Danfoss VLT AQUA Drive FC 202 Operating Manual page 90

Maintenance, Diagnostics, a...
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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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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).
There is short-circuiting in the motor or motor wiring.
WARNING
HIGH VOLTAGE
Drives contain high voltage when connected to AC mains
input, DC supply, or load sharing. Failure to perform
installation, start-up, and maintenance by qualified
personnel can result in death or serious injury.
ALARM 16, Short circuit
Troubleshooting
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Remove the power to the drive and repair the
9 9
short circuit.
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Check that the drive contains the correct current
scaling card and the correct number of current
scaling cards for the system.
WARNING/ALARM 17, Control word timeout
There is no communication to the drive.
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 drive ramps down to
a stop and shows an alarm.
Troubleshooting
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Check the connections on the serial communi-
cation cable.
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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.
WARNING/ALARM 20, Temp. input error
The temperature sensor is not connected.
WARNING/ALARM 21, Parameter error
The parameter is out of range. The parameter number is
shown in the display.
Troubleshooting
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Set the affected parameter to a valid value.
WARNING/ALARM 22, Hoist mechanical brake
The value of this warning/alarm indicates the cause:.
0 = The torque reference was not reached before timeout
(parameter 2-27 Torque Ramp Time).
88
VLT® AQUA Drive FC 202
1 = Expected brake feedback was not received before
timeout (parameter 2-23 Activate Brake Delay,
parameter 2-25 Brake Release Time).
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).
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).
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. This alarm also shows if there is
a communication error between the power card and the
control card.
Check the alarm log for the report value associated with
this warning.
If the report value is 1, there is a hardware problem with 1
of the fans. If the report value is 11, there is a communi-
cation problem between the power card and the control
card.
Fan troubleshooting
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Power card 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 drive is still operational, but without
the brake function.
Troubleshooting
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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.
Cycle power to the drive and check that the fan
operates briefly at start-up.
Check for proper fan operation. Use parameter
group 43-** Unit Readouts to show the speed of
each fan.
Check the wiring between the power card and
the control card.
Power card may need to be replaced.
Control card may need to be replaced.
Remove the power to the drive and replace the
brake resistor (refer to parameter 2-15 Brake
Check).
MG21A502