleshooting:
Remove power to the Adjustable frequency drive
and repair the ground fault.
Check for ground faults in the motor by
measuring the resistance to ground of the motor
leads and the motor with a megohmmeter.
ALARM 15, Hardware mismatch
A fitted option is not operational with the present control
board hardware or software.
Troubleshooting
VLT Active Filter AAF 00x
9-4
MG.90.V2.22 - VLT
®
is a registered Danfoss trademark
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