Record the value of the following parameters and contact
Danfoss.
•
Parameter 15-40 FC Type.
•
Parameter 15-41 Power Section.
•
Parameter 15-42 Voltage.
•
Parameter 15-43 Software Version.
•
Parameter 15-45 Actual Typecode String.
•
Parameter 15-49 SW ID Control Card.
•
Parameter 15-50 SW ID Power Card.
•
Parameter 15-60 Option Mounted.
•
Parameter 15-61 Option SW Version (for each
option slot).
ALARM 16, Short circuit
There is a short circuit in the motor or motor wiring.
Troubleshooting
•
Remove the power to the drive system and then
repair the short circuit.
WARNING/ALARM 17, Control word timeout
There is no communication with the drive system.
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 [5]
Stop and Trip, a warning appears, the drive system ramps
down until it stops, and then an alarm is displayed.
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 was not received before
timeout (parameter 2-23 Activate Brake Delay,
parameter 2-25 Brake Release Time).
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 drive system is still operational, but
without the brake function.
Troubleshooting
•
Remove the power to the drive system and then
replace the brake resistor (see
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 power
is higher than 90% of the brake resistor power. If option [2]
Trip is selected in parameter 2-13 Brake Power Monitoring,
the drive system trips when the dissipated braking power
reaches 100%.
WARNING/ALARM 27, Brake chopper fault
The brake transistor is monitored during operation, and if a
short circuit occurs, the brake function is disabled and a
warning is issued. The drive system is still operational, but
since the brake transistor has short-circuited, substantial
power is transmitted to the brake resistor, even if it is
inactive.
Troubleshooting
•
Remove power to the drive system and then
remove the brake resistor.
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 does not reset until the
temperature drops below a dened heat sink temperature.
The trip and reset points are dierent, based on the drive
system’s power size.
Troubleshooting
Check for the following conditions:
•
Ambient temperature too high.
•
Motor cables too long.
•
Incorrect airow clearance above and below the
drive system.
•
Blocked airow around the drive system.
•
Damaged heat sink fan.
•
Dirty heat sink.
ALARM 30, Motor phase U missing
Motor phase U between the drive system and the motor is
missing.
Troubleshooting
•
Remove the power from the drive system and
then check motor phase U.
ALARM 31, Motor phase V missing
Motor phase V between the drive system and the motor is
missing.
Troubleshooting
•
Remove the power from the drive system and
then check motor phase V.
Maintenance, Diagnostics, a...
VLT
®
Parallel Drive Modules
42 Danfoss A/S © 08/2017 All rights reserved. MG37L202
6
6
To Next Page
Loading...
Need help?
General