Danfoss VLT FC 102 Programming Manual page 291

Troubleshooting
ALARM 99, Locked rotor
An overload condition was detected. This condition can
indicate a locked rotor. Inspect the motor for proper
operation.
WARNING/ALARM 104, Mixing fan fault
The fan is not operating. The fan monitor checks that the
fan is spinning at power-up or whenever the mixing fan is
turned on. The mixing-fan fault can be configured as a
warning or an alarm trip in parameter 14-53 Fan Monitor.
Troubleshooting
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Cycle power to the frequency converter to
determine if the warning/alarm returns.
WARNING 200, Fire mode
The frequency converter is operating in fire mode. The
warning clears when fire mode is removed. Refer to the
fire mode data in the alarm log.
WARNING 201, Fire mode was active
The frequency converter has entered fire mode. Cycle
power to the unit to remove the warning. Refer to the fire
mode data in the alarm log.
WARNING 202, Fire mode limits exceeded
While operating in fire mode, 1 or more alarm conditions
that would normally trip the unit have been ignored.
Operating in this condition voids unit warranty. Cycle
power to the unit to remove the warning. Refer to the fire
mode data in the alarm log.
WARNING 203, Missing motor
With a frequency converter operating multi-motors, an
underload condition was detected. This condition can
indicate a missing motor. Inspect the system for proper
operation.
WARNING 204, Locked rotor
With a frequency converter operating multi-motors, an
overload condition was detected. This condition can
indicate a locked rotor. Inspect the motor for proper
operation.
ALARM 243, Brake IGBT
The brake transistor is monitored during operation, and if a
short circuit occurs, the brake function is disabled, and a
warning is issued. The frequency converter is still
operational, but since the brake transistor has short-
circuited, substantial power is transmitted to the brake
resistor, even if it is inactive.
Troubleshooting
•
Remove power to the frequency converter and
remove the brake resistor.
The alarm description is the same as Warning/Alarm 27,
Brake IGBT.
ALARM 244, Heat Sink Temp
The maximum temperature of the heat sink is exceeded.
The temperature fault is not reset until the temperature
drops below a defined heat sink temperature. The trip and
reset points are different based on the frequency converter
M0010001
Programming Guide
power size. The alarm description is the same as Alarm 29,
Heat Sink Temp.
Troubleshooting
Check for the following conditions:
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ALARM 245, Heat Sink Sensor
No feedback from the heat sink temperature sensor.
The signal from the IGBT thermal sensor is not available on
the power card. The problem could be on the power card,
on the gatedrive card, or the ribbon cable between the
power card and gatedrive card. The alarm description is
the same as Alarm 39, Heat Sink Sensor.
ALARM 246, Power card supply
This alarm is only for enclosure size F frequency converters.
It is equivalent to Alarm 46, Power card supply.
The report value in the alarm log indicates which power
module generated the alarm:
ALARM 247, Power Card Temperature
The temperature sensor on the power card is either too
hot or too cold. The alarm description is the same as Alarm
69, Power Card Temperature.
Troubleshooting
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ALARM 248, Power Card Temp
The scaling card has an incorrect part number or is not
installed. The MK102 connector on the power card could
not be installed. The alarm description is the same as
Alarm 79, Illegal power section configuration.
WARNING 250, New spare part
The power or switch mode supply has been exchanged.
Restore the drive type code in the EEPROM. Select the
correct type code in parameter 14-23 Typecode Setting
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The ambient temperature is too high.
The motor cables are too long.
Incorrect airflow clearance above and below the
frequency converter.
Blocked airflow around the frequency converter.
Damaged heat sink fan.
Dirty heat sink.
1 = Inverter module to the far left.
2 = Middle inverter module in F2 or F4 frequency
converter.
2 = Right inverter module in F1 or F3 frequency
converter.
3 = Right inverter module in F2 or F4 frequency
converter.
5 = Rectifier module.
Check that the ambient operating temperature is
within limits.
Check for clogged filters.
Check fan operation.
Check the power card.
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