Interactive diagnostic wizard for Hayward EcoStar variable-speed pump fault codes including PFC-Hi, Prime Failed, AC Mains Low, Drive Overheated, Stall Error, SVRS Tripped, and Warning No Comm.
Select the symptom or fault code your EcoStar is displaying to get step-by-step troubleshooting guidance.
Click a symptom or fault code to see diagnostic steps.
This interactive troubleshooting wizard is designed specifically for the Hayward EcoStar and EcoStar SVRS variable-speed pumps (models SP3400VSP and SP3400VSPVR). Whether you are a pool homeowner trying to decode a fault message on your pump display or a service technician running a structured diagnostic, the wizard adapts to your role and provides the appropriate level of guidance.
Select the "Homeowner" role for safe, practical checks you can perform yourself, or switch to "Technician" mode for detailed diagnostic procedures including voltage measurements, drive inspections, and communication wire testing. Each symptom card links to the relevant diagnostic steps from the official Hayward troubleshooting guide.
The table below summarizes the most common Hayward EcoStar fault codes and their meanings. Click the troubleshooter above for step-by-step diagnosis of each code.
| Fault Code | Description |
|---|---|
| PFC-Hi | Overvoltage detected — AC mains supply exceeding 280 volts |
| Prime Failed | Pump unable to prime within 15 minutes of startup |
| Power Interrupt | Brief power interruption of less than 45 seconds detected |
| AC Mains Low | Main voltage feed dropped below 185 VAC |
| Drive Overheated | Internal drive components have become overheated |
| Heat Sink Overheat | Problem detected inside the EcoStar drive heat sink |
| Stall Error | Drive failed to start after 3 attempts — failure in drive, motor, or both |
| SVRS Tripped | Safety vacuum release system detected abnormal amperage variation (SVRS models only) |
| Warning No Comm | Display and drive are not communicating with each other |
| Memory Failure | Drive memory has been damaged or corrupted |
For a complete walkthrough of every fault code with photos and wiring diagrams, see the full Hayward EcoStar troubleshooting guide.
PFC-Hi indicates the drive detected an overvoltage condition with AC mains supply exceeding 280 volts. This is not an indication that something is wrong with the pump or drive itself. Power cycle by shutting off the breaker for at least 2 minutes, verify the screen is blank, then restore power. If the error frequently reoccurs and the pump is controlled by Hayward automation, wire the pump to the filter relay load side so it power-cycles at least once every 24 hours.
Prime Failed means the pump was unable to prime within 15 minutes of startup. This can occur in Stand Alone or Relay Control/Auto Prime modes. Common causes include air leaks on the suction side plumbing, a damaged pump basket lid O-ring, or clogged skimmer and pump baskets. If plumbing pipe sizes are smaller than 2 inches, Auto Prime may not work properly and should be changed to a 3-minute manual prime period through the Configuration Menu.
The pump attempts to start three times before displaying a stall error. Either message implies there is a failure inside the drive, the motor, or both. The most common cause is water ingress. A technician should inspect the motor and drive for water damage. If the motor moves freely and shows no water damage, check the three connections between the drive and motor. If connections are correct, the drive likely needs replacement. After replacing the drive, run the pump on quick clean for 20 minutes to verify the motor has not been damaged.
SVRS Tripped only appears on EcoStar SVRS models. It means the safety vacuum release system detected drive amperage varying beyond the threshold, and the pump will become idle for a minimum of 15 minutes. Check the filter, skimmer, and pump baskets for obstructions. Eliminate features that change vacuum pressures such as automatic cleaners or solar heating. If connected to Hayward Automation, verify that freeze protection is not causing the trip and that the filter off valve change feature is enabled.
When the breaker continually trips, the problem is either a short to ground, the drive, or the breaker itself. Start by verifying the incoming power wires are clean and not shorting to the cover plate. Then disconnect the pump from mains and engage the breaker. If it still trips, the wiring has a short or the breaker is bad. If it does not trip, check the voltage being supplied (should be 200-250 VAC) and verify the breaker type. GFCI breakers are more susceptible to nuisance tripping. The Siemens QF220 has proven effective for resolving GFCI nuisance trips.
Yes. Select the "Homeowner" role and the wizard will show only the checks that are safe and practical for a non-professional to perform. Technician-level steps such as voltage measurements and drive component inspections are hidden unless you switch to Technician mode. The EcoStar operates on 200-250 volts AC, so always follow the safety warnings on screen and consult a qualified pool service professional for any repair you are not comfortable performing.
PoolDial helps pool service professionals manage customers, routes, billing, and equipment tracking from one place. Try it free for 30 days.
Start Free Trial