2. Plug and unplug the inverter CUVC board again. CUVC board is in good contact and not inserted.
3. Check whether the trigger board or power module of the inverter is damaged, and replace the trigger board or power module again.
4. The trigger board is broken, which leads to the pulse problem. Test the trigger pulse with parameter p372 to determine whether the trigger board works.
Extended data:
Alarm 29-Overheating
Overheating is also a fault we usually encounter. Then let's first think about whether the cooling fan is running. Danfoss adopts on/off control mode in fan control. The temperature sensor samples the temperature signal, and the output voltage is adjusted by the chopper circuit to control the speed of the fan, which not only saves electricity, but also prolongs the life of the fan.
Current limiting operation
In normal operation, we may encounter the current limit suggested by the inverter. For the common frequency converter that can't work normally and smoothly when the current limit alarm occurs, the voltage (frequency) must be reduced first until the current falls to the allowable range. Once the current is lower than the allowable value, the voltage (frequency) will rise again, leading to system instability.
Alarm 37-IGBT module is damaged.
The igbt module is damaged, which is also one of the common faults of inverter damage. Motor jitter, three-phase current, voltage imbalance, frequency display but no voltage output are all common phenomena of igbt module damage. There are many reasons for igbt module damage. First of all, the damage of igbt module is caused by the failure of external load, such as short circuit and lock-up of load.