Danfoss FC 300 Design Manual page 297

FC 300 Design Guide
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 ap-
pears and the frequency converter ramps down to
zero speed, while giving an alarm.
Par. 8-03 Control Word Timeout Time could pos-
sibly be increased.
WARNING 25
Brake resistor short-circuited:
The brake resistor is monitored during operation.
If it short-circuits, the brake function is discon-
nected and the warning appears. The frequency
converter still works, but without the brake func-
tion. 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 cal-
culated 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 intermedi-
ate 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 fre-
quency converter cuts out and issues this alarm,
when the dissipated braking power is higher than
100%.
WARNING/ALARM 27
Brake chopper fault:
The brake transistor is monitored during opera-
tion and if it short-circuits, the brake function dis-
connects and the warning comes up. The frequen-
cy 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 in-
active.
Turn off the frequency converter and remove the
brake resistor.
Warning: There is a risk of substantial
power being transmitted to the brake
resistor if the brake transistor is short-
circuited.
ALARM/WARNING 28
Brake check failed:
Brake resistor fault: the brake resistor is not con-
nected/working.
WARNING/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
Troubleshooting
The temperature fault cannot be reset, until the
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 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 Specifica-
tions for the allowed number of powerups within
one minute.
WARNING/ALARM 34
Fieldbus communication fault:
The fieldbus on the communication option card
is not working.
ALARM 38
Internal fault:
By this alarm it may be necessary to contact your
Danfoss supplier. Some typical alarm messages:
0 - The serial port cannot be initialized. Serious
hardware failure
256 - The power E2PROM data is defect or too old
512 - The control board E2PROM data is defect or
too old
513 - Communication time out Reading E2PROM
data
514 - Communication time out Reading E2PROM
data
515 - The Application Orientated Control cannot
recognize the E^2 Prom data
o o
C +5 C.
MG.33.B7.02 - VLT is a registered Danfoss trademark
- Ambient temperature too high
- Too long motor cable
o
C.
297