E-01Â Inverter Module Breakdown fault in Toshiba drive
E-01 Inverter Module Breakdown fault in Toshiba drive
Description E-01 is one of the most severe fault codes a Toshiba drive can display. It is specifically distinct from "OC" (Overcurrent). While OC means current was too high, E-01 means the drive's internal diagnostics have detected that an IGBT (Insulated Gate Bipolar Transistor) is physically damaged or acting abnormally during the gate-check phase. This fault often appears immediately upon power-up or the instant a Run command is given. It signifies "Hardware Death" in many cases. Causes
1. IGBT Explosion: One of the output transistors has physically blown apart due to a massive short circuit.
2. Gate Driver Failure: The small firing board that turns the IGBT on and off has failed, leaving the transistor floating or stuck in a half-open state.
3. Shoot-Through: The top and bottom transistors in a phase leg fired simultaneously, creating a direct short across the DC bus.
4. Lightning/Surge: A massive voltage spike jumped the MOVs and destroyed the power stage. Solution Do not repeatedly reset and try to run this fault. Doing so can cause a physical fire or explosion inside the drive.
You must perform a static check of the main transistors. Disconnect power and wait 10 minutes. Use a multimeter in "Diode Mode." Check from the Negative Bus Terminal (-) to each output (U, V, W), and from the Positive Bus Terminal (+) to each output. You should see a consistent diode drop (around 0.3V to 0.5V) in the forward direction and "OL" (Open) in the reverse.
If you read 0.00V (Short) on any leg, the IGBT module is destroyed. The drive cannot be fixed in the field and requires shop repair or replacement. If the IGBTs measure fine, the failure is likely in the "Gate Driver" circuit on the main control board, which also requires board replacement.
Description E-01 is one of the most severe fault codes a Toshiba drive can display. It is specifically distinct from "OC" (Overcurrent). While OC means current was too high, E-01 means the drive's internal diagnostics have detected that an IGBT (Insulated Gate Bipolar Transistor) is physically damaged or acting abnormally during the gate-check phase. This fault often appears immediately upon power-up or the instant a Run command is given. It signifies "Hardware Death" in many cases. Causes
1. IGBT Explosion: One of the output transistors has physically blown apart due to a massive short circuit.
2. Gate Driver Failure: The small firing board that turns the IGBT on and off has failed, leaving the transistor floating or stuck in a half-open state.
3. Shoot-Through: The top and bottom transistors in a phase leg fired simultaneously, creating a direct short across the DC bus.
4. Lightning/Surge: A massive voltage spike jumped the MOVs and destroyed the power stage. Solution Do not repeatedly reset and try to run this fault. Doing so can cause a physical fire or explosion inside the drive.
You must perform a static check of the main transistors. Disconnect power and wait 10 minutes. Use a multimeter in "Diode Mode." Check from the Negative Bus Terminal (-) to each output (U, V, W), and from the Positive Bus Terminal (+) to each output. You should see a consistent diode drop (around 0.3V to 0.5V) in the forward direction and "OL" (Open) in the reverse.
If you read 0.00V (Short) on any leg, the IGBT module is destroyed. The drive cannot be fixed in the field and requires shop repair or replacement. If the IGBTs measure fine, the failure is likely in the "Gate Driver" circuit on the main control board, which also requires board replacement.
Comments
Post a Comment