Danfoss vlt fcd 302 Operating Instructions Manual page 71

Troubleshooting
W W ARNING/ALARM 22, Hoist Mechanical Brake:
Report value will show what kind it is. 0 = The torque ref. was
not reached before timeout. 1 = There was no brake
feedback before timeout.
WARNING 23, Internal fan fault:
The fan warning function is an extra protection function that
checks if the fan is running / mounted. The fan warning can
be disabled in 14-53 Fan Monitor (set to [0] Disabled).
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 2-15 Brake Check).
WARNING/ALARM 26, Brake resistor power limit:
The power transmitted to the brake resistor is calculated as a
percentage, as a mean value over the last 120sec., on the
7 7
basis of the resistance value of the brake resistor (2-11 Brake
Resistor (ohm)) 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 2-13 Brake
Power Monitoring, the frequency 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 operation and if it
short-circuits, the brake function 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.
This alarm/ warning could also occur should the brake
resistor overheat. Terminal 104 to 106 are available as brake
resistor. Klixon inputs, see section Brake Resistor
Temperature Switch.
CAUTION
There is a risk of substantial power being transmitted to the
brake resistor if the brake transistor is short-circuited.
WARNING/ALARM 28, Brake check failed:
Brake resistor fault: the brake resistor is not connected/
working.
ALARM 29, Drive over temperature:
The cut-out temperature of the heat-sink is 95 C +5 C. The
temperature fault cannot be reset, until the temperature of
the heatsink is below 70 C +5 C.
The fault could be:
- Ambient temperature too high
- Too long motor cable
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VLT Decentral Drive FCD 302 Operating Instructions
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 power ups have occured within a short time
period. See section 8.2 General Specifications for the allowed
number of power ups within one minute.
WARNING/ALARM 34, Fieldbus communication fault:
The fieldbus on the communication option card is not
working correctly. Please check parameters associated with
the module and check the wiring for fieldbus.
WARNING/ALARM 36, Mains failure:
This warning/alarm is only active if the supply voltage to the
frequency converter is lost and 14-10 Mains Failure is NOT set
to OFF. Possible correction: check the fuses to the frequency
converter
ALARM 37, Phase imbalance:
There is a current imbalance between the power units
ALARM 38, Internal fault:
By this alarm it may be necessary to contact your Danfoss
supplier. Some typical alarm messages:
256 The power EEPROM data is defect or too old
512 The control board EEPROM data is defect or too old
513 Communication time out Reading EEPROM data
514 Communication time out Reading EEPROM data
515 The Application Orientated Control cannot recognize the
516 Cannot write to the EEPROM because a write command is
517 The write command is under time out
518 Failure in the EEPROM
519 Missing or invalid BarCode data in EEPROM 1024 – 1279
1281 Digital Signal Processor flash time-out
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
1315 Option SW in slot A is not supported (not allowed)
MG.04.F2.02 - VLT is a registered Danfoss trademark
0 The serial port cannot be initialized. Serious hardware
failure
EEPROM data
on progress
CAN telegram cannot be sent. (1027 indicate a possible
hardware failure)