Danfoss FC 100 Series Operating Instructions Manual page 128

Troubleshooting
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot. Select whether the frequency converter gives
a warning or an alarm when the counter reaches 100% in
par. 1-90 Motor Thermal Protection. The fault is that the motor
is overloaded by more than 100% for too long.
Troubleshooting:
Check if motor is over heating.
If the motor is mechanically overloaded
That the motor par. 1-24 Motor Current is set correct-
ly.
Motor data in parameters 1-20 through 1-25 are set
correctly.
The setting in par. 1-91 Motor External Fan.
Run AMA in par. 1-29 Automatic Motor Adaptation
(AMA).
WARNING/ALARM 11, Motor thermistor over temp
8 8
The thermistor or the thermistor connection is disconnected.
Select whether the frequency converter gives a warning or an
alarm when the counter reaches 100% in par. 1-90 Motor
Thermal Protection.
Troubleshooting:
Check if motor is over heating.
Check if the motor is mechanically overloaded.
Check that the thermistor is connected correctly
between terminal 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 Thermistor Source 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 par. 4-16 Torque Limit
Motor Mode or the torque is higher than the value in
par. 4-17 Torque Limit Generator Mode. Par. 14-25 Trip Delay at
Torque Limit can be used to change this from a warning only
condition to a warning followed by an alarm.
WARNING/ALARM 13, Over current
The inverter peak current limit (approx. 200% of the rated
current) is exceeded. The warning lasts about 1.5 sec., then the
frequency converter trips and issues an alarm. If extended
mechanical brake control is selected, trip can be reset
externally.
128
®
VLT HVAC Drive Operating Instructions
Troubleshooting:
ALARM 14, Earth (ground) fault
There is a discharge from the output phases to earth, either in
the cable between the frequency converter and the motor or
in the motor itself.
Troubleshooting:
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:
ALARM 16, Short circuit
There is short-circuiting in the motor or on the motor
terminals.
Turn off the frequency converter and remove the short-circuit.
WARNING/ALARM 17, Control word timeout
There is no communication to the frequency converter.
The warning will only be active when par. 8-04 Control Timeout
Function is NOT set to OFF.
If par. 8-04 Control Timeout Function is set to Stop and Trip, a
warning appears and the frequency converter ramps down
until it trips, while giving an alarm.
®
MG.11.AD.02 - VLT is a registered Danfoss trademark
This fault may be caused by shock loading or fast
acceleration with high inertia loads.
Turn off the frequency converter. Check if the motor
shaft can be turned.
Check that the motor size matches the frequency
converter.
Incorrect motor data in parameters 1-20 through
1-25.
Turn off the frequency converter and remove the
earth fault.
Measure the resistance to ground of the motor leads
and the motor with a megohmmeter to check for
earth faults in the motor.
Perform current sensor test.
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