VLT® 5000 Crane
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Warnings and Alarms, 19-27
Warn-
ing/Alarm
Number
Display
Description
How to Handle
19 (w)
EE Error Power
Card
There is a fault on the power card EEPROM. The
frequency converter continues to function, but is
likely to fail at the next power-up.
Contact your Danfoss supplier
20 (w)
EE Error CTRL
Card
There is a fault in the EEPROM on the control card.
The frequency converter will continue to function,
but is likely to fail at the next power-up
Contact your Danfoss supplier
23
Brake Test Failed
The brake resistor test is only run after power-up. If
Warning
has been selected in parameter 404, the
warning appears when the brake test finds a fault.
If
Trip
has been selected in parameter 404, the
frequency converter will trip when the brake test
finds a fault.
The brake test may fail for the following
reasons:
No brake resistor connected or fault in the
connections; defective brake resistor or
defective brake transistor. A warning or alarm
means that the brake function is still active
25 (w)
Brake Resistor
Fault
The brake resistor monitored during operation and if
it short-circuits, the brake function is disconnected
and the warning appears. The frequency converter
is still able to work, although without the brake
function.
Turn off the frequency converter and replace
the brake resistor
26 (w)
Brake Pwr Warn
100%
The power transmitted to the brake resistor is
calculated as a percentage, as a mean value over
the last 120 sec., on basis of the resistance value
of the brake resistor (parameter 401) and the
intermediate circuit voltage. The warning is active
when the dissipated braking power is higher than
100%. If
Trip
has been selected in parameter 403,
the frequency converter will cut out while giving
the alarm.
Check parameter 403 and the regenerative
load
27 (w)
Brake IGBT Fault
The brake transistor is monitored during operation
and if it short-circuits, the brake function is
disconnected and the warning appears. The
frequency converter is still able to run, but since
the brake transistor has short-circuited, substantial
power will be transmitted to the brake resistor,
even if it is inactive.
Turn off the frequency converter and remove
the brake resistor, see warning below
Warning: There is a risk of substantial power
being transmitted to the brake resistor if
the brake transistor has short-circuited
MG.50.N4.02 - VLT is a registered Danfoss trademark
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