Pump shows E15 overload; motor stops after running for a short period, especially at high speed.

Safety First: Turn OFF power and relieve system pressure before opening any equipment.

• Check system pressure and flow: Observe filter pressure and return flow. If pressure is high and flow is low, clean the filter and open all valves fully.
• Reduce maximum speed: Reprogram the Rheem controller to limit maximum RPM to a level that provides adequate flow without overloading the motor.
• Inspect wet end: Separate the motor from the pump housing. Check for signs of the impeller scraping the diffuser or volute. Replace worn diffuser or impeller and ensure proper assembly.
• Check motor bearings: Spin the motor shaft by hand. If it feels rough or noisy, replace the motor assembly.
• Test after adjustments: Reassemble, prime, and run at progressively higher speeds while monitoring current draw (if possible). If E15 recurs at moderate loads, the drive or motor may be failing internally.