Danfoss VACON NX FI6 Operating Manual page 145

Operating Guide | VACON® NX Inverters FI4-FI8
Troubleshooting
• Cancel prevention of start-up if it can be done safely.
• Remove Run request.
12.10.75 Fault 29 - Thermistor fault, Subcode S1 - Thermistor input activated on OPTAF board
Cause
The thermistor input of option board has detected increase of the motor temperature.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
• Do a check of the motor cooling and loading.
• Do a check of the thermistor connection.
• (If thermistor input of the option board is not in use it has to be short-circuited).
12.10.76 Fault 29 - Thermistor fault, Subcode S2 - Special application
Cause
The thermistor input of option board has detected increase of the motor temperature.
It is possible to set different responses in the application for this fault. See parameter group Protections.
Troubleshooting
• Do a check of the motor cooling and loading.
• Do a check of the thermistor connection.
• (If thermistor input of the option board is not in use it has to be short-circuited).
12.10.77 Fault 30 - Safe disable
Cause
The input on OPTAF board has opened.
STO inputs SD1 and SD2 are activated through the OPTAF option board.
Troubleshooting
Cancel Safe Disable if it can be done safely.
12.10.78 Fault 31 - IGBT temperature (hardware)
Cause
IGBT Inverter Bridge overtemperature protection has detected too high a short-term overload current.
Danfoss A/S © 2019.07
Specifications
AQ299433367205en-000101 / DPD00908| 145