Alarm 005
Pentair
Internal Drive Fault
IntelliFlo3 VSF or similar Pentair pump shows “Alarm 005” and will not start.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Corrupted firmware, Failed power supply section, Damaged control board from surge, Internal communication failure between control and power stage
How to Fix / Troubleshooting
Safety first: Disconnect power before removing any covers.
- Step 1 – Power cycle: Turn off the breaker for 5 minutes, then restore power and attempt to start the pump.
- Step 2 – Check for moisture: Inspect the drive housing for signs of water ingress or condensation. If present, the drive is likely compromised.
- Step 3 – Firmware update (if supported): Some newer Pentair pumps allow firmware updates via service tools; this must be done by an authorized technician.
- Step 4 – Replace drive: Persistent Alarm 005 generally indicates a non‑repairable internal fault. Replace the drive module or complete motor/drive assembly.
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Repair Difficulty
Professional Required
5/5
Required Part
IntelliFlo3 Drive Module
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