Pentair IntelliFlo Internal Error
The Internal Error alarm indicates the self-monitoring motor control software has encountered an error. This is typically a software or drive issue rather than a mechanical problem.
This alarm requires clearing before the pump will restart.
What Causes Internal Error?
Software Glitches
- Power fluctuations during operation
- Electrical noise interference
- Memory corruption
- Random software faults
Drive Hardware Issues
- Drive component failure
- Connection issues between drive and motor
- Overheating affecting drive electronics
- Age-related drive degradation
External Factors
- Lightning strikes nearby
- Power surges
- Electrical interference from other equipment
Troubleshooting Steps
Step 1: Clear the Alarm
- Press the Reset button on control panel
- Wait for pump to restart
- Monitor for recurrence
Step 2: Power Cycle
If alarm returns immediately:
- Turn off power at breaker
- Wait 30 seconds
- Turn power back on
- Monitor for alarm
Step 3: Check Drive Connections
- Turn off power at breaker
- Open drive cover
- Inspect ribbon cable between drive and keypad
- Check all internal connections
- Look for signs of moisture or corrosion
Step 4: View Alarm Log
Check the alarm history for patterns:
- Press Menu button
- Navigate to Settings
- Select Alarm Log
- Review recent alarms (stores up to 10)
When It's a One-Time Event
If the internal error clears and doesn't return:
- Likely caused by power fluctuation
- May have been electrical noise
- Continue normal operation
- Monitor during next few service visits
When to Contact Pentair
Call Pentair Technical Service at 1-800-831-7133 if:
- Internal error persists after reset
- Error occurs repeatedly
- Error returns after power cycling
- Drive shows physical damage
- Error occurs during specific operations
Drive Replacement
If drive replacement is needed:
| Part | Almond | Black |
|---|---|---|
| Drive Assembly (after 11/20) | 356971Z | 356991Z |
| Drive Cover Kit | 357527Z | 358527Z |
Protecting Against Future Errors
- Install surge protector on pump circuit
- Ensure proper grounding
- Keep drive clean and dry
- Maintain good ventilation
- Schedule regular maintenance inspections