Reference guide for all Hayward EcoStar VS variable-speed pump “Check System” error codes. Search by error name or symptom to find causes and fixes.
Unlike traditional single-speed pumps that simply stop working when something goes wrong, the Hayward EcoStar VS displays detailed fault messages on its built-in LCD screen under the heading "Check System." These messages are the pump's built-in self-diagnostic system and provide specific information about what fault condition triggered the shutdown.
All EcoStar fault messages follow the format: Check System: [Fault Name] on the display. The pump stops running when a fault is active. Understanding what each message means helps you diagnose and correct the issue before calling for service.
The EcoStar is available in two configurations: the standard EcoStar R and the EcoStar SVRS (Safety Vacuum Release System). The SVRS version includes an additional circuit that monitors for suction entrapment events and can physically release vacuum on the drain. Both models share the same error code set, but the SVRS Tripped message is only applicable to the SVRS model. If you have a standard EcoStar R and see SVRS-related faults, there may be a wiring or control board issue.
The most common source of EcoStar faults in real-world installations is variable-speed programming. Customers or contractors frequently configure time-based programs with the pump running at very low RPMs during off-peak hours to save energy. If that low-speed program is active when the pool heater, cleaner, or automation system calls for full flow, the result is flow-related faults on the heater or check system messages on the pump itself. Always verify that all connected equipment receives adequate flow at every programmed speed.
Prime Failed means the pump ran through its auto-prime cycle and was unable to establish water flow within the configured time limit. The most common causes are an air leak on the suction side of the pump (leaking lid o-ring, cracked union, or loose fitting), low water level in the pool, or a clogged pump basket. Remove and inspect the pump basket, check the lid o-ring, and look for bubbles in the pump strainer pot while the pump is running. Also verify the suction pipe is at least 2 inches in diameter, as undersized suction is a common prime failure cause in older installations.
To reset an EcoStar fault, press and hold the Stop button for 3 seconds. The pump will clear the fault and attempt to restart. If the fault returns immediately, the underlying condition has not been corrected. Do not repeatedly reset without addressing the root cause, as this can mask a developing problem and potentially damage the drive electronics.
No Comm means the RS-485 communication link between the EcoStar and your automation system has been interrupted. Common causes are reversed polarity on the RS-485 wiring (A and B terminals swapped), incorrect device address configured on the pump, a missing termination resistor at the end of the RS-485 bus, or the automation system being offline. Start by verifying the wiring polarity matches the automation system's requirements and that the EcoStar's device address is set correctly per the automation system's documentation.
Not necessarily. Drive Overheated means the variable-frequency drive (VFD) inside the motor housing has exceeded its thermal limit, not that the motor windings have failed. The most common causes are poor ventilation around the pump, direct sun exposure heating the motor housing above ambient, or the pump being installed in a confined space without air circulation. Add ventilation, shade the pump motor, or relocate the pump if ambient conditions are routinely causing overheating. If the fault occurs even in normal conditions, the thermal sensor or drive electronics may need inspection.
Yes. The EcoStar is designed to integrate with Hayward automation systems via RS-485 communication. The pump's speed is then controlled directly by the automation system rather than by the pump's own keypad schedule. If you experience No Comm errors after connecting to automation, verify the RS-485 address is set correctly (typically address 1 for the primary pump) and that the A/B wiring is not reversed.
PFC-Hi (Power Factor Correction High) typically occurs when the supply voltage is outside the acceptable range for the drive electronics. After a power restoration event, check that the voltage at the pump terminals (while running) is between 208 and 253V (for a 230V installation). A voltage reading significantly above 240V can trigger this fault. Also verify there are no loose connections at the terminal block, as intermittent connections can cause voltage spikes that trigger PFC-Hi.
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