control keypad
vacon 81
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
7
Fault
code
Fault
Possible cause
Correcting measures
44
Device changed
(different type)
Option board or control unit changed.
Option board of different type or
different power rating of drive.
Reset
Set the option board parameters
again if option board was changed.
Note: No fault time data record!
Note: Application parameter values
restored to default.
45
Device added
(different type)
Option board or drive added.
Option board of different type or drive
of different power rating added.
Reset
Set the power unit parameters
again.
Note: No fault time data record!
Note: Application parameter values
restored to default.
49
Division by zero
in application
Division by zero has occurred in
application program.
Should the fault re-occur while the
AC drive is in run state, contact the
distributor near to you.
For local contacts, go to:
http://drives.danfoss.com/danfoss-
drives/local-contacts/
If you are an application
programmer, check the application
program.
50
Analogue input
(sel. signal
range 4 to 20
mA)
Current at the analogue input is <
4mA.
control cable is broken or loose
signal source has failed
Check the current loop circuitry.
51
External fault
Digital input fault.
Remove fautl situation on external
device.
52
Keypad
communication
fault
There is no connection between the
control keypad and the inverter.
Check keypad connection and
possible keypad cable.
53
Fieldbus fault
The data connection between the
fieldbus Master and the fieldbus
board is broken
Check installation.
If installation is correct contact the
nearest distributor.
For local contacts, go to:
http://drives.danfoss.com/danfoss-
drives/local-contacts/
54
Slot fault
Defective option board or slot
Check board and slot.
Contact the nearest distributor.
For local contacts, go to:
http://drives.danfoss.com/danfoss-
drives/local-contacts/
56
PT100 board
temp. fault
Temperature limit values set for the
PT100 board parameters have been
exceeded
Find the cause of temperature rise
57
Identification
Identification run has failed
Run command was removed before
completion of identification run.
The motor is not connected to the AC
drive.
There is load on motor shaft.
