108 • vacon
CONTROL KEYPAD
Tel. +358 (0)201 2121 • Fax +358 (0)201 212 205
7
Fault
code
Fault
Possible cause
Correcting measures
29
Thermistor
fault
The thermistor input of option board has
detected increase of the motor tempera-
ture
Check motor cooling and loading
Check thermistor connection
(If thermistor input of the option board is
not in use it has to be short circuited)
31
IGBT temperature
(hardware)
IGBT Inverter Bridge overtemperature
protection has detected too high a short-
term overload current
Check loading.
Check motor size.
34
CAN bus com-
munication
Sent message not acknowledged.
Ensure that there is another device on
the bus with the same configuration.
36
Control unit
NXS Control Unit can not control NXP
Power Unit and vice versa
Change control unit
37
Device changed
(same type)
Option board or control unit changed.
Same type of board or same power rating
of drive.
Reset
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.
Reset
Note: No fault time data record!
39
Device removed Option board removed.
Drive removed.
Reset
Note: No fault time data record!
40
Device un-
known
Unknown option board or drive.
Contact the distributor near to you.
Please visit:
http://www.vacon.com/wwcontacts.html
41
IGBT tempera-
ture
IGBT Inverter Bridge overtemperature
protection has detected too high a short
term overload current
Check loading.
Check motor size.
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
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.
44
Device changed
(different type)
Option board or control unit changed.
Option board of different type or different
power rating of drive.
Reset
Note: No fault time data record!
Note: Application parameter values re-
stored 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
Note: No fault time data record!
Note: Application parameter values re-
stored to default.
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
Check the current loop circuitry.
51
External fault
Digital input fault.
52
Keypad com-
munication
fault
The connection between the control key-
pad and the frequency converter is broken.
Check keypad connection and possible
keypad cable.