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
Fan Moni-
tor
, par. 14-53, (set to [0] Disabled).
WARNING 24, External 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
Fan Moni-
tor
, par. 14-53, (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 fre-
quency 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 calculated 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 intermediate 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 frequency converter 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 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.
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, Drive over temperature:
If the enclosure is IP 20 or IP 21/Type 1, the cut-out temperature of the
heat-sink is 95
o
C +5
o
C. The temperature fault cannot be reset, until the
temperature of the heatsink is below 70
o
C +5
o
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 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 miss-
ing.
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 Specifications
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.
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 cor-
rection: check the fuses to the frequency converter
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 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
EEPROM data
516 Cannot write write to the EEPROM because a write com-
mand is on progress
517 The write command is under time out
518 Failure in the EEPROM
519 Missing or invalid BarCode data in EEPROM 1024 – 1279
CAN telegram cannot be sent. (1027 indicate a possible
hardware failure)
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
1311 Option SW in slot C0 is too old
1312 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)
1536 An exception in the Application Orientated Control is
registered. Debug information written in LCP
1792 DSP watchdog is active. Debugging of power part data
Motor Orientated Control data not transferred correctly
2049 Power data restarted
2315 Missing SW version from power unit
2816 Stack overflow Control board module
2817 Scheduler slow tasks
2818 Fast tasks
2819 Parameter thread
2820 LCP stack overflow
2821 Serial port overflow
FC 300 Programming Guide
3. Troubleshooting
MG.33.M3.02 - VLT
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is a registered Danfoss trademark
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