Danfoss FC 300 Operating Instructions Manual page 73

FC 300 Operating Instructions
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
In-complete 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 fre-
quency converter.
The warning will only be active when par.
8-04 is NOT set to OFF.
If par. 8-04 is set to Stop and Trip, a warning
appears and the frequency converter ramps down
until it trips, while giving an alarm.
par. 8-03 Control word Timeout Time could
possibly be increased.
WARNING 25
Brake resistor short-circuited:
The brake resistor is monitored during operation. If
it short-circuits, the brake function is disconnected
and the warning appears. The frequency converter
still works, but without the brake function. Turn
off the frequency converter and replace the brake
resistor (see par. 2-15 Brake Check.
ALARM/WARNING 26
Brake resistor power limit:
The power transmitted to the brake resistor is
calculated as a percentage, as a mean value over
the last 120 s, on the basis of the resistance value of
the brake resistor (par. 2-11) and the intermediate
circuit voltage. The warning is active when the
dissipated braking power is higher than 90%. If Trip
[2] has been selected in par. 2-13, the frequency
converter cuts out and issues this alarm, when the
dissipated braking power is higher than 100%.
WARNING 27
Brake chopper fault:
The brake transistor is monitored during operation
and if it short-circuits, the brake function disconnects
Troubleshooting
and the warning comes up. The frequency converter
is still able to run, but since the brake transistor has
short-circuited, substantial power is transmitted
to the brake resistor, even if it is inactive.
Turn off the frequency converter and remove
the brake resistor.
is short-circuited.
ALARM/WARNING 28
Brake check failed:
Brake resistor fault: the brake resistor is
not connected/working.
ALARM 29
Drive over temperature:
If the enclosure is IP 20 or IP 21/TYPE 1, the
cut-out temperature of the heat-sink is 95
o
temperature of the heatsink is below 70
The fault could be:
-
-
ALARM 30
Motor phase U missing:
Motor phase U between the frequency converter
and the the motor is missing.
Turn off the frequency converter and check
motor phase U.
ALARM 31
Motor phase V missing:
Motor phase V between the frequency converter
and the motor is missing.
Turn off the frequency converter and check
motor phase V.
ALARM 32
Motor phase W missing:
Motor phase W between the frequency converter
and the motor is missing.
Turn off the frequency converter and check
motor phase W.
ALARM 33
Inrush fault:
Too many powerups have occured within a short time
period. See the chapter General Specifications for
the allowed number of powerups within one minute.
MG.33.A5.02 - VLT is a registered Danfoss trademark
Warning: There is a risk of substantial
power being transmitted to the brake
resistor if the brake transistor
C. The temperature fault cannot be reset, until the
Ambient temperature too high
Too long motor cable
o
C +5
o C +5 o C.
73