WARNING 25
Brake resistor fault
(BRAKE RESISTOR FAULT):
The brake resistor is monitored during operation and
if it short-circuits, the brake function is disconnected
and the warning comes up. The frequency converter
will still be able to work, although without the brake
function. Turn off the frequency converter and replace
the brake resistor.
ALARM/WARNING 26
Brake resistor power 100%
(BRAKE PWR WARN 100%):
The power transmitted to the brake resistor is calcula-
ted as a percentage, as a mean value over the last 120
sec., on the basis of the resistance value of the brake
resistor (parameter 401) and the intermediate circuit
voltage. The warning is active when the dissipated
braking power is higher than 100%. If Trip [2] has been
selected in parameter 403, the frequency converter
will cut out while giving this alarm.
WARNING 27
Brake transistor fault
(BRAKE IGBT FAULT):
The brake transistor is monitored during operation and
if it short-circuits, the brake function is disconnected
and the warning comes up. The frequency converter
will still be able to run, but since the brake transistor
has short-circuited, substantial power will be transmit-
ted to the brake resistor, even if it is inactive.
Turn off the frequency converter and remove the brake
resistor.
Warning: There is a risk of substantial
power being transmitted to the brake re-
sis- tor if the brake transistor has short-
circuited.
ALARM: 29
Heat sink temperature too high
(HEAT SINK OVER TEMP.):
If the enclosure is IP 00 or IP 20/NEMA 1, the cut-out
temperature of the heat-sink is 90°C. If IP 54 is used,
the cut-out temperature is 80°C.
The tolerance is ± 5°C. The temperature fault cannot
be reset, until the temperature of the heat-sink is below
60°C.
The fault could be the following:
- Ambient temperature too high
- Too long motor cable
- Too high switching frequency.
ALARM: 30
Motor phase U missing
(MISSING MOT.PHASE U):
Motor phase U between frequency converter and mo-
tor is missing.
Turn off the frequency converter and check motor
phase U.
ALARM: 31
Motor phase V missing
(MISSING MOT.PHASE V):
Motor phase V between frequency converter and mo-
tor is missing.
Turn off the frequency converter and check motor
phase V.
ALARM: 32
Motor phase W missing
(MISSING MOT.PHASE W):
Motor phase W between frequency converter and mo-
tor is missing.
Turn off the frequency converter and check motor
phase W.
ALARM: 33
Quick discharge not OK
(QUICK DISCHARGE NOT OK):
Check whether a 24 Volt external DC supply has been
connected and that an external brake/discharge resis-
tor has been fitted.
WARNING/ALARM: 34
Fieldbus communication fault
(FIELDBUS COMMUNICATION FAULT):
The fieldbus on the communication option card is not
working.
WARNING: 35
Out of frequency range
(OUT OF FREQUENCY RANGE):
This warning is active if the output frequency has
reached its Output frequency low limit (parameter 201)
or Output frequency high limit (parameter 202). If the
frequency converter is in Process control, closed loop
(parameter 100), the warning will be active in the dis-
play. If the frequency converter is in another mode than
Process control, closed loop, bit 008000 Out of fre-
quency range in extended status word will be active,
while there will be no warning in the display.
VLT
®
5000 Series
164 MG.51.C5.22 - VLT
p
is a registered Danfoss trademark.
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