Danfoss VLT series User Manual

WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to perform installation, start-up, and maintenance
by qualied personnel can result in death or serious
injury.
•
Disconnect power before proceeding.
WARNING/ALARM 17, Control word timeout
There is no communication with the frequency converter.
The warning is only active when parameter 8-04 Control
Word Timeout Function is not set to [0] O.
If parameter 8-04 Control Word Timeout Function is set to [2]
Stop and [26] Trip, a warning appears and the frequency
converter ramps down until it trips and then shows an
alarm.
Troubleshooting
•
Check the connections on the serial communi-
cation cable.
•
Increase parameter 8-03 Control Word Timeout
Time.
•
Check the operation of the communication
equipment.
•
Verify a proper installation based on EMC
requirements.
WARNING/ALARM 22, Hoist mechanical brake
The value of this warning/alarm shows the type of
warning/alarm.
0 = The torque reference was not reached before timeout
(parameter 2-27 Torque Ramp Up Time).
1 = Expected brake feedback not received before timeout
(parameter 2-23 Activate Brake Delay, parameter 2-25 Brake
Release Time).
WARNING 23, Internal fan fault
The fan warning function is an extra protective function
that checks if the fan is running/mounted. The fan warning
can be disabled in parameter 14-53 Fan Monitor ([0]
Disabled).
Troubleshooting
•
Check the fan resistance.
•
Check the soft charge fuses.
WARNING 24, External fan fault
The fan warning function is an extra protective function
that checks if the fan is running/mounted. The fan warning
can be disabled in parameter 14-53 Fan Monitor ([0]
Disabled).
Troubleshooting
•
Check the fan resistance.
•
Check the soft charge fuses.
WARNING 25, Brake resistor short circuit
The brake resistor is monitored during operation. If a short
circuit occurs, the brake function is disabled and the
warning appears. The frequency converter is still
operational, but without the brake function.
Troubleshooting
•
Remove the power to the frequency converter
and replace the brake resistor (refer to
parameter 2-15 Brake Check).
WARNING/ALARM 26, Brake resistor power limit
The power transmitted to the brake resistor is calculated as
a mean value over the last 120 s of run time. The
calculation is based on the DC-link voltage and the brake
resistor value set in parameter 2-16 AC brake Max. Current.
The warning is active when the dissipated braking is >90%
of the brake resistor power. If [2] Trip is selected in
parameter 2-13 Brake Power Monitoring, the frequency
converter trips when the dissipated braking power reaches
100%.
WARNING
HIGH VOLTAGE ON THE BRAKE RESISTOR
If the brake transistor is short-circuited, there is a risk of
substantial power being transmitted to the brake
resistor.
•
Find and x the reason for exceeding the power
limit.
WARNING/ALARM 27, Brake chopper fault
The brake IGBT is monitored during operation. If a short
circuit occurs, the brake function is disabled and a warning
is issued. The frequency converter is still operational, but
since the brake IGBT has short-circuited, substantial power
is transmitted to the brake resistor, even if it is inactive.
Remove the power to the frequency converter and remove
the brake resistor.
This warning/alarm could also occur if the brake resistor
overheats. Terminals 104 and 106 are available as brake
resistors Klixon inputs.
The 12-pulse frequency converter may generate this
warning/alarm when one of the disconnects or circuit
breakers is opened while the unit is on.
WARNING/ALARM 28, Brake check failed
The brake resistor is not connected or not working.
Troubleshooting
•
Check parameter 2-15 Brake Check.
ALARM 29, Heat Sink temp
The maximum temperature of the heat sink has been
exceeded. The temperature fault resets when the
temperature falls below a dened heat sink temperature.
The trip and reset points vary based on the frequency
converter power size.
Warnings and Alarms
VLT
®
AutomationDrive FC 302
86 Danfoss A/S © 04/2016 All rights reserved. MG34Q402
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Danfoss VLT series Specifications

General

Series	VLT
Category	DC Drives
Output Voltage	0-100% of input voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault
Communication Interfaces	Profibus, CANopen
Enclosure Rating	IP20, IP21, IP55, IP66
Cooling Method	Forced Air Cooling, Convection Cooling
Control Mode	Sensorless Vector, Closed Loop Vector
Ambient Temperature	-10°C to +50°C (14°F to 122°F)