Fault
code
Fault
Subcode in
T.14
Possible cause
How to correct the fault
44 **
Device changed
(different type)
Option board or power unit
changed.
New device of different type
or different power rating.
Reset.
Set the option board parameters
again if option board was changed.
Set converter parameters again if
power unit was changed.
45 **
Device added (dif-
ferent type)
Option board of different
type added.
Reset.
Set the power unit parameters
again.
49
Division by zero in
application
Division by zero has occur-
red in application program.
If the fault shows again while the
AC drive is in run state, ask
instructions from the distributor
near to you. If you are an applica-
tion programmer, do a check of the
application program.
50 *
Analogue input I
in
< 4mA (sel. signal
range 4 to 20 mA)
Current at the analogue
input is < 4mA. control cable
is broken or loose signal
source has failed.
Do a check of the current loop cir-
cuitry.
51
External fault
Digital input fault.
Remove fault situation on external
device.
52
Keypad communi-
cation fault
The connection between the
control panel (or NCDrive)
and the drive is defective.
Do a check of the control panel
connection and the control panel
cable.
53
Fieldbus fault
The data connection
between the fieldbus master
and the fieldbus board is
defective.
Do a check of the installation and
fieldbus master.
If the installation is correct, ask
instructions from the distributor
near to you.
54
Slot fault
Defective option board or
slot
Do a check of the board and slot.
Ask instructions from the distribu-
tor near to you.
56
Over Temp.
Temperature exceeded set
limit.
Sensor disconnected.
Short circuit.
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.
58 *
Brake
Actual status of the brake is
different from the control
signal.
Do a check of the mechanical brake
state and connections.
FAULT TRACING
VACON · 155
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