WARNING/ALARM 11, Motor thermistor over temp
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
Troubleshooting:
Check if motor is over heating.
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 program-
ming 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.
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 con-
verter 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 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.
ALARM 14, Earth (ground) fault
There is a discharge from the output phases to earth, either in the ca-
ble between the frequency converter and the motor or in the motor it-
self.
Troubleshooting:
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.
ALARM 15, Hardware mismatch
A fitted option is not operational with the present control board hard-
ware 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 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 Func-
tion
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.
Troubleshooting:
Check connections on the serial communication cable.
Increase par. 8-03
Control Timeout Time
Check operation of the communication equipment.
Verify proper installation based on EMC requirements.
ALARM 18, Start failed
The speed has not been able to exceed par. 1-77
Compressor Start
Max Speed [RPM]
during start within the allowed time. (set in
par. 1-79
Compressor Start Max Time to Trip
).
This may be caused by a blocked motor.
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
par. 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.
8 Warnings and Alarms
VLT HVAC Drive High Power Operating In-
structions
182
MG.11.F3.02 - VLT
®
is a registered Danfoss trademark
8