3-11
VLT is a registered Danfoss trademark
WARNING/ALARM 36
MAINS FAILURE
(Not applicable for the VLT 4000/6000/8000.)
The mains failure function has been activated in parameter
407. A choice of actions is available including whether or not
to trip . A trip can be manually reset.
This is due to a loss of AC mains voltage.
Check AC mains voltage.
ALARM 37
INVERTER FAULT
Indicates an IGBT is defective.
This fault results in a Trip Locked condition.
NOTE: Do not reset and reattempt to start the drive without
taking corrective action. Further damage may result.
Faulty IGBT.
Measure gate to emitter resistance on all IGBTs.
WARNING 39
CHECK Parameter 104, 106
AMA function has detected an error in calculating motor data.
The settings in parameter 102, 104 or 106 are possibly set
incorrectly.
Check the setting and choose “Continue” or “Stop”. If stop is
selected AMA will have to be started over.
WARNING: 40
CHECK Parameter 103, 105
AMA function has detected an error in calculating motor data.
The settings in parameter 102, 103 or 105 are possibly set
incorrectly.
Check the setting and choose “Continue” or “Stop”. If stop is
selected AMA will have to be started over.
WARNING 41
MOTOR TOO BIG
AMA function has detected an error in calculating motor data.
The motor is too large for the VLT or the setting of parameter
102 is incorrect.
Check the motor and setting and choose “Continue” or “Stop”.
If stop is selected AMA will have to be started over.
WARNING 42
MOTOR TOO SMALL
AMA function has detected an error in calculating motor data.
The motor is too small for the VLT or the setting of parameter
102 is incorrect.
Check the motor and setting and choose “Continue” or “Stop”.
If stop is selected AMA will have to be started over.
ALARM 43
BRAKE FAULT
(Not applicable for the VLT 4000/6000/8000.)
A test of the brake function has failed.
The possible causes as shown in the display are listed below.
The numbers in brackets will be logged as the value in parameter
617.
These failures result in a Trip Locked condition.
Make corrections as needed.
[0] BRAKE CHECK FAILED
During power up the brake test failed to find a resistor connected,
or the resistance between terminals 81, 82 is too high.
Verify that the brake resistor is properly connected to terminals
81, 82.
[1] BRAKE RESISTOR FAULT
During the brake test the VLT 5000 has found a short circuit
at the brake terminals, or the resistance between terminals
81, 82 is too low.
Verify no shorts exist at the terminals and the brake resistor is
the proper value for the VLT 5000.
[2] BRAKE IGBT FAULT
The brake transistor is shorted
As a result of the shorted transistor substantial power may be
transmitted to the brake resistor.
Disconnect input power to the unit. Perform Brake IGBT Test
(5.2.11) in Section 5).
It may be possible to run the drive with the brake resistor
disconnected, however the braking function will be inoperative.
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