LED | LCD | Description |
| Possible Causes |
Display | Display |
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OC | Over Current |
| • | Defective IGBT (U, V, or W). |
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| ASD output current greater than | • ASD output to the motor is connected incorrectly. | |
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| F601 setting. | ||
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| Disconnect the motor and retry. | |
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| • ASD output | |
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| • The ASD is starting into a spinning motor. | |
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| • | Motor/machine jammed. |
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| • Mechanical brake engaged while the ASD is starting or | |
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| while running. |
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| • Accel/Decel time is too short. | |
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| • Voltage Boost setting is too high. | |
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| • | Load fluctuations. |
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| • ASD operating at an elevated temperature. | |
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*OH | Overheat |
| • | ASD is operating at an elevated temperature. |
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| ASD ambient temperature | • ASD is too close to | |
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| excessive. | ||
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| • Cooling fan vent is obstructed (see Mounting the H9 | |
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| ASD on pg. 15). |
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| • Cooling fan is inoperative. | |
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| • Internal thermistor is disconnected. | |
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OJ | Timer | • | Type Reset required; select Clear run timer. | |
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*OLI | ASD Overload |
| • | The carrier frequency is too high. |
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| Load requirement in excess of | • | An excessive load. |
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| the capability of the ASD. | ||
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| • Acceleration time is too short. | |
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| • DC damping rate is set too high. | |
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| • The motor is starting into a spinning load after a | |
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| momentary power failure. |
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| • The ASD is improperly matched to the application. | |
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OLM | Motor Overload |
| • | V/f parameter improperly set. |
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| Load requirement in excess of | • | Motor is locked. |
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| the capability of the motor. | ||
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| • Continuous operation at low speed. | |
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| • The load is in excess of what the motor can deliver. | |
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*OLR | Resistor | Excessive current at the | • | Deceleration time is too short. |
| Overload | Dynamic Braking Resistor. | • | DBR configuration improperly set. |
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248 | H9 ASD Installation and Operation Manual |