Pentair SuperFlo VS Temperature & Internal Faults
Several SuperFlo VS fault codes are triggered by UL 60730 self-diagnostic safety software or temperature protection circuits in the drive. These faults include temperature limits (04, 06, 08), DC bus voltage faults (09, 0A), and current-related faults (17, 16/ib, 02).
The first step for all of these faults is a hard power cycle. Many will clear after cycling power — if they persist, the drive may need replacement.
Fault Code Reference
| Fault Code | Description | Component |
|---|---|---|
| 04 | Absolute power module temperature limit exceeded | Drive inverter section |
| 06 | Absolute power factor correction (PFC) temperature limit exceeded | Drive PFC circuit |
| 08 | Absolute diode bridge temperature limit exceeded | Drive rectifier |
| 09 | DC bus over voltage detected | Drive DC bus |
| 0A / OA | DC bus under voltage detected | Drive DC bus |
| 17 | Phase current offset out of range | Drive current sensing |
| 16 / ib | Phase current imbalance detected | Drive current sensing |
| 02 | Absolute phase current limit exceeded | Drive output stage |
Step 1: Hard Power Cycle (All Faults)
- Turn off the circuit breaker to the pump
- Wait until all keypad LEDs have turned off — this ensures the capacitor bank has discharged (allow 60 seconds)
- Turn the breaker back on
- Restart the pump
- Monitor for recurrence — if the fault does not return, continue normal operation
Many of these faults are triggered by transient conditions (power surges, momentary overloads, or software self-test cycles) and will not recur after a power cycle.
Temperature Faults (04, 06, 08)
These faults mean a heat-sensitive component in the drive has exceeded its safe operating temperature.
Common Causes
- Poor ventilation: Equipment enclosure without airflow or pump in direct sun
- High ambient temperature: Equipment room temperature too high
- Debris blocking motor fan: Leaves, dust, or debris blocking airflow through the motor fins
- Loose wiring connections: Resistance at terminals generates heat
- Low voltage: Higher current draw under low voltage increases heat in drive components
Troubleshooting
- Clean back of pump — use compressed air to remove debris from motor fins and fan guard
- Ensure the equipment area has adequate airflow — remove obstructions from around the motor
- If pump is in an enclosure, verify there is ventilation — do not seal it completely
- Check all wiring connections for tightness and corrosion
- Verify supply voltage is within range (see Fault 0F guide)
DC Bus Faults (09, 0A)
Fault 09 — DC Bus Over Voltage
The DC bus inside the drive has exceeded its maximum voltage. Causes include:
- High utility voltage spike
- Back-driving: water continuing to flow through the pump after it stops (thermosiphon from solar heating, elevated spa draining back)
- Nearby equipment causing voltage spikes on the line
Solution for back-driving: Install a check valve on the discharge side of the pump to prevent reverse flow when the pump stops.
Fault 0A — DC Bus Under Voltage
Usually linked to low supply voltage — refer to the Fault 0F troubleshooting guide for diagnosis steps.
Current Sensing Faults (17, 16/ib, 02)
These faults are generated by the UL 60730 self-diagnostic software monitoring current sensing circuits:
- 17 (Phase current offset): Current sensing baseline is out of calibration range
- 16 / ib (Phase current imbalance): Unequal current between motor phases. The manual's fault table shows this as ib; on some units the 7-segment display renders this as 16.
- 02 (Phase current limit): Instantaneous current spike exceeded drive limits
These faults are often transient and clear after a power cycle. If recurring, they may indicate a motor winding issue or failing drive components.
When the Drive Needs Replacement
If a fault from this group persists after:
- Multiple hard power cycles
- Verifying ventilation and wiring
- Confirming supply voltage is in range
...then the drive board itself may have failed and needs replacement.
Replacement Parts
| Part | Part Number |
|---|---|
| Drive Cover | 353123 |
| Drive/Cover Kit | 353127 |
| Motor/Drive Assembly (complete) | 353132S |
Call Pentair Technical Service at (800) 831-7133 before ordering drive components — they can help confirm whether the drive or motor is at fault.