rEÂ Retry / Restart Count Exceeded fault in Toshiba drive
rE Retry / Restart Count Exceeded fault in Toshiba drive
Description "rE" is not a primary fault; it is the result of a persistent problem. Toshiba drives feature an "Auto-Restart" or "Retry" function (Parameter F303). This allows the drive to automatically reset itself after a fault (like Overcurrent or Overvoltage) and try to run again. The "rE" fault appears when the drive has used up all its allowed attempts (e.g., 5 tries) and the underlying fault is still present. It signifies, "I tried to fix it, but the problem is permanent." Causes
1. Permanent Short: The motor has a dead short that trips OC immediately every time the drive restarts.
2. Continuous Overload: The pump is jammed with debris; the drive resets, tries to spin, trips OL, resets, tries again... until the count hits zero.
3. Noise Spikes: Constant electrical noise triggering nuisance trips faster than the reset timer can handle. Solution Do not just reset the "rE" fault. You must look at the *Fault History* (Monitor mode -> Past Faults) to see what the *underlying* fault was. Was it OC1? OL1? OP?
If the history shows "OC1, OC1, OC1, OC1, rE," then your problem is Overcurrent (Short Circuit or Jam). Troubleshooting must focus on the motor and load, not the rE code itself.
If you want the drive to stop trying to restart (for safety reasons), set Parameter F303 (Retry Selection) to "0". This disables auto-restart. If you are in a remote application (like an unstaffed pump station) and need *more* retries, you can increase F303 to 10, but be warned: repeatedly restarting into a short circuit puts massive stress on the drive's capacitors and IGBTs, potentially leading to an explosion.
Description "rE" is not a primary fault; it is the result of a persistent problem. Toshiba drives feature an "Auto-Restart" or "Retry" function (Parameter F303). This allows the drive to automatically reset itself after a fault (like Overcurrent or Overvoltage) and try to run again. The "rE" fault appears when the drive has used up all its allowed attempts (e.g., 5 tries) and the underlying fault is still present. It signifies, "I tried to fix it, but the problem is permanent." Causes
1. Permanent Short: The motor has a dead short that trips OC immediately every time the drive restarts.
2. Continuous Overload: The pump is jammed with debris; the drive resets, tries to spin, trips OL, resets, tries again... until the count hits zero.
3. Noise Spikes: Constant electrical noise triggering nuisance trips faster than the reset timer can handle. Solution Do not just reset the "rE" fault. You must look at the *Fault History* (Monitor mode -> Past Faults) to see what the *underlying* fault was. Was it OC1? OL1? OP?
If the history shows "OC1, OC1, OC1, OC1, rE," then your problem is Overcurrent (Short Circuit or Jam). Troubleshooting must focus on the motor and load, not the rE code itself.
If you want the drive to stop trying to restart (for safety reasons), set Parameter F303 (Retry Selection) to "0". This disables auto-restart. If you are in a remote application (like an unstaffed pump station) and need *more* retries, you can increase F303 to 10, but be warned: repeatedly restarting into a short circuit puts massive stress on the drive's capacitors and IGBTs, potentially leading to an explosion.
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