Danfoss VLT AutomationDrive FC 303 Instruction Manual page 65

Warnings and Alarms
terminal 50 (+10V supply) and that the terminal
switch for 53 or 54 is set for voltage. Check
1-93 Thermistor Source selects terminal 53 or 54.
When using digital inputs 18 or 19, check that
the thermistor is connected correctly between
either terminal 18 or 19 (digital input PNP only)
and terminal 50. Check 1-93 Thermistor Source
selects terminal 18 or 19.
WARNING/ALARM 12, Torque limit
The torque has exceeded the value in 4-16 Torque Limit
Motor Mode or the value in 4-17 Torque Limit Generator
Mode. 14-25 Trip Delay at Torque Limit can change this from
a warning only condition to a warning followed by an
alarm.
Troubleshooting
If the motor torque limit is exceeded during
ramp-up, extend the ramp-up time.
If the generator torque limit is exceeded during
ramp-down, extend the ramp-down time.
If torque limit occurs while running, possibly
8 8
increase the torque limit. Be sure the system can
operate safely at a higher torque.
Check the application for excessive current draw
on the motor.
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.
This fault may be caused by shock loading or fast
acceleration with high inertia loads. If extended mechanical
brake control is selected, trip can be reset externally.
Troubleshooting
Remove power and check if the motor shaft can
be turned.
Check that the motor size matches the Adjustable
frequency drive.
Check parameters 1-20 through 1-25 for correct
motor data.
ALARM 14, Ground fault
There is current from the output phases to ground, either
in the cable between the Adjustable frequency drive and
the motor or in the motor itself.
Troubleshooting
Remove power to the Adjustable frequency drive
and repair the ground fault.
Check for ground faults in the motor by
measuring the resistance to ground of the motor
leads and the motor with a megohmmeter.
8-6
VLT ® AutomationDrive Instruction
Manual
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 a short circuit in the motor or motor wiring.
Remove power to the Adjustable frequency drive and
repair 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 Timeout
Function is NOT set to [0] OFF.
If 8-04 Control Timeout Function is set to Stop and Trip, a
warning appears and the Adjustable frequency drive ramps
down until it stops then displays an alarm.
Troubleshooting
WARNING/ALARM 20, Temp. input error
The temperature sensor is not connected.
WARNING/ALARM 21, Parameter error
The parameter is out of range. The parameter number is
reported in the LCP. The affected parameter must be set to
a valid value.
WARNING/ALARM 22, Hoist mechanical brake
Report value will show what kind it is. 0 = The torque ref.
was not reached before timeout. 1 = There was no brake
feedback before timeout.
WARNING 23, Internal Fans
The fan warning function checks if the fan is running. The
fan warning can be disabled in 14-53 Fan Monitor.
®
MG.33.AI.22 - VLT is a registered Danfoss trademark
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
Check connections on the serial communication
cable.
Increase 8-03 Control Timeout Time
Check the operation of the communication
equipment.
Verify proper installation based on EMC
requirements.