Danfoss VLT FC 302 Operating Instructions Manual page 136

Warnings and Alarms
9.5.1 Fault Messages for Active Filter
WARNING 1, 10 volts low
The control card voltage is below 10 V from terminal 50.
Remove some of the load from terminal 50, as the 10 V
supply is overloaded. Max. 15 mA or minimum 590 Ω.
Fault messages - active filter
WARNING/ALARM 2, Live zero error
The signal on terminal 53 or 54 is less than 50% of the
value set in parameters 6-10, 6-12, 6-20 or 6-22.
WARNING 4, Mains phase loss
A phase is missing on the supply side, or the mains
voltage imbalance is too high.
WARNING 5, DC link voltage high
The intermediate circuit voltage (DC) is higher than the
high-voltage warning limit. The unit is still active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is below the low-
voltage warning limit. The unit is still active.
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the limit, the
unit trips.
9 9
WARNING/ALARM 8, DC under voltage
If the intermediate circuit voltage (DC) drops below the
under voltage limit, the filter checks if a 24 V back-up
supply is connected. If not, the filter trips. Check that the
mains voltage matches the nameplate specification.
WARNING/ALARM 13, Over Current
the unit current limit has been exceeded.
ALARM 14, Earth (ground) fault
The sum current of the IGBT CTs does not equal zero.
Check if the resistance of any phase to ground has a low
value. Check both before and after mains contactor. Ensure
IGBT current transducers, connection cables, and
connectors are ok.
ALARM 15, Incomp. Hardware
A mounted option is incompatible with the present control
card SW/HW.
ALARM 16, Short circuit
There is a short-circuit in the output. Turn off the unit and
correct the error.
WARNING/ALARM 17, Control word timeout
There is no communication to the unit.
The warning is only active when 8-04 Control Word Timeout
Function is not set to off.
Possible correction: Increase 8-03 Control Word Timeout
Time. Change 8-04 Control Word Timeout Function
WARNING 23, Internal fan fault
Internal fans have failed due to defect hardware or fans
not mounted.
WARNING 24, External fan fault
External fans have failed due to defect hardware or fans
not mounted.
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Operating Instructions
ALARM 29, Heat sink temp
The maximum temperature of the heat sink has been
exceeded. The temperature fault is not reset until the
temperature falls below a defined heat sink temperature.
ALARM 33, Inrush fault
Check whether a 24 V external DC supply has been
connected.
WARNING/ALARM 34, Fieldbus communication fault
The fieldbus on the communication option card is not
working.
WARNING/ALARM 35, Option Fault:
Contact Danfoss or supplier.
ALARM 38, Internal fault
Contact Danfoss or supplier.
ALARM 39, Heat sink sensor
No feedback from the heat sink temperature sensor.
WARNING 40, Overload of Digital Output Terminal 27
Check the load connected to terminal 27 or remove short-
circuit connection.
WARNING 41, Overload of Digital Output Terminal 29
Check the load connected to terminal 29 or remove short-
circuit connection.
ALARM 46, Power card supply
The supply on the power card is out of range.
WARNING 47, 24 V supply low
Contact Danfoss or supplier.
WARNING 48, 1.8 V supply low
Contact Danfoss or supplier.
WARNING/ALARM/TRIP 65, Control card over
temperature
Control card over temperature: The cut-out temperature of
the control card is 80 °C.
WARNING 66, Heat sink temperature low
This warning is based on the temperature sensor in the
IGBT module.
Troubleshooting
The heat sink temperature measured as 0 °C could indicate
that the temperature sensor is defective, causing the fan
speed to increase to the maximum. If the sensor wire
between the IGBT and the gate drive card is disconnected,
this warning would result. Also, check the IGBT thermal
sensor.
ALARM 67, Option module configuration has changed
One or more options have either been added or removed
since the last power-down.
ALARM 68, Safe Torque Off activated
Safe Torque Off has been activated. To resume normal
operation, apply 24 V DC to terminal 37, then send a reset
signal (via bus, digital I/O, or by pressing [Reset]. See
5-19 Terminal 37 Safe Stop.
Danfoss A/S © Rev. 2014-07-29 All rights reserved. MG37A202