80 vacon
control keypad
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
7
Fault
code
Fault
Possible cause
Correcting measures
35
Application
Problem in application software.
Contact the nearest distributor.
For local contacts, go to:
http://drives.danfoss.com/danfoss-
drives/local-contacts/
If you are an application
programmer, check the application
program.
36
Control unit
Software function requires newer
control board.
Change control unit
37
Device changed
(same type)
Option board or control unit changed.
Same type of board or same power
rating of drive. The parameters are
available in the drive.
Reset. The device is ready for use.
The drive starts to use the old
parameter settings.
Note: No fault time data record!
38
Device added
(same type)
Option board or drive added.
Drive of same power rating or same
type of board added. The parameters
are available in the drive.
Reset The device is ready for use.
The drive starts to use the old
parameter settings.
Note: No fault time data record!
39
Device
removed
Option board removed.
Drive removed.
The device is not available. Reset
Note: No fault time data record!
40
Device
unknown
S1 = Unknown
device
S2 = Power1
not same type
as Power2
Unknown option board or drive.
Contact the nearest distributor.
For local contacts, go to:
http://drives.danfoss.com/danfoss-
drives/local-contacts/
41
IGBT
temperature
IGBT Inverter Bridge overtemperature
protection has detected too high a
short term overload current
Check loading.
Check motor size.
Make an identification run.
42
Internal brake
resistor
overtemperature
Internal brake resistor
overtemperature protection has
detected too heavy braking
Set the deceleration time longer.
Use external brake resistor.
43
Encoder fault
1 = Encoder 1
channel A is
missing
2 = Encoder 1
channel B is
missing
3 = Both
encoder 1
channels are
missing
4 = Encoder
reversed
5 = Encoder
board missing
Note the exceptional Fault data
record. See 7.3.4.3. Additional codes:
1 = Encoder 1 channel A is missing
2 = Encoder 1 channel B is missing
3 = Both encoder 1 channels are
missing
4 = Encoder reversed
Check encoder channel connections.
Check the encoder board.
Check the encoder frequency in the
open loop.