See rating
for the voltage limits.
Troubleshooting:
•
Make sure that the supply voltage matches the
filter voltage.
•
Perform input voltage test (
•
Check the soft charge circuit
WARNING/ALARM 13, Over current
The inverter peak current limit (approximately 300% of the
rated current) is exceeded. In general, it points to a high
error in the current control loop due to damage of the
active filter hardware. Unexpected high voltage spikes in
the AC line voltage can cause an overcurrent alarm as well.
If this alarm occurs again after alarm reset, it indicates an
active filter hardware defect.
See
for current trip points.
Troubleshooting:
•
Check the IGBT and LCL filter components
•
Perform input voltage test (
ALARM 14, Ground fault
Sum current, measured by internal inverter IGBT current
transducers, doesn’t equal zero. There is a discharge from
the line phases to ground, either in the cable between the
filter and line power or in the filter itself.
Trip level equals 50% of filter nominal current.
Troubleshooting:
•
Turn off the filter
•
Measure the resistance to ground of the LCL filter
components leads with a megohmmeter to check
for ground faults
•
Measure line to line voltages on line power active
filter terminals. All three voltages should be equal
to the nominal voltage of the installation.
ALARM 15, Hardware mismatch
A fitted option is not operational with the present control
board hardware or software. Check any replacement parts
and their programming.
Record the value of the following parameters and contact
your Danfoss supplier:
15-40 FC Type
15-41 Power Section
15-42 Voltage
15-43 Software Version
15-45 Actual Typecode String
15-49 SW ID Control Card
15-50 SW ID Power Card
15-60 Option Mounted
15-61 Option SW Version
(for each option slot)
ALARM 16, Short circuit
There is short-circuiting in the IGBT inverter or on the
inverter terminals.
Trip level equals approximately 120% of the overcurrent
trip levels (see
Troubleshooting:
•
Check the IGBTs
•
Replace the power card.
WARNING/ALARM 17, Control word timeout
There is no communication to the filter.
The warning will only be active when
8-04 Control Word
Timeout Function
is NOT set to
OFF
.
If
8-04 Control Word Timeout Function
is set to
Stop
and
Trip
, a warning appears and the filter ramps down until it
trips, while giving an alarm.
Troubleshooting:
•
Check connections on the serial communication
cable
•
Increase
8-03 Control Word Timeout Time
•
Check the operation of the communication
equipment
•
Verify a proper installation based on EMC
requirements
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).
The regulated voltage to the fans is monitored.
Troubleshooting:
•
Check fan fuse
•
Check fan resistance (see
).
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).
The regulated voltage to the fans is monitored.
Troubleshooting:
•
Check fan fuse
•
Check fan resistance (see
).
Troubleshooting
VLT Advanced Active Filter AAF006 D and E Frames Service Manual
MG90Z122 - VLT
®
is a registered Danfoss trademark
4-7
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