Turn off the adjustable frequency drive and remove the brake resistor.
This alarm/warning could also occur if the brake resistor overheats. Ter-
minal 104 to 106 are available as brake resistor. Klixon inputs, see section
Brake Resistor Temperature Switch.
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 connected/working.
ALARM 29, Heatsink temp:
The maximum temperature of the heatsink has been exceeded. The tem-
perature fault will not be reset until the temperature falls below a defined
heatsink temperature. The trip and reset point are different based on the
drive power size.
The fault could be a result of:
-
Ambient temperature too high
-
Motor cable too long
ALARM 30, Motor phase U missing:
Motor phase U between the adjustable frequency drive and the motor is
missing.
Turn off the adjustable frequency drive and check motor phase U.
ALARM 31, Motor phase V missing:
Motor phase V between the adjustable frequency drive and the motor is
missing.
Turn off the adjustable frequency drive and check motor phase V.
ALARM 32, Motor phase W missing:
Motor phase W between the adjustable frequency drive and the motor is
missing.
Turn off the adjustable frequency drive and check motor phase W.
ALARM 33, Soft-charge fault:
Too many power-ups have occured within a short time period. See the
chapter
General Specifications
for the allowed number of power-ups
within one minute.
WARNING/ALARM 34, Serial communication bus fault:
The serial communication bus on the communication option card is not
working.
WARNING/ALARM 36, Line failure:
This warning/alarm is only active if the supply voltage to the adjustable
frequency drive is lost and parameter 14-10 is NOT set to OFF. Possible
correction: check the fuses to the adjustable frequency drive
ALARM 38, Internal fault:
When this alarm sounds, 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 EEPROM data is defective or too old.
512 The control board EEPROM data is defective or too old.
513 Communication timeout Reading EEPROM data
514 Communication timeout Reading EEPROM data
515 The Application Orientated Control cannot recognize the
EEPROM data.
516 Cannot write to the EEPROM because a write command
is on progress
517 The write command has timed out.
518 Failure in the EEPROM
519 Missing or invalid barcode data in EEPROM 1024 – 1279
CAN message cannot be sent. (1027 indicates a possible
hardware failure)
1281 Digital Signal Processor flash timeout
1282 Power micro software version mismatch
1283 Power EEPROM data version mismatch
1284 Cannot read Digital Signal Processor software version
1299 Option SW in slot A is too old.
1300 Option SW in slot B is too old.
1301 Option SW in slot C0 is too old.
1302 Option SW in slot C1 is too old.
1315 Option SW in slot A is not supported (not allowed).
1316 Option SW in slot B is not supported (not allowed).
1317 Option SW in slot C0 is not supported (not allowed).
1318 Option SW in slot C1 is not supported (not allowed).
6 Warnings and Alarms
VLT
®
Automation Drive FC 300
Instruction Manual High Power
6-6
MG.33.U2.22 - VLT
®
is a registered Danfoss trademark
6
