FC 300 Instruction Manual
Troubleshooting
WARNING 1
10 Volts low:
The10Vvoltagefromterminal50onthe
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, 6-1 2,
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 im balance is too high.
This message also appears in case of a fault in the
input r e ctifier on the adjustable frequency dri ve.
Check the supp ly voltage and supply currents
to the adjustable frequency drive.
WARNING 5
DC link voltage high:
The interme diate circuit voltage (DC) is higher than
the overvoltage limit of the control system. The
adjustable frequency drive is still active.
WARNING 6
DC link vol tage low
Theintermediatecircuitvoltage(DC)isbelow
the undervoltage lim it of the control system. The
adjustable frequency drive is still active.
WARNING/ALARM 7
DC over voltage:
If the intermediate circuit voltage exceeds the limi
t,
the adjustable frequency drive trips after a tim e.
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
Alarm/warning limits:
FC 300 Series 3 x 200 -
240 V
3x380-
500 V
3 x 525 -
600 V
[VDC] [VDC] [VDC]
Undervoltage 185 373 532
Voltage
warning low
205 410 585
Voltage
warning high
(w/o brake -
w/brake)
390/405 810/840 943/965
Overvoltage 410 855 975
The voltages stated ar e 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
WARNING/ALARM 8
DC under voltage:
If the inte rmediate 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 w hether 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
c
annot reset the adjustable frequency drive
until the counter is below 90%.
The fault is that the adjustable freq uency drive is
overloaded by more than 100% for too long.
WARNING/ALARM 10
Motor ETR over t emperature:
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
70
MG.33.A4.22 - VLT is a registered Danfoss trademark
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