Danfoss FC 300 Programming Manual page 196

3. Troubleshooting
The alarm words, warning words and extended status words can be read out via serial bus or optional fieldbus for diagnose. See also par. 16-90 - 16-94.
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 over-
loaded. 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.
3
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 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 in case of a fault in the input rectifier on the
frequency converter.
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 overvoltage limit
of the control system. The frequency converter is still active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is below the undervoltage limit of
the control system. The frequency converter is still active.
WARNING/ALARM 7, DC over voltage:
If the intermediate circuit voltage exceeds the limit, the frequency con-
verter trips after a time.
Possible corrections:
Connect a brake resistor
Extend the ramp time
Activate functions in par. 2-10
Increase par. 14-26
Alarm/warning limits:
Undervoltage
Voltage warning
low
Voltage warning
high (w/o brake -
w/brake)
Overvoltage
The voltages stated are the intermediate circuit voltage of
the frequency converter 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 intermediate circuit voltage (DC) drops below the "voltage warning
low" limit (see table above), the frequency converter checks if 24 V back-
up supply is connected.
If no 24 V backup supply is connected, the frequency converter trips after
a given time depending on the unit.
To check whether the supply voltage matches the frequency converter,
see General Specifications
196
3 x 200 - 3 x 380 - 3 x 525 - 600
240 V 500 V
[VDC] [VDC] [VDC]
185 373 532
205 410 585
390/405 810/840 943/965
410 855 975
.
MG.33.M3.02 - VLT
WARNING/ALARM 9, Inverter overloaded:
The frequency converter 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 frequency converter until the counter is be-
low 90%.
The fault is that the frequency converter 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 frequency converter to give a warning or
an alarm when the counter reaches 100% in par. 1-90. The fault is that
the motor is overloaded by more than 100% for too long. Check that the
motor par. 1-24 is set correctly.
WARNING/ALARM 11, Motor thermistor over temp:
The thermistor or the thermistor connection is disconnected. You can
choose if you want the frequency converter to give a warning or an alarm
when the counter reaches 100% in par. 1-90. Check that the thermistor
is connected correctly between terminal 53 or 54 (analog voltage input)
and terminal 50 (+ 10 V supply), or between terminal 18 or 19 (digital
input PNP only) and terminal 50. If aKTY sensoris used, check for correct
connection between terminal 54 and 55.
WARNING/ALARM 12, Torque limit:
The torque is higher than the value in par. 4-16 (in motor operation) or
the torque is higher than the value in par. 4-17 (in regenerative opera-
tion).
WARNING/ALARM 13, Over Current:
The inverter peak current limit (approx. 200% of the rated current) is
exceeded. The warning will last approx. 8-12 sec., then the frequency
converter trips and issues an alarm. Turn off the frequency converter and
check if the motor shaft can be turned and if the motor size matches the
frequency converter.
If extended mechanical brake control is selected, trip can be reset exter-
nally.
V
ALARM 14, Earth fault:
There is a discharge from the output phases to earth, either in the cable
between the frequency converter and the motor or in the motor itself.
Turn off the frequency converter and remove the earth fault.
ALARM 15, Incomplete hardware:
A fitted option is not handled by the present control board (hardware or
software).
ALARM 16, Short-circuit
There is short-circuiting in the motor or on the motor terminals.
Turn off the frequency converter and remove the short-circuit.
WARNING/ALARM 17, Control word timeout:
There is no communication to the frequency converter.
The warning will only be active when par. 8-04 is NOT set to
If par. 8-04 is set to
converter ramps down until it trips, while giving an alarm.
Control word Timeout Time
par. 8-03
®
is a registered Danfoss trademark
FC 300 Programming Guide
Stop and Trip , a warning appears and the frequency
could possibly be increased.
OFF .