E-36Â Input Voltage Sensor Failure fault in Toshiba drive
E-36 Input Voltage Sensor Failure fault in Toshiba drive
Description The drive monitors the incoming AC voltage and the DC bus voltage using a resistor divider network and isolation amplifier. E-36 indicates that this sensing circuit has failed. For example, the DC bus is actually charged to 600V, but the sensor reports 0V or 200V to the CPU. The CPU detects this discrepancy (logic mismatch) and trips E-36 to prevent undervoltage/overvoltage damage. Causes
1. Blown Resistor: One of the high-impedance resistors in the voltage divider chain has opened.
2. Isolation Amp Failure: The component transferring the voltage signal across the galvanic isolation barrier has died.
3. Ribbon Cable: The cable carrying analog signals from the Power Board to the Control Board is loose. Solution This is a board-level failure. You cannot fix this via parameters.
Perform a "DC Bus Check." Go to the Monitor menu and look at the DC Bus Voltage display. If the drive is powered by 480V AC, the DC bus should read approx 680V DC. If the multimeter on the physical terminals reads 680V, but the keypad display reads "0V" or "50V," the sensing circuit is definitely broken.
Try reseating the ribbon cables. If the value doesn't correct, the Power Board (or Main Board depending on architecture) must be replaced.
Description The drive monitors the incoming AC voltage and the DC bus voltage using a resistor divider network and isolation amplifier. E-36 indicates that this sensing circuit has failed. For example, the DC bus is actually charged to 600V, but the sensor reports 0V or 200V to the CPU. The CPU detects this discrepancy (logic mismatch) and trips E-36 to prevent undervoltage/overvoltage damage. Causes
1. Blown Resistor: One of the high-impedance resistors in the voltage divider chain has opened.
2. Isolation Amp Failure: The component transferring the voltage signal across the galvanic isolation barrier has died.
3. Ribbon Cable: The cable carrying analog signals from the Power Board to the Control Board is loose. Solution This is a board-level failure. You cannot fix this via parameters.
Perform a "DC Bus Check." Go to the Monitor menu and look at the DC Bus Voltage display. If the drive is powered by 480V AC, the DC bus should read approx 680V DC. If the multimeter on the physical terminals reads 680V, but the keypad display reads "0V" or "50V," the sensing circuit is definitely broken.
Try reseating the ribbon cables. If the value doesn't correct, the Power Board (or Main Board depending on architecture) must be replaced.
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