Fault
code
Fault
Subcode
in T.14
Possible cause
How to correct the fault
41
IGBT tempera-
ture
IGBT Inverter Bridge overtemperature
protection has detected too high a
short-term overload current.
Do a check of the loading.
Do a check of the motor frame size.
Make an identification run.
42
Brake resistor
overtempera-
ture
Brake resistor overtemperature protec-
tion has detected too heavy braking.
Set the deceleration time longer.
Use external brake resistor.
43
Encoder fault
1 = Encod-
er 1 chan-
nel A is
missing
Problem detected in encoder signals.
Do a check of the encoder connections.
Do a check of the encoder board.
Do a check of the encoder frequency in the
open loop.
2 = Encod-
er 1 chan-
nel B is
missing
3 = Both
encoder 1
channels
are miss-
ing
4 = Encod-
er reversed
5 = Encod-
er board
missing
44
(2)
Device
changed (dif-
ferent type)
Option board or power unit changed.
New device of different type or differ-
ent power rating.
Reset.
Set the option board parameters again if op-
tion board was changed.
If power unit was changed, set AC drive pa-
rameters again.
45
(2)
Device added
(different type)
Option board of different type added.
Reset.
Set the power unit parameters again.
49
Division by
zero in appli-
cation
Division by zero has occurred in appli-
cation program.
If the fault shows again while the AC drive is
in run state, ask instructions from the local
distributor.
For an application programmer: do a check
of the application program.
50
(1)
Analogue in-
put Iin < 4mA
(sel. signal
range 4 to 20
mA)
Current at the analog input is < 4 mA
control cable is broken or loose signal
source has failed.
Do a check of the current loop circuitry.
51
External fault
Digital input fault.
Remove fault situation on external device.
Specifications
Operating guide | VACON® NXS/NXP Air-cooled
DPD00910G
166 | Danfoss A/S ©
2018.06