•
15-50 SW ID Power Card
•
15-60 Option Mounted
•
15-61 Option SW Version (for each option slot)
ALARM 16, Short circuit
There is short-circuiting in the motor or motor wiring.
Troubleshooting
•
Remove the power to the frequency converter
and repair the short-circuit.
WARNING/ALARM 17, Control word timeout
There is no communication with the frequency converter.
The warning is only active when 8-04 Control Word Timeout
Function is not set to [0] Off.
If 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 displays an alarm.
Troubleshooting
•
Check the connections on the serial communi-
cation cable.
•
Increase 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
Report value shows what kind it is.
0 = The torque reference was not reached before timeout
(parameter 2-27 Torque Ramp 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 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 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 (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 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 >90% of the brake resistance 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
If the brake transistor is short-circuited, there is a risk of
substantial power being transmitted to the brake
resistor.
WARNING/ALARM 27, Brake chopper fault
The brake transistor 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 transistor 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 alarm/warning could also occur if the brake resistor
overheats. Terminals 104 and 106 are available as brake
resistors Klixon inputs.
WARNING/ALARM 28, Brake check failed
The brake resistor is not connected or not working.
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 defined heat sink temperature.
The trip and reset points vary based on the frequency
converter power size.
Troubleshooting
Check for the following conditions.
•
Ambient temperature too high.
•
Motor cables too long.
•
Incorrect airflow clearance above and below the
frequency converter.
•
Blocked airflow around the frequency converter.
•
Damaged heat sink fan.
•
Dirty heat sink.
Warnings and Alarms
Operating Instructions
MG37A202 Danfoss A/S © Rev. 2014-07-29 All rights reserved. 125
9 9
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