EOI | Function | Description |
| Possible Causes |
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*OLI | ASD Overload | Load requirement in excess of | • | The carrier frequency is too high. |
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| the capability of the ASD. | • | An excessive load. |
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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 | Load requirement in excess of | • | V/f parameter improperly set. |
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| the capability of the motor. | • | Motor is locked. |
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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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*OP | Overvoltage | DC bus voltage exceeds | • | ASD attempting to start into a spinning motor after a |
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| specifications. |
| momentary power loss. |
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| • Incoming utility power is above the specified range. | |
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| • Decel time is too short. | |
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| • Voltage spikes at the | |
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| filter. |
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| • | DBR required. |
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| • DBR resistance value is too high. | |
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| • DBR function is turned off. | |
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| • Overvoltage Stall feature is turned off. | |
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| • | System is regenerating. |
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| • | Load instability. |
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| • Disable the Ridethrough function (0302). | |
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OT | Overtorque | Torque requirement in excess of | • | ASD is not correctly matched to the application. |
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| the setting of parameter 0616 or | • Parameter 0616 or 0617 setting is too low. | |
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| 0617 for a time longer than the | ||
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| setting of parameter 0618. | • | Obstructed load. |
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*POFF | Control | Undervoltage condition at the 5, | • | Defective Control board. |
| Undervoltage | 15, or the 24 VDC supply. | • Excessive load on power supply. | |
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| • | Low input voltage. |
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PtSt | Reference Point | Two | • | Two speed reference frequency setpoints are too close to |
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| setpoint values are too close to |
| each other (increase the difference). |
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| each other. |
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UC | Undercurrent | Output current of the ASD is |
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| below the level defined at |
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| parameter 0611 and remains |
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| there for the time set at |
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| parameter 0612. |
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* Reset ignored if active. |
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148 | W7 ASD Installation and Operation Manual |