Quick Answer: Hayward TriStar VS pumps display specific fault codes for voltage and drive issues. Error 64 means DC voltage low, error 65 means DC voltage high, and “PFC-Hi” indicates a power supply spike that has latched the drive. None of these mean the pump is damaged — they’re protective trips that clear with a proper breaker reset.
- Symptom: Numeric error code (64/65) or “PFC-Hi” message on TriStar VS display
- Most Likely Cause: Power supply spike or voltage fluctuation, not pump damage
- Fix Difficulty: Easy (breaker reset) to moderate (recurring faults)
- Time Needed: 10–20 minutes
The TriStar VS is a reliable pump, but its drive electronics are sensitive to power quality in a way older single-speed motors never were. That means these fault codes show up most often in neighborhoods where the power grid fluctuates.
What Each Code Means
- Error 64 — DC Voltage Low: A drop in the DC power supply latched the drive; it will not run until reset.
- Error 65 — DC Voltage High: A spike in the DC power supply latched the drive the same way.
- PFC-Hi: A power supply spike locked the pump — this is not an indication of pump damage, just a protective latch.
- Prime Failed: The pump couldn’t prime within its programmed window (commonly 15 minutes) — this points to a suction-side air leak or low water level, not the drive itself.
- Drive Overheated: Thermal protection has tripped, usually from restricted airflow around the motor or ambient heat above the drive’s rated limit.
- Communication Failed: The control pad can’t communicate with the drive unit, often a ribbon cable or connection issue rather than a motor fault.
The Reset Procedure
- Shut off the breaker to the pump.
- Wait 1 full minute.
- Turn the breaker back on — the pump should resume normal operation.
If a Hayward automation controller is connected, these voltage-related errors may show as numeric codes 64 and 65 instead of the on-pump PFC-Hi message.
How to Fix Recurring Faults
Frequent DC Voltage Errors
If resets aren’t holding, some installers wire the TriStar VS to the load side of the “filters” relay so the pump powers down for a portion of each day, which clears the latch automatically — though this will show a “Bridge Comm Error” on the controller when the pump is powered down, which is expected and not itself a fault.
Prime Failed
Check for air leaks at the lid o-ring and suction unions, and confirm the pool water level is adequate before assuming a drive problem.
Drive Overheated
Clear debris from motor vents and confirm the pump isn’t enclosed without airflow — Hayward’s guidance notes drives can trip if ambient air exceeds roughly 122°F in an unventilated equipment pad.
When to Call a Professional
If resets don’t clear the fault, or it returns within minutes of restarting, a technician should check incoming voltage under load per Hayward’s TriStar VS Technical Guide.
Prevention Tips
- Keep motor vents clear and avoid enclosing the pump without ventilation.
- Have an electrician check for voltage stability if faults recur frequently.
- Keep the lid o-ring in good condition to prevent Prime Failed errors.
FAQ
Does a PFC-Hi error mean my pump is broken?
No — it means the drive detected a power spike and locked itself as a protective measure. A breaker reset clears it in nearly every case.
Why do I keep getting DC voltage errors on windy or stormy days?
Utility grid fluctuations during storms are a common trigger — if it’s a recurring pattern, ask an electrician about power quality at your panel.