Danfoss VLT FC 102 Programming Manual page 286

Troubleshooting
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Parameter 15-40 FC Type.
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Parameter 15-41 Power Section.
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Parameter 15-42 Voltage.
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Parameter 15-43 Software Version.
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Parameter 15-45 Actual Typecode String.
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Parameter 15-49 SW ID Control Card.
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4 4
Parameter 15-50 SW ID Power Card.
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Parameter 15-60 Option Mounted.
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Parameter 15-61 Option SW Version (for each
option slot).
ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
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Remove the power to the frequency converter
and repair the short circuit.
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to use qualified personnel to install, start up, and
maintain the frequency converter can result in death or
serious injury.
•
Disconnect power before proceeding.
WARNING/ALARM 17, Control word timeout
There is no communication to the frequency converter.
The warning is only active when parameter 8-04 Control
Timeout Function is NOT set to [0] Off.
If parameter 8-04 Control Timeout Function is set to [5] Stop
and trip, a warning appears, and the frequency converter
ramps down to a stop and shows an alarm.
Troubleshooting
•
Check the connections on the serial communi-
cation cable.
•
Increase parameter 8-03 Control Timeout Time.
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Check the operation of the communication
equipment.
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Verify that proper EMC installation was
performed.
ALARM 18, Start failed
The speed has not been able to exceed
parameter 1-77 Compressor Start Max Speed [RPM] during
start within the allowed time. (set in
parameter 1-79 Compressor Start Max Time to Trip). This may
be caused by a blocked motor.
WARNING 23, Internal fan fault
The fan warning function is a protective function that
checks if the fan is running/mounted. The fan warning can
be disabled in parameter 14-53 Fan Monitor ([0] Disabled).
284
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VLT HVAC Drive FC 102
For drives with DC fans, a feedback sensor is mounted in
the fan. If the fan is commanded to run and there is no
feedback from the sensor, this alarm appears. For drives
with AC fans, the voltage to the fan is monitored.
Troubleshooting
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WARNING 24, External fan fault
The fan warning function is a protective function that
checks if the fan is running/mounted. The fan warning can
be disabled in parameter 14-53 Fan Monitor ([0] Disabled).
For drives with DC fans, a feedback sensor is mounted in
the fan. If the fan is commanded to run and there is no
feedback from the sensor, this alarm appears. For drives
with AC fans, the voltage to the fan is monitored.
Troubleshooting
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WARNING 25, Brake resistor short circuit
The brake resistor is monitored during operation. If a short
circuit occurs, the brake function is disabled and the
warning appears. The frequency converter is still
operational, but without the brake function.
Troubleshooting
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WARNING/ALARM 26, Brake resistor power limit
The power transmitted to the brake resistor is calculated as
an average value over the last 120 s of run-time. The
calculation is based on the DC-link voltage and the brake
resistor value set in parameter 2-16 AC brake Max. Current.
The warning is active when the dissipated braking power
is higher than 90% of the brake resistor power. If option [2]
Trip is selected in parameter 2-13 Brake Power Monitoring,
the frequency converter trips when the dissipated braking
power reaches 100%.
WARNING/ALARM 27, 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
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Danfoss A/S © 10/2019 All rights reserved.
Check for proper fan operation.
Cycle power to the drive and check that the fan
operates briefly at start-up.
Check the sensors on the control card.
Check for proper fan operation.
Cycle power to the drive and check that the fan
operates briefly at start-up.
Check the sensors on the heat sink.
Remove the power to the frequency converter
and replace the brake resistor (refer to
parameter 2-15 Brake Check).
Remove power to the frequency converter and
remove the brake resistor.
M0010001