Danfoss VLT AutomationDrive FC 301 Programming Manual page 204

Troubleshooting
Troubleshooting
Remove power and check if the motor shaft can
be turned.
Check that the motor size matches the frequency
converter.
Check parameters 1-20 to 1-25 for correct motor
data.
ALARM 14, Earth (ground) fault
There is current from the output phases to ground, either
in the cable between the frequency converter and the
motor or in the motor itself.
5 5
Troubleshooting
Remove power to the frequency converter and
repair the earth fault.
Check for earth faults in the motor by measuring
the resistance to ground of the motor leads and
the motor with a megohmmeter.
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:
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 (for each option slot)
ALARM 16, Short circuit
There is short-circuiting 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 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 [5] Stop and
Trip, a warning appears and the frequency converter ramps
down until it stops then displays an alarm.
Troubleshooting
Check connections on the serial communication
cable.
Increase 8-03 Control Word Timeout Time
Check the operation of the communication
equipment.
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VLT AutomationDrive FC 301/302 Programming Guide
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 shows what kind it is.
0 = The torque ref. was not reached before time out
(Parameter 2-27).
1 = Expected brake feedback not received before time out
(Parameters 2-23, 2-25).
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).
For the D, E, and F Frame filters, the regulated voltage to
the fans is monitored.
Troubleshooting
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
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
power is higher than 90% of the brake resistance power. If
[2] Trip is selected in 2-13 Brake Power Monitoring, the
MG33MH02 - Rev. 2013-09-30
Verify a proper installation based on EMC
requirements.
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.
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.