Danfoss VLT Refrigeration Drive FC 103 Operating Instructions Manual page 82

Diagnostics and Troubleshoo...
7.4.1 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. Maximum 15 mA or minimum 590 Ω.
WARNING/ALARM 2, Live zero error
The signal on terminal 53 or 54 is less than 50% of the
value set in:
•
Parameter 6-10 Terminal 53 Low Voltage.
•
Parameter 6-12 Terminal 53 Low Current.
•
Parameter 6-20 Terminal 54 Low Voltage.
•
Parameter 6-22 Terminal 54 Low Current.
WARNING 4, Mains phase loss
7 7
A phase is missing on the supply side, or the mains
voltage imbalance is too high.
WARNING 5, DC-link voltage high
The DC-link voltage (DC) is higher than the high-voltage
warning limit. The unit is still active.
WARNING 6, DC-link voltage low
The DC-link voltage (DC) is below the low-voltage warning
limit. The unit is still active.
WARNING/ALARM 7, DC overvoltage
If the DC-link voltage exceeds the limit, the unit trips.
WARNING/ALARM 8, DC under voltage
If the DC-link voltage (DC) drops below the undervoltage
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, Overcurrent
The unit current limit has been exceeded.
ALARM 14, Ground fault
The sum current of the IGBT CTs does not equal 0. Check if
the resistance of any phase-to-ground has a low value.
Check both before and after mains contactor. Ensure that
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 time-out
There is no communication to the unit.
The warning is only active when parameter 8-04 Control
Word Timeout Function is not set to off.
Possible correction: Increase parameter 8-03 Control Word
Timeout Time. Change parameter 8-04 Control Word Timeout
Function
78
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VLT Refrigeration Drive FC 103 Low Harmonic Drive
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 defective hardware or fans
not mounted.
ALARM 29, Heat sink temp
The maximum temperature of the heat sink has been
exceeded. The temperature fault is not reset until the
temperature drops 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 overtemperature
Control card overtemperature: 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.
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