Danfoss VLT Automation Drive FC 300 Operating Instructions Manual page 128

6. Warnings and Alarms
WARNING/ALARM 17, Control word
time-out:
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
appears and the frequency converter ramps
down until it trips, while giving an alarm.
par. 8-03
possibly be increased.
WARNING 23, Internal fan fault:
The fan warning function is an extra protec-
tion function that checks if the fan is running /
mounted. The fan warning can be disabled in
Fan Monitor
6
WARNING 24, External fan fault:
The fan warning function is an extra protec-
tion function that checks if the fan is running /
mounted. The fan warning can be disabled in
Fan Monitor
WARNING 25, Brake resistor short-
circuited:
The brake resistor is monitored during opera-
tion. 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
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 resist-
ance 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
been selected in par. 2-13, the frequency con-
verter cuts out and issues this alarm, when the
dissipated braking power is higher than
100%.
ALARM/ WARNING 27, Brake chopper
fault:
The brake transistor is monitored during op-
eration and if it short-circuits, the brake func-
tion disconnects 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.
128
OFF .
Stop and Trip , a warning
Control word Time-out Time
, par. 14-53, (set to [0] Disabled).
, par. 14-53, (set to [0] Disabled).
Brake Check
).
Trip
[2] has
MG.33.U1.02 - VLT
This alarm/ warning could also occur should
the brake resistor overheat. Terminal 104 to
106 are available as brake resistor. Klixon in-
puts, see section Brake Resistor Temperature
Switch.
Warning: There is a risk of sub-
stantial power being transmit-
ted to the brake resistor if the
brake transistor is short-circuit-
could
ed.
ALARM/WARNING
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
cutout temperature of the heatsink is 95
+5 o C. The temperature fault cannot be reset,
until the temperature of the heatsink is below
o o
70 C +5 C.
The fault could be:
- Ambient temperature too high
- Too long motor cable
ALARM 30, Motor phase U missing:
Motor phase U between the frequency con-
verter 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 con-
verter 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 con-
verter and the motor is missing.
Turn off the frequency converter and check
motor phase W.
ALARM 33, Inrush fault:
Too many power-ups have occured within a
short time period. See the chapter
Specifications
for the allowed number of pow-
er-ups within one minute.
WARNING/ALARM 34, Fieldbus commu-
nication fault:
The fieldbus on the communication option
card is not working.
WARNING/ALARM 36, Mains failure:
This warning/alarm is only active if the supply
voltage to the frequency converter is lost and
parameter 14-10 is NOT set to OFF. Possible
® is a registered Danfoss trademark
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VLT Automation Drive FC 300
Operating Instructions High Power
28, Brake check
o C
General