terminal 18 or 19 (digital input PNP only) and
terminal 50.
If a KTY sensor is used, check for correct
connection between terminal 54 and 55.
If using a thermal switch or thermistor, check the
programming of parameter 1-93 matches sensor
wiring.
If using a KTY sensor, check the programming of
parameters 1-95, 1-96, and 1-97 match sensor
wiring.
WARNING/ALARM 12, Torque limit
The torque is higher than the value in
4-16 Torque Limit
Motor Mode
(in motor operation) or the torque is higher
than the value in
4-17 Torque Limit Generator Mode
(in
regenerative operation). Parameter 14-25 can be used to
change this from a warning only condition to a warning
followed by an alarm.
WARNING/ALARM 13, Overcurrent
The inverter peak current limit (approx. 200% of the rated
current) is exceeded. The warning lasts about 1.5 sec. Then
the adjustable frequency drive trips and issues an alarm. If
extended mechanical brake control is selected, trip can be
reset externally.
Troubleshooting:
This fault may be caused by shock loading or fast
acceleration with high inertia loads.
Turn off the adjustable frequency drive. Check if
the motor shaft can be turned.
Make sure that the motor size matches the
adjustable frequency drive.
Incorrect motor data in parameters 1-20 through
1-25.
ALARM 14, Ground Fault
There is a discharge from the output phases to ground,
either in the cable between the adjustable frequency drive
and the motor or in the motor itself.
Troubleshooting:
Turn off the adjustable frequency drive and
remove the ground fault.
Measure the resistance to ground of the motor
leads and the motor with a megohmmeter to
check for ground faults in the motor.
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
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 (for each option slot)
15-61 Option SW Version (for each option slot)
ALARM 16, Short circuit
There is short-circuiting in the motor or on the motor
terminals.
Turn off the adjustable frequency drive and remove the
short circuit.
WARNING/ALARM 17, Control word timeout
There is no communication to the adjustable frequency
drive.
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 adjustable frequency drive
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 proper installation based on EMC
requirements.
WARNING 23, Internal fan fault
The fan warning function is an extra protection function
that checks if the fan is running / mounted. The fan
warning can be disabled in
14-53 Fan Monitor
([0]
Disabled).
For the D, E, and F Frame drives, the regulated voltage to
the fans is monitored.
Troubleshooting:
Check fan resistance.
Check soft charge fuses.
WARNING 24, External fan fault
The fan warning function is an extra protection function
that checks if the fan is running / mounted. The fan
warning can be disabled in
14-53 Fan Monitor
([0]
Disabled).
For the D, E, and F Frame drives, the regulated voltage to
the fans is monitored.
Troubleshooting
VLT AQUA 12-Pulse High Power Instruction Manual
MG.20.Y1.22 - VLT
®
is a registered Danfoss trademark
8-5
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