Danfoss FC 302 Instruction Manual page 70

FC 300 Instruction Manual
WARNING 1
10 Volts low:
The 10 V voltage from terminal 50 on the
control card is below 10 V.
Remove some of the load from terminal 50,
as the 10 V supply is overloaded. Max. 15
mA or minimum 590 Ω.
WARNING/ALARM 2
Live zero error:
The signal on terminal 53 or 54 is less than
50% of the value set in par. 6-10, 6-12,
6-20, or 6-22 respectively.
WARNING/ALARM 3
No motor:
No motor has been 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
mains voltage imbalance is too high.
This message also appears in case of a fault in the
input rectifier on the adjustable frequency drive.
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 overvoltage limit of the control system. The
adjustable frequency drive is still active.
WARNING 6
DC link voltage low
The intermediate circuit voltage (DC) is below
the undervoltage limit of the control system. The
adjustable frequency drive is still active.
WARNING/ALARM 7
DC over voltage:
If the intermediate circuit voltage exceeds the limit,
the adjustable frequency drive trips after a time.
Possible corrections:
Connect a brake resistor
Extend the ramp time
Activate functions in par. 2-10
Increase par. 14-26
Connect a brake resistor. Extend the ramp time
70
Troubleshooting
WARNING/ALARM 8
DC under voltage:
If the intermediate circuit voltage (DC) drops
below the "voltage warning low" limit (see table
above), the adjustable frequency drive checks
if 24 V backup supply is connected.
If no 24 V backup supply is connected, the
adjustable frequency drive trips after a given
time depending on the unit.
To check whether the supply voltage
matches the adjustable frequency drive, see
General Specifications.
WARNING/ALARM 9
Inverter overloaded:
The adjustable frequency drive 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. You
cannot reset the adjustable frequency drive
until the counter is below 90%.
The fault is that the adjustable frequency drive is
overloaded by more than 100% for too long.
WARNING/ALARM 10
Motor ETR over temperature:
According to the electronic thermal protection
(ETR), the motor is too hot. You can choose if
you want the adjustable frequency drive to give
a warning or an alarm when the counter reaches
100% in par. 1-90. The fault is that the motor is
MG.33.A4.22 - VLT is a registered Danfoss trademark
Alarm/warning limits:
FC 300 Series 3 x 200 -
240 V
[VDC]
Undervoltage 185
Voltage 205
warning low
Voltage 390/405
warning high
(w/o brake -
w/brake)
Overvoltage 410
The voltages stated are the intermediate circuit
voltage of the FC 300 with a tolerance of ± 5 %. The
corresponding mains voltage is the intermediate
circuit voltage (DC-link) divided by 1.35
3 x 380 - 3 x 525 -
500 V 600 V
[VDC] [VDC]
373 532
410 585
810/840 943/965
855 975