alarm when the counter reaches 100% in par. 1-90
. The fault is that the motor is overloaded by more than 100% for
too long.
Troubleshooting:
Check if the motor is overheating.
If the motor is mechanically overloaded
That the motor par. 1-24
Motor data in parameters 1-20 through 1-25 are set correctly.
The setting in par. 1-91
Motor External Fan
.
Automatic Motor Adaptation (AMA)
WARNING/ALARM 11, Motor thermistor overtemp
The thermistor or the thermistor connection is disconnected. Select
whether the adjustable frequency drive gives a warning or an alarm when
the counter reaches 100% in par. 1-90
Troubleshooting:
Check if the motor is overheating.
Check if the motor is mechanically overloaded.
Check that the thermistor is connected correctly between ter-
minal 53 or 54 (analog voltage input) and terminal 50 (+10 V
supply), or between 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 par. 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.
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:
Par. 15-40
FC Type
Par. 15-41
Power Section
Par. 15-42
Voltage
Par. 15-43
Software Version
Par. 15-45
Actual Typecode String
Par. 15-49
SW ID Control Card
Par. 15-50
SW ID Power Card
Par. 15-60
Option Mounted
Par. 15-61
Option SW Version
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 par. 8-04
Control Word Timeout
Function
is NOT set to OFF.
If par. 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 par. 8-03
Control Word Timeout Time
Check the operation of the communication equipment.
Verify proper installation based on EMC requirements.
9 Troubleshooting
VLT HVAC Low Harmonic Drive Instruction
Manual
9-6
MG.16.A1.22 - VLT
®
is a registered Danfoss trademark
9
