Pump display shows E03 and motor will not run

Safety first: Disconnect power at the breaker and lock it out if possible. Wait at least 5 minutes for capacitors in the drive to discharge.

• Inspect motor cable connections: Remove the drive cover on the Sta‑Rite variable‑speed pump. Check the multi‑pin connector or individual motor leads between the drive and motor. Ensure all connectors are fully seated and no pins are bent or corroded.
• Check for visible damage: Look for burn marks, melted plastic, or a burnt smell on the drive board and motor terminal area. Any such signs usually mean the drive or motor must be replaced.
• Test motor windings (advanced): With the motor disconnected and using an ohmmeter, measure resistance between each pair of motor leads. Values should be similar. An open circuit or drastically different reading indicates a failed stator.
• Re‑seat connectors and reset: Reconnect all harnesses firmly, reassemble the cover, restore power, and attempt to start the pump. If E03 returns immediately, the drive power stage or motor is likely defective.
• Do not bypass protections: Never attempt to bypass the drive or run the motor directly from line power; these motors are designed to be driven only by the integrated drive.