Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 65

Diagnostics and Troubleshoo...
Troubleshooting
•
Remove power to the frequency converter and
repair the ground fault.
•
Check for ground faults in the motor by
measuring the resistance to the ground of the
motor cables and the motor with a
megohmmeter.
•
Perform current sensor test.
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
Danfoss:
•
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 [2] Stop and
[26] Trip, a warning appears and the frequency converter
ramps down until it trips and 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.
•
Verify a proper installation based on EMC
requirements.
WARNING/ALARM 22, Hoist mechanical brake
Report value shows what kind it is.
0 = The torque ref. was not reached before time out
(2-27 Torque Ramp Time).
1 = Expected brake feedback not received before time out
(2-23 Activate Brake Delay, 2-25 Brake Release Time).
MG21B202
Operating Instructions
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
•
•
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.
Troubleshooting
•
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 higher than 90% of the brake resistance power. If [2] Trip
is selected in 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 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.
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 2-15 Brake Check.
Danfoss A/S © Rev. 2014-01-22 All rights reserved.
Check fan resistance.
Check soft charge fuses.
Check fan resistance.
Check soft charge fuses.
Remove power to the frequency converter and
replace the brake resistor (see 2-15 Brake Check).
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