Aquaflow
Aquaflow Pool Pumps Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Pump will not start, display shows E01 immediately after power-on
Supply Undervoltage Protection
E02
Pump attempts to start then shuts down within a few seconds, display shows E02
Overcurrent / Locked Rotor Protection
E03
Pump stops during operation and displays E03 after running for several minutes
Thermal Overload / Overheating Protection
E04
Display shows E04 and pump will not start, sometimes accompanied by a humming noise
Phase Loss / Single-Phase Operation Detected (for 3‑phase or inverter models)
E05
Pump display shows E05 and motor does not run, often after a storm or power surge
Internal Drive Fault / IGBT Protection
E06
Pump display shows E06 and motor speed cannot be adjusted or pump will not start
Motor Hall Sensor / Speed Feedback Error
E07
Display shows E07 and pump stops or will not start, often after wiring changes
Incorrect Wiring / Polarity Error
E08
Pump display shows E08 and unit will not run, often in damp installations
Ground Fault / Leakage Current Detected
E09
Display shows E09 and pump speed drops or stops unexpectedly
Underload / Dry-Run Protection
E10
Pump display shows E10 and unit will not respond to keypad inputs
Keypad / User Interface Communication Error
E11
Display shows E11 and pump cannot be controlled from external automation system
External Communication / RS-485 Error
E12
Pump display shows E12 and unit runs only at a fixed speed or shuts down
Internal EEPROM / Parameter Memory Error
E13
Display shows E13 and pump will not start, often in cold weather
Temperature Sensor Fault
E14
Pump display shows E14 and unit cycles on and off rapidly
Relay / Contactor Fault
E15
Display shows E15 and pump runs at reduced power or not at all
Capacitor / Start Circuit Error (single-phase models)
E16
Display shows E16 and pump stops when filter pressure is high
Flow / Pressure Protection Triggered
E17
Display shows E17 and pump will not start after being idle for months
Stall Detection / Rotor Blocked
E18
Display shows E18 and pump runs only at minimum speed regardless of settings
Speed Limit / Derate Mode Activated
E19
Display shows E19 and pump stops when attempting high speed
Overvoltage Protection
E20
Display shows E20 and pump will not start after a brownout or flickering power
Internal Self-Test / Watchdog Failure
Symptom
Pump display is blank but power is present at the terminals
Failed Control Panel or Low-Voltage Power Supply
Symptom
Pump emits a burning smell during operation
Overheating Electrical Components
Symptom
Pump housing cracks or leaks at the volute or around fittings
Cracked Pump Housing
Symptom
Pump hums but does not start, then trips the breaker
Failed Start Capacitor or Seized Motor
Symptom
Pump is leaking water between the pump housing and the motor
Failed Mechanical Seal
Symptom
Pump is noisy with a rattling or grinding sound from the wet end, especially when starting
Impeller Damage or Debris
Symptom
Pump is unusually hot to the touch but still running
Continuous Overload Operation
Symptom
Pump is very noisy, with a loud grinding or screeching sound from the motor area
Worn Motor Bearings
Symptom
Pump makes a cavitation noise (loud, gravelly, with surging flow)
Cavitation Due to Low Suction Pressure
Symptom
Pump runs but filter pressure is very high and flow at returns is weak
Restricted Discharge / Dirty Filter
Symptom
Pump runs but flow is weak and filter pressure is low
Suction Restriction or Air Ingress
Symptom
Pump runs but there are large amounts of air bubbles in the pool returns
Suction-Side Air Leak
Symptom
Pump runs but there is no water flow to the pool returns
Loss of Prime / Airlocked Pump
Symptom
Pump runs but water appears cloudy and circulation seems poor
Insufficient Run Time or Flow Rate
Symptom
Pump runs intermittently, starting and stopping on its own without error code
Overheating or Loose Electrical Connection
Symptom
Pump starts normally but shuts off after a few minutes without any error code
Thermal Overload Trip (Non-Reporting)
Symptom
Pump trips the circuit breaker immediately when turned on
Electrical Short Circuit
Symptom
Pump vibrates excessively and causes pipes to shake
Imbalance or Misalignment
Symptom
Pump will not start at scheduled times but runs manually
Timer / Programming Issue
Symptom
Water is leaking from the clear pump lid area
Damaged or Dirty Pump Lid O-Ring
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Pump will not start, display shows E01 immediately after power-on
|
Supply Undervoltage Protection | View Details |
| E02 |
Pump attempts to start then shuts down within a few seconds, display shows E02
|
Overcurrent / Locked Rotor Protection | View Details |
| E03 |
Pump stops during operation and displays E03 after running for several minutes
|
Thermal Overload / Overheating Protection | View Details |
| E04 |
Display shows E04 and pump will not start, sometimes accompanied by a humming noise
|
Phase Loss / Single-Phase Operation Detected (for 3‑phase or inverter models) | View Details |
| E05 |
Pump display shows E05 and motor does not run, often after a storm or power surge
|
Internal Drive Fault / IGBT Protection | View Details |
| E06 |
Pump display shows E06 and motor speed cannot be adjusted or pump will not start
|
Motor Hall Sensor / Speed Feedback Error | View Details |
| E07 |
Display shows E07 and pump stops or will not start, often after wiring changes
|
Incorrect Wiring / Polarity Error | View Details |
| E08 |
Pump display shows E08 and unit will not run, often in damp installations
|
Ground Fault / Leakage Current Detected | View Details |
| E09 |
Display shows E09 and pump speed drops or stops unexpectedly
|
Underload / Dry-Run Protection | View Details |
| E10 |
Pump display shows E10 and unit will not respond to keypad inputs
|
Keypad / User Interface Communication Error | View Details |
| E11 |
Display shows E11 and pump cannot be controlled from external automation system
|
External Communication / RS-485 Error | View Details |
| E12 |
Pump display shows E12 and unit runs only at a fixed speed or shuts down
|
Internal EEPROM / Parameter Memory Error | View Details |
| E13 |
Display shows E13 and pump will not start, often in cold weather
|
Temperature Sensor Fault | View Details |
| E14 |
Pump display shows E14 and unit cycles on and off rapidly
|
Relay / Contactor Fault | View Details |
| E15 |
Display shows E15 and pump runs at reduced power or not at all
|
Capacitor / Start Circuit Error (single-phase models) | View Details |
| E16 |
Display shows E16 and pump stops when filter pressure is high
|
Flow / Pressure Protection Triggered | View Details |
| E17 |
Display shows E17 and pump will not start after being idle for months
|
Stall Detection / Rotor Blocked | View Details |
| E18 |
Display shows E18 and pump runs only at minimum speed regardless of settings
|
Speed Limit / Derate Mode Activated | View Details |
| E19 |
Display shows E19 and pump stops when attempting high speed
|
Overvoltage Protection | View Details |
| E20 |
Display shows E20 and pump will not start after a brownout or flickering power
|
Internal Self-Test / Watchdog Failure | View Details |
| – |
Pump display is blank but power is present at the terminals
|
Failed Control Panel or Low-Voltage Power Supply | View Details |
| – |
Pump emits a burning smell during operation
|
Overheating Electrical Components | View Details |
| – |
Pump housing cracks or leaks at the volute or around fittings
|
Cracked Pump Housing | View Details |
| – |
Pump hums but does not start, then trips the breaker
|
Failed Start Capacitor or Seized Motor | View Details |
| – |
Pump is leaking water between the pump housing and the motor
|
Failed Mechanical Seal | View Details |
| – |
Pump is noisy with a rattling or grinding sound from the wet end, especially when starting
|
Impeller Damage or Debris | View Details |
| – |
Pump is unusually hot to the touch but still running
|
Continuous Overload Operation | View Details |
| – |
Pump is very noisy, with a loud grinding or screeching sound from the motor area
|
Worn Motor Bearings | View Details |
| – |
Pump makes a cavitation noise (loud, gravelly, with surging flow)
|
Cavitation Due to Low Suction Pressure | View Details |
| – |
Pump runs but filter pressure is very high and flow at returns is weak
|
Restricted Discharge / Dirty Filter | View Details |
| – |
Pump runs but flow is weak and filter pressure is low
|
Suction Restriction or Air Ingress | View Details |
| – |
Pump runs but there are large amounts of air bubbles in the pool returns
|
Suction-Side Air Leak | View Details |
| – |
Pump runs but there is no water flow to the pool returns
|
Loss of Prime / Airlocked Pump | View Details |
| – |
Pump runs but water appears cloudy and circulation seems poor
|
Insufficient Run Time or Flow Rate | View Details |
| – |
Pump runs intermittently, starting and stopping on its own without error code
|
Overheating or Loose Electrical Connection | View Details |
| – |
Pump starts normally but shuts off after a few minutes without any error code
|
Thermal Overload Trip (Non-Reporting) | View Details |
| – |
Pump trips the circuit breaker immediately when turned on
|
Electrical Short Circuit | View Details |
| – |
Pump vibrates excessively and causes pipes to shake
|
Imbalance or Misalignment | View Details |
| – |
Pump will not start at scheduled times but runs manually
|
Timer / Programming Issue | View Details |
| – |
Water is leaking from the clear pump lid area
|
Damaged or Dirty Pump Lid O-Ring | View Details |
No matching codes found
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