Nx Networks NX series - Manual (Page 85)

Fault tracing 85(86)
9
14 Frequency
converter over
temperature Heatsink temperature is over 90
°
C.
Over temperature warning is issued when
the heatsink temperature exceeds 85
°
C.
Check the correct amount and flow of
cooling air.
Check the heatsink for dust.
Check the ambient temperature.
Make sure that the switching frequency
is not too high in relation to ambient
temperature and motor load.
15 Motor stalled Motor stall protection has tripped. Check motor.
16 Motor
overtemperature Motor overheating has been detected by
frequency converter motor temperature
model. Motor is overloaded. Decrease the motor load.
If no motor overload exists, check the
temperature model parameters.
17 Motor underload Motor underload protection has tripped.
22
23 EEPROM
checksum fault Parameter save fault
−
faulty operation
−
component failure
24 Changed data
warning Changes may have occurred in the
different counter data due to mains
interruption No special actions required. Take a
critical attitude to the counter data.
25 Microprocessor
watchdog fault
−
faulty operation
−
component failure
Reset the fault and restart.
Should the fault re-occur, contact your
nearest distributor.
32 Fan cooling Cooling fan of the frequency converter
does not start, when ON command is
given Contact your nearest distributor.
34 CAN bus
communication 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 units
37 Device change Option board changed.
Different power rating of drive. Reset
38 Device added Option board added.
Drive of different power rating added. Reset
39 Device removed Option board removed.
Drive removed. Reset
40 Device unknown Unknown option board or drive.
41 IGBT temperature IGBT Inverter Bridge overtemperature
protection has detected too high a short
term overload current Check loading.
Check motor size.
42 Brake resistor
overtemperature Brake resistor overtemperature protection
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.
50 Analogue input
I
in
< 4mA
(selected 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
communication
fault The connection between the control
keypad and the frequency converter is
broken. Check keypad connection and possible
keypad cable.
Table 9-1. Fault codes