Danfoss VLT series, Service Manual

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VLT is a registered Danfoss trademark
WARNING/ALARM 44
ENCODER FAULT
(Not applicable for the VLT 4000/6000/8000.)
This message active for VLT 5000 units programmed for Speed
Closed Loop operation only. The measured feedback differs
from the reference by more than 3 x slip RPM.
The encoder signal is interrupted from terminal 32 or 33.
Check the connections of encoder device.
ALARM 60
EXTERNAL FAULT
Parameter 304 has been programmed for Safety Interlock and
a logic “0” is present at terminal 27.
Terminal 27 must have a logic “1” for the unit to operate.
This fault can be manually reset.
The following Warning/Alarms are only
applicable to the VLT 4000/6000/8000 series
drives.
WARNING: 62
FOUT>FHIGH
Output frequency high.
The output frequency is higher than the value programmed in
parameter 224
Warning: High frequency.
This is a customer programmable indicator of operating
conditions.
No corrective action needed.
WARNING/ALARM: 63
I MOTOR<I LOW
Output current low.
The output current is lower than the value programmed in
parameter 221
Warning: Low current
Select the required function in parameter 409 function in case
of no load.
WARNING: 64
I MOTOR>I HIGH
The output current is higher than the value programmed in
parameter 222
Warning: High current.
This is a customer programmable indicator of operating
conditions.
No corrective action needed.
WARNING: 65
FEEDBACK<FDB LOW
The resulting feedback value is lower than the value
programmed in parameter 227
Warning: Low feedback.
This is a customer programmable indicator of operating
conditions.
No corrective action needed.
WARNING: 66
FEEDBACK>FDB HIGH
The resulting feedback value is higher than the value
programmed in parameter 228
Warning: High feedback.
This is a customer programmable indicator of operating
conditions.
No corrective action needed.
WARNING: 67
REF.<REF LOW
Remote reference low.
The remote reference is lower than parameter 225 Warning:
Low reference.
This is a customer programmable indicator of operating
conditions.
No corrective action needed.
WARNING: 68
REF.>REF HIGH
The remote reference is higher than the value programmed in
parameter 226
Warning: High reference.
This is a customer programmable indicator of operating
conditions.
No corrective action needed.
WARNING: 69
TEMP.AUTO DERATE
Temperature auto derate. The heatsink temperature has
exceeded the max value and the auto derating function (par.
411) is active.
Warning: Temp. auto derate.
See Warning/Alarm 29
WARNING: 99
UNKNOWN ALARM
An unknown fault has occurred which the software is not able
to handle.
This may be due to noise interference, or a faulty Control Card.
Cycle power and or reinitialize the VLT to clear the fault. Possible
replacement of control card is needed.