Danfoss VLT AQUA Drive FC 202 Instruction Manual page 45

Maintenance, Diagnostics an...
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15-40 FC Type
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15-41 Power Section
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15-42 Voltage
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15-43 Software Version
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15-45 Actual Typecode String
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15-49 SW ID Control Card
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15-50 SW ID Power Card
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15-60 Option Mounted
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15-61 Option SW Version (for each option slot)
ALARM 16, Short-circuit
There is short-circuiting in the motor or motor wiring.
Remove power to the adjustable frequency drive and
repair the short circuit.
WARNING/ALARM 17, Control word timeout
There is no communication to the adjustable frequency
drive.
The warning is only active when 8-04 Control Timeout
Function is NOT set to OFF.
If 8-04 Control Timeout Function is set to Stop and Trip, a
warning appears and the adjustable frequency drive ramps
down until it trips then displays an alarm.
Troubleshooting:
•
Check connections on the serial communication
cable
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Increase 8-03 Control Timeout Time
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Check the operation of the communication
equipment
•
Verify a proper installation based on EMC
requirements
WARNING/ALARM 22, Hoist mechanical brake
Report value shows what kind it is.
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 14-53 Fan Monitor ([0] Disabled).
Troubleshooting
•
Check fan resistance
•
Check soft charge fuses
MG20MA22
Instruction Manual
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 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 adjustable frequency drive is still
operational but without the brake function. Remove power
to the adjustable frequency drive and replace the brake
resistor (see 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 intermediate circuit voltage and
the brake resistance value set in 2-16 AC Brake Max.
Current. The warning is active when the dissipated braking
energy is higher than 90% of the brake resistance power. If
[2] Trip is selected in 2-13 Brake Power Monitoring, the
adjustable frequency drive trips when the dissipated
braking energy reaches 100%.
WARNING
There is a risk of substantial power being transmitted to
the brake resistor if the brake transistor is short-
circuited.
WARNING/ALARM 27, Brake chopper fault
The brake transistor is monitored during operation and if a
short circuit occurs, the brake function is disabled and a
warning is issued. The adjustable frequency drive 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 to the adjustable frequency drive and
remove the brake resistor.
This alarm/warning could also occur should the brake
resistor overheat. Terminals 104 and 106 are available as
brake resistors Klixon inputs, see Brake Resistor Temperature
Switch in the Design Guide.
Danfoss A/S © 10/2014 All rights reserved.
Check fan resistance
Check soft charge fuses
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