Danfoss VLT AQUA Drive FC 200 Operating Instructions Manual page 63

Warnings and Alarms
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
ALARM 16, Short circuit
There is a short circuit in the motor or motor wiring.
Remove power to the frequency converter and repair the
short circuit.
WARNING/ALARM 17, Control word timeout
There is no communication to the frequency converter.
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 frequency converter ramps down
until it stops then displays an alarm.
8 8
Troubleshooting
Check connections on the serial communication
cable.
Increase 8-03 Control Timeout Time
Check operation of the communication
equipment.
Verify proper installation based on EMC
requirements.
WARNING 23, Internal fan fault
The fan warning function checks if the fan is running. The
fan warning can be disabled in 14-53 Fan Monitor.
Troubleshooting
Check for proper fan operation.
Cycle power to the frequency converter and
check that the fan operates briefly at start up.
Check the sensors on the heatsink and control
card.
WARNING 24, External fan fault
The fan warning function checks if the fan is running. The
fan warning can be disabled in 14-53 Fan Monitor.
Troubleshooting
Check for proper fan operation.
Cycle power to the frequency converter and
check that the fan operates briefly at start up.
Check the sensors on the heatsink and control
card.
60
®
VLT AQUA Drive
Operating Instructions
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. Remove power
to the frequency converter and replace the brake resistor
(see 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 seconds of run time. The
calculation is based on the intermediate circuit voltage and
the brake resistance value set in 2-16 AC brake Max.
Current. The warning is active when the dissipated braking
is higher than 90% of the brake resistance power. If Trip [2]
is selected in 2-13 Brake Power Monitoring, the frequency
converter will trip 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 frequency converter is still
operational but, since the brake transistor has short-
circuited, substantial power is transmitted to the brake
resistor, even if it is inactive.
Remove power to the frequency converter and remove the
brake resistor.
WARNING/ALARM 28, Brake check failed
The brake resistor is not connected or not working.
Check 2-15 Brake Check.
ALARM 29, Heatsink temp
The maximum temperature of the heatsink has been
exceeded. The temperature fault will not reset until the
temperature falls below the reset heatsink temperature.
The trip and reset points are based on the frequency
converter power size.
Troubleshooting
Check for the following conditions.
ALARM 30, Motor phase U missing
Motor phase U between the frequency converter and the
motor is missing.
Remove power from the frequency converter and check
motor phase U.
ALARM 31, Motor phase V missing
Motor phase V between the frequency converter and the
motor is missing.
®
MG.20.M8.02 - VLT is a registered Danfoss trademark
Ambient temperature too high.
Motor cable too long.
Incorrect airflow clearance above and below the
frequency converter.
Blocked airflow around the frequency converter.
Damaged heatsink fan.
Dirty heatsink.