Hayward Super Pump VS 700 Tripping Breaker: How to Find and Fix the Fault

Parker Conley • Last updated: March 2026 | Hayward Super Pump VS 700

Hayward Super Pump VS 700 Tripping Breaker

Quick Summary

A breaker that trips when the pump runs indicates either an overcurrent condition (the pump is drawing more current than the breaker is rated for) or a ground fault (current is leaking to ground and the GFCI detects the imbalance). These are different problems with different diagnostic paths and different safety implications. Identify which type of trip you have before investigating further.

Identify trip type: immediate trip on startup = likely short or ground fault; delayed trip = likely overcurrent or thermal
GFCI trips on as little as 5mA of ground leakage — a healthy pump can trip a sensitive GFCI
Disconnect the motor from the drive before resetting to isolate whether fault is in wiring, drive, or motor
Never repeatedly reset a breaker that trips immediately — this indicates a hard fault that must be cleared first
Do not bypass the GFCI to "solve" a GFCI trip — it is detecting a real or potential ground fault that could electrocute someone

Understanding the Two Types of Breaker Trips

Pool pump breakers can trip for two completely different reasons, and the diagnostic approach is different for each.

Overcurrent trip (thermal-magnetic breaker)

A standard circuit breaker trips when current exceeds its rating for long enough to heat the bimetallic strip inside the breaker. A breaker that trips after the pump has been running for 15–30 minutes is likely tripping on overcurrent — the current draw is too high for the breaker. This points to a motor problem (drawing excess current due to mechanical overload, low voltage, or winding damage), or a breaker that has weakened from repeated trips and now trips below its rated current.

Ground fault trip (GFCI breaker)

A GFCI breaker trips when it detects more than approximately 5 milliamps of current imbalance between the hot and neutral conductors — meaning some current is leaking to ground rather than returning through the neutral. Pool equipment GFCI breakers trip instantly when the imbalance threshold is exceeded. A GFCI trip that occurs immediately on startup, or exactly when the pump starts to run, usually indicates a ground fault in the wiring or motor.

Step 1: Identify the Trip Pattern

Before resetting the breaker, characterize the trip:

Trips immediately when the breaker is reset (before the pump even starts): Hard short in the wiring, a shorted motor winding, or a failed drive component. Do not continue resetting — diagnose the short first.
Trips at the moment the pump starts: Likely a GFCI trip triggered by startup current transient, or a ground fault that appears when voltage is applied to the motor. Isolate by disconnecting the motor leads.
Trips after running for some time: Overcurrent — motor is drawing too much for the breaker's rating, or a thermal condition in the breaker itself. Measure running current with a clamp meter.
Trips only when the pump runs at high speed: The pump may be properly sized for the breaker at low speeds but exceed the breaker rating at high speed. Verify the breaker is rated for the motor's maximum current.

Step 2: Measure Running Current

If the breaker trips after running, measure the actual current the pump draws. This requires a clamp meter that can read AC current — place the clamp around one of the load conductors (either the hot wire or the neutral, not both together) while the pump is running.

Turn off the breaker and open the junction box. Identify the load conductors connecting the breaker to the motor.
Restore power and allow the pump to start and run at the speed setpoint it was using when the trip occurred.
Using a clamp meter, measure the current in the hot conductor. Compare this to the motor nameplate full-load amperage (FLA) rating.
If the measured current significantly exceeds the nameplate FLA (more than 10–15%), the motor is drawing excessive current. Common causes: a jammed or partially blocked impeller, low supply voltage, or degraded motor windings.
If the measured current is at or below the nameplate FLA but the breaker still trips, the breaker itself may be weakened or set too close to the actual current draw. A breaker that has been tripped many times can weaken internally and trip below its rated value. Replace the breaker.

Step 3: Isolate a Ground Fault

If the GFCI trips immediately or at startup, isolate whether the ground fault is in the motor or the wiring by disconnecting the motor from the circuit.

Turn off the breaker. Open the motor junction box.
Disconnect all load conductors from the motor terminals, leaving the wiring connected to the breaker but not to the motor.
Reset the breaker. If it holds, the ground fault is in the motor or in the connection between the junction box and the motor windings — the motor needs to be replaced or professionally rewound.
If the breaker trips again with the motor disconnected, the ground fault is in the wiring between the breaker and the junction box. Inspect the conduit and wiring for damage: rodent damage, conduit abrasion, water immersion, or insulation breakdown at a tight bend.

Step 4: Evaluate the GFCI Breaker Itself

GFCI breakers are required by NEC for pool pump circuits and provide critical protection — do not bypass them or replace them with a standard breaker. However, GFCI breakers can trip on nuisance conditions that do not represent an actual shock hazard:

Some VS drives generate a small amount of capacitive leakage current to ground that can be enough to trigger a sensitive GFCI breaker on startup. This is a real ground current, not a false reading — it is produced by the drive's internal EMI filtering capacitors connecting the DC bus to ground.
Long conduit runs with multiple conductors can accumulate enough capacitive coupling between conductors to produce detectable leakage current.
An aging or weakened GFCI breaker may trip at currents below its nominal 5mA threshold.

If the motor and wiring test clean (no fault to ground with a megohmmeter) but the GFCI still trips, the issue may be the combination of the VS drive's normal leakage current and the GFCI breaker's sensitivity. In this case, consult the VS drive manufacturer for the recommended GFCI breaker model. Some drives specify particular breaker models that are compatible with their leakage characteristics.

Never Bypass the GFCI

The NEC requires GFCI protection for pool pump circuits because water and electricity in close proximity create electrocution risk. A GFCI breaker that trips in response to a pool pump is detecting a real ground current. Even if that current is below the threshold that would cause immediate electrocution, it indicates a potential fault path that could worsen over time.

Do not replace a GFCI breaker with a standard breaker to "fix" a GFCI trip. Do not add a jumper between the neutral and the GFCI's test circuit to defeat its function. Both are NEC violations and create genuine electrocution hazards. If a GFCI continues to trip after all legitimate faults have been eliminated, contact Hayward technical support with the drive model and the GFCI breaker model to determine the correct replacement breaker.

Frequently Asked Questions

The breaker only trips when the pump runs at full speed — is it undersized?

Possibly. The breaker must be rated for at least 125% of the motor's full-load amperage per NEC 430.52 requirements for motor circuits. If the pump draws near its nameplate FLA at maximum speed and the breaker is sized exactly at FLA rather than 125% of FLA, the breaker will trip. Have a licensed electrician verify the breaker sizing matches the motor nameplate and NEC requirements for the installation.

The breaker trips only in the summer — what is happening?

Heat affects both the motor and the breaker. In summer, higher ambient temperatures mean the motor runs hotter and may draw slightly higher current. At the same time, a warm breaker panel trips at lower currents than a cool one. A pump that is marginally sized relative to the breaker can operate fine in winter but trip the breaker during summer heat. The correct solution is to either add shading to the pump motor and breaker panel, or upsize the breaker to provide adequate margin — with an electrician verifying this is appropriate for the motor's FLA.

I replaced the motor and the GFCI still trips — what now?

If a new motor still trips the GFCI, the fault is not in the motor. Check the wiring from the breaker to the junction box for insulation damage. Also verify the new motor is correctly wired for the supply voltage — a motor wired for 120V but receiving 240V will have immediate winding failure and cause a GFCI trip. If wiring is confirmed good, suspect VS drive leakage current — contact Hayward with your specific VS drive model number to get the recommended compatible GFCI breaker model.

How do I know if the GFCI breaker itself is bad?

Test the GFCI breaker with no load connected. Turn off the breaker, disconnect all load wiring, reset the breaker, and press the TEST button on the breaker face — it should trip. Press RESET — it should hold with no load connected. If the breaker trips without the TEST button being pressed and with no load wired, the breaker itself is defective and should be replaced. GFCI breakers have a finite service life and should be replaced every 10–15 years as part of routine maintenance.

The pump tripped the breaker and now there is a burning smell — what happened?

A burning smell from the motor area after a breaker trip indicates the motor windings were overheated or a winding short to ground produced heat. Do not restart the pump. Let the motor cool completely, then check the winding insulation resistance with a megohmmeter. Any reading less than 1 megohm between the winding leads and the motor frame indicates damaged insulation — the motor must be replaced. The breaker trip was the circuit doing its job by interrupting current to a failing motor.