Danfoss VLT FC 102 Operating Instructions Manual page 82

Diagnostics and Troubleshoo...
ALARM 68, Safe Torque Off (STO) activated
Safe Torque Off (STO) 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 parameter 5-19 Terminal 37 Safe Stop.
ALARM 69, Power card temperature
The temperature sensor on the power card is either too
hot or too cold.
ALARM 70, Illegal FC Configuration
Actual combination of control board and power board is
illegal.
ALARM 79, Illegal power section configuration
The scaling card is the incorrect part number or not
installed. Also MK102 connector on the power card could
not be installed.
ALARM 80, Unit initialised to default value
7 7
Parameter settings are initialised to default settings after a
manual reset.
ALARM 247, Power card temperature
Power card overtemperature. A report value indicates the
source of the alarm (from left):
1–4 inverter.
5–8 rectifier.
ALARM 250, New spare part
The power or switch mode supply has been exchanged.
Restore the filter type code in the EEPROM. Select the
correct type code in parameter 14-23 Typecode Setting
according to the label on the unit. Remember to select
Save to EEPROM to complete.
ALARM 251, New type code
The filter has a new type code.
ALARM 300, Mains cont. fault
The feedback from the mains contactor did not match the
expected value within the allowed time frame. Contact
Danfoss or supplier.
ALARM 301, SC cont. fault
The feedback from the soft charge contactor did not
match the expected value within the allowed time frame.
Contact Danfoss or supplier.
ALARM 302, Cap. overcurrent
Excessive current was detected through the AC capacitors.
Contact Danfoss or supplier.
80
®
VLT HVAC Drive FC 102 Low Harmonic Drive
ALARM 303, Cap. ground fault
A ground fault was detected through the AC capacitor
currents. Contact Danfoss or supplier.
ALARM 304, DC overcurrent
Excessive current through the DC-link capacitor bank was
detected. Contact Danfoss or supplier.
ALARM 305, Mains freq. limit
The mains frequency was outside the limits. Verify that the
mains frequency is within product specification.
ALARM 306, Compensation limit
The needed compensation current exceeds unit capability.
The unit runs at full compensation.
ALARM 308, Resistor temp
Excessive resistor heat sink temperature detected.
ALARM 309, Mains ground fault
A ground fault was detected in the mains currents. Check
the mains for shorts and leakage current.
ALARM 310, RTDC buffer full
Contact Danfoss or supplier.
ALARM 311, Switch. freq. limit
The average switching frequency of the unit exceeded the
limit. Verify that parameter 300-10 Active Filter Nominal
Voltage and parameter 300-22 CT Nominal Voltage are set
correctly. If so, contact Danfoss or supplier.
ALARM 312, CT range
Current transformer measurement limitation was detected.
Verify that the CTs used are an appropriate ratio.
ALARM 314, Auto CT interrupt
Auto CT detection has been interrupted.
ALARM 315, Auto CT error
An error was detected while performing auto CT detection.
Contact Danfoss or supplier.
WARNING 316, CT location error
The auto CT function could not determine the correct
locations of the CTs.
WARNING 317, CT polarity error
The auto CT function could not determine the correct
polarity of the CTs.
WARNING 318, CT ratio error
The auto CT function could not determine the correct
primary rating of the CTs.
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