Danfoss VLT Aqua Drive FC 202 Operating Manual page 43

Maintenance, Diagnostics, a...
ALARM 14, Earth (ground) fault
There is current from the output phases to ground, either
in the cable between the frequency converter and the
motor, or in the motor itself.
Troubleshooting
•
Remove power from the frequency converter and
repair the ground fault.
•
Check for ground faults in the motor by
measuring the resistance to ground of the motor
cables and the motor with a megohmmeter.
•
Perform current sensor test.
ALARM 15, Hardware mismatch
A fitted option is not operational with the present control
board hardware or software.
Record the value of the following parameters and contact
the local Danfoss supplier:
•
Parameter 15-40 FC Type.
•
Parameter 15-41 Power Section.
•
Parameter 15-42 Voltage.
•
Parameter 15-43 Software Version.
•
Parameter 15-45 Actual Typecode String.
•
Parameter 15-49 SW ID Control Card.
•
Parameter 15-50 SW ID Power Card.
•
Parameter 15-60 Option Mounted.
•
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
•
Remove power from the frequency converter and
repair the short circuit.
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 until it trips, then it shows an alarm.
Troubleshooting
•
Check the connections on the serial communi-
cation cable.
•
Increase parameter 8-03 Control Timeout Time.
•
Check the operation of the communication
equipment.
•
Verify a proper installation based on EMC
requirements.
MG20MD02
Operating Guide
WARNING/ALARM 22, Hoist mechanical brake
When this warning is active, the LCP shows the type of
issue.
0 = The torque ref. was not reached before timeout.
1 = There was no brake feedback before timeout.
WARNING 23, Internal fan fault
The fan warning function is an extra protective function
that checks if the fan is running/mounted. The fan warning
can be disabled in parameter 14-53 Fan Monitor ([0]
Disabled).
Troubleshooting
•
•
WARNING 24, External fan fault
The fan warning function is an extra protective function
that checks if the fan is running/mounted. The fan warning
can be disabled in parameter 14-53 Fan Monitor ([0]
Disabled).
Troubleshooting
•
•
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. Remove power
from the frequency converter and replace the brake
resistor (see parameter 2-15 Brake Check).
WARNING/ALARM 26, Brake resistor power limit
The power transmitted to the brake resistor is calculated as
a mean value over the last 120 s of run time. The
calculation is based on the DC-link voltage and the brake
resistance value set in parameter 2-16 AC brake Max.
Current. The warning is active when the dissipated braking
is higher than 90% of the brake resistance power. If [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 chopper fault
The brake transistor is monitored during operation. 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.
Remove power from the frequency converter and remove
the brake resistor.
This alarm/warning could also occur if the brake resistor
overheats. Terminals 104 and 106 are available as brake
resistor Klixon inputs, see Brake Resistor Temperature Switch
in the design guide.
WARNING/ALARM 28, Brake check failed
The brake resistor is not connected or not working.
Check parameter 2-15 Brake Check.
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Check the fan resistance.
Check the soft charge fuses.
Check the fan resistance.
Check the soft charge fuses.
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