8.1.1 Fault messages
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 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. This
condition can be caused by broken wiring or faulty device
sending the signal.
WARNING/ALARM 3, No motor
No motor has been connected to the output of the
adjustable frequency drive. This warning or alarm will only
appear if programmed by the user in parameter
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 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 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 intermediate circuit voltage (DC) is higher than the
high voltage warning limit. The limit is dependent on the
drive voltage rating. The adjustable frequency drive 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 adjustable frequency drive 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 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
undervoltage limit, the adjustable frequency drive checks if
a 24 V backup supply is connected. If no 24 V backup
supply is connected, the adjustable frequency drive trips
after a fixed time delay. The time delay varies with unit
size.
WARNING/ALARM 9, Inverter overloaded
The adjustable frequency drive is about to cut out because
of an overload (current too high for too long). The counter
for electronic, thermal inverter protection gives 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%.
The fault is that the adjustable frequency drive is
overloaded by more than 100% for too long. 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, the motor
is too hot. Select whether the adjustable frequency drive
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 the motor is overheating.
If the motor is mechanically overloaded
That the motor
1-24 Motor Current
is set correctly.
Motor data in parameters 1-20 through 1-25 are
set correctly.
The setting in parameter 1-91, Motor External
Fan.
Run AMA in parameter 1-29.
WARNING/ALARM 11, Motor thermistor over temp
The thermistor or the thermistor connection is discon-
nected. Select whether the adjustable frequency drive
gives a warning or an alarm when the counter reaches
100% in
1-90 Motor Thermal Protection
.
Troubleshooting:
Check if the motor is overheating.
Check if the motor is mechanically overloaded.
Check that the thermistor is connected correctly
between terminal 53 or 54 (analog voltage input)
and terminal 50 (+10 V supply), or between
Troubleshooting
VLT AQUA 12-Pulse High Power Instruction Manual
8-4
MG.20.Y1.22 - VLT
®
is a registered Danfoss trademark
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