CFW500 troubleshooting answers
6 questions with answers cited from the manufacturer manuals.
- 0WEG CFW500 F0051: IGBT overtemperature, what to check first?
The F0051 fault indicates that the power module's internal temperature sensor (P0030) has reached its overtemperature trip level, which varies by inverter model and frame. An A0050 alarm will appear 5 °C below this trip …
- 0WEG CFW500 trips F0074 at start or while running, what to check?
Fault F0074 on a WEG CFW500 inverter indicates a ground overcurrent, meaning an overcurrent from an output phase to ground (PE). This protection acts instantly in hardware to cut output pulses. It can occur at start or w…
- 0WEG CFW500 trips F0072 (Motor Overload) after a motor change, why?
Fault F0072 indicates that the inverter's motor overload function (Ixt) has detected excessive winding heating, estimated by integrating the output current above the set overload current. This can happen during sustained…
- 0WEG CFW500 trips F0070 instantly at start, even with no load, what to check?
The F0070 fault on a WEG CFW500 inverter indicates an overcurrent or short circuit on the output, DC link, or braking resistor. An instant trip at start, especially with no load, strongly suggests a short circuit in the …
- 0WEG CFW500 trips F0022 on deceleration, what to check?
The F0022 fault on a WEG CFW500 inverter indicates that the DC link voltage has exceeded its maximum allowed level for the configured supply. This often happens during deceleration, especially with high-inertia loads, as…
- 0WEG CFW500 trips F0021 at power-up, what to check?
The F0021 fault on a WEG CFW500 inverter indicates that the DC link voltage has dropped below its minimum threshold for the configured supply. This can happen due to issues with the incoming power supply, incorrect volta…