AstralPool
AstralPool 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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CF
Display shows 'CF' or 'CLn FIL' reminder; pump may continue running but indicates a filter clean is required.
Filter Maintenance Reminder / High Differential Pressure
dE
Display shows 'dE' or 'dry' and the pump stops shortly after starting.
Dry-Run Protection Activated
ERR1
Pump will not start, control panel beeps and displays ERR1 immediately after pressing START.
Low Voltage / Undervoltage Protection
ERR2
Pump attempts to start, hums briefly, then stops and displays ERR2 on the AstralPool controller.
Overcurrent / Locked Rotor Protection
ERR3
AstralPool variable-speed pump stops during operation and displays ERR3, often after running for some time.
Overtemperature / Thermal Protection Trip
ERR4
Pump display shows ERR4 and will not start; sometimes appears after a power surge or lightning storm.
Internal Drive / Inverter Fault
ERR5
AstralPool pump display shows ERR5 and the motor will not run, or runs briefly then stops.
Phase Loss / Phase Imbalance (for 3‑phase or inverter-driven models)
ERR6
Pump display shows ERR6 and the unit will not start; sometimes accompanied by a faint click from inside the control housing.
Relay / Contactor Fault or Start Circuit Failure
ERR7
AstralPool variable-speed pump shows ERR7 and cannot be controlled from the keypad or external automation.
Communication Error Between Keypad and Main Control Board
ERR8
Pump display shows ERR8 and the motor will not run; often occurs after the pump has been flooded or exposed to heavy rain.
Ground Fault / Earth Leakage Detected
ERR9
AstralPool pump shows ERR9 and stops; may occur intermittently when starting or changing speeds.
Speed Feedback / Hall Sensor Error (on some variable-speed models)
HI
Display shows 'HI' and the pump shuts down or refuses to start at higher speeds.
High Pressure / Overload Protection
LO
Display alternates between speed setting and 'LO'; pump may run at reduced speed or stop intermittently.
Low Flow / Low Pressure Protection
Pr
Display shows 'Pr' and pump will not start until priming completes; sometimes stuck in priming mode and times out.
Priming Failure Detected
rS
Display shows 'rS' or 'rSt' and pump does not follow programmed schedule.
Real-Time Clock / Scheduling Error
Symptom
Buttons on the AstralPool pump keypad do not respond or respond intermittently.
Keypad Switch Failure
Symptom
Pump display is blank or unreadable, but the motor still runs when controlled by external automation.
Display / Keypad Failure
Symptom
Pump emits a burning smell during operation, even though it still runs.
Overheating Motor or Electrical Connection
Symptom
Pump housing or unions show visible cracks or deformation.
Pump Casing / Union Body Damage
Symptom
Pump hums loudly but does not start; may trip breaker after a few seconds.
Stalled Rotor / Start Failure
Symptom
Pump is excessively hot to touch but still running; plastic parts near the motor feel warm.
Overheating Motor (Pre-Overload)
Symptom
Pump is leaking water between the pump housing and the motor (at the join).
Mechanical Shaft Seal Failure
Symptom
Pump is running but makes a high-pitched whine or screeching noise.
Bearing or Cavitation Noise
Symptom
Pump is running but makes a loud grinding or rumbling noise from the motor end.
Worn Motor Bearings
Symptom
Pump is very noisy and vibrates; pipes rattle when the pump is running.
Excessive Vibration / Misalignment
Symptom
Pump loses prime and fills with air shortly after starting; pump basket does not stay full of water.
Suction Air Leak / Loss of Prime
Symptom
Pump performance has gradually decreased over months; lower flow and higher filter pressure than when new.
Impeller Wear / Internal Scaling
Symptom
Pump runs but occasionally stops and restarts on its own without user input.
Intermittent Power or Control Fault
Symptom
Pump runs but there are large amounts of air bubbles visible in the pump lid and at the pool return jets.
Suction Air Leak / Entrained Air
Symptom
Pump runs but there is very low flow at the pool returns; weak jets and poor skimming.
Hydraulic Restriction / Low Flow Condition
Symptom
Pump runs but water appears cloudy or dirty despite normal run times.
Inadequate Filtration / Undersized or Misconfigured Pump Operation
Symptom
Pump runs but water flow surges up and down; jets alternate between strong and weak.
Intermittent Air Ingress / Partial Blockage
Symptom
Pump speed fluctuates on a variable-speed AstralPool pump even though a constant speed is selected.
Unstable Inverter Control / Sensor Feedback Issue
Symptom
Pump starts and then stops after a few minutes; motor feels very hot to the touch.
Thermal Overload Trip
Symptom
Pump trips the circuit breaker or RCD immediately when turned on.
Electrical Short or Earth Leakage
Symptom
Pump will not hold prime overnight; in the morning the pump basket is empty and pump must be re-primed.
Suction Side Air Ingress / Check Valve Failure
Symptom
Pump will not start at all; no display, no noise, completely dead.
No Power / Dead Pump
Symptom
Water leaking from around the clear pump lid when the pump is running.
Lid O-Ring Seal Failure
Symptom
Water leaking from the union connections on the suction or discharge side of the pump.
Union Seal / O-Ring Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CF |
Display shows 'CF' or 'CLn FIL' reminder; pump may continue running but indicates a filter clean is required.
|
Filter Maintenance Reminder / High Differential Pressure | View Details |
| dE |
Display shows 'dE' or 'dry' and the pump stops shortly after starting.
|
Dry-Run Protection Activated | View Details |
| ERR1 |
Pump will not start, control panel beeps and displays ERR1 immediately after pressing START.
|
Low Voltage / Undervoltage Protection | View Details |
| ERR2 |
Pump attempts to start, hums briefly, then stops and displays ERR2 on the AstralPool controller.
|
Overcurrent / Locked Rotor Protection | View Details |
| ERR3 |
AstralPool variable-speed pump stops during operation and displays ERR3, often after running for some time.
|
Overtemperature / Thermal Protection Trip | View Details |
| ERR4 |
Pump display shows ERR4 and will not start; sometimes appears after a power surge or lightning storm.
|
Internal Drive / Inverter Fault | View Details |
| ERR5 |
AstralPool pump display shows ERR5 and the motor will not run, or runs briefly then stops.
|
Phase Loss / Phase Imbalance (for 3‑phase or inverter-driven models) | View Details |
| ERR6 |
Pump display shows ERR6 and the unit will not start; sometimes accompanied by a faint click from inside the control housing.
|
Relay / Contactor Fault or Start Circuit Failure | View Details |
| ERR7 |
AstralPool variable-speed pump shows ERR7 and cannot be controlled from the keypad or external automation.
|
Communication Error Between Keypad and Main Control Board | View Details |
| ERR8 |
Pump display shows ERR8 and the motor will not run; often occurs after the pump has been flooded or exposed to heavy rain.
|
Ground Fault / Earth Leakage Detected | View Details |
| ERR9 |
AstralPool pump shows ERR9 and stops; may occur intermittently when starting or changing speeds.
|
Speed Feedback / Hall Sensor Error (on some variable-speed models) | View Details |
| HI |
Display shows 'HI' and the pump shuts down or refuses to start at higher speeds.
|
High Pressure / Overload Protection | View Details |
| LO |
Display alternates between speed setting and 'LO'; pump may run at reduced speed or stop intermittently.
|
Low Flow / Low Pressure Protection | View Details |
| Pr |
Display shows 'Pr' and pump will not start until priming completes; sometimes stuck in priming mode and times out.
|
Priming Failure Detected | View Details |
| rS |
Display shows 'rS' or 'rSt' and pump does not follow programmed schedule.
|
Real-Time Clock / Scheduling Error | View Details |
| – |
Buttons on the AstralPool pump keypad do not respond or respond intermittently.
|
Keypad Switch Failure | View Details |
| – |
Pump display is blank or unreadable, but the motor still runs when controlled by external automation.
|
Display / Keypad Failure | View Details |
| – |
Pump emits a burning smell during operation, even though it still runs.
|
Overheating Motor or Electrical Connection | View Details |
| – |
Pump housing or unions show visible cracks or deformation.
|
Pump Casing / Union Body Damage | View Details |
| – |
Pump hums loudly but does not start; may trip breaker after a few seconds.
|
Stalled Rotor / Start Failure | View Details |
| – |
Pump is excessively hot to touch but still running; plastic parts near the motor feel warm.
|
Overheating Motor (Pre-Overload) | View Details |
| – |
Pump is leaking water between the pump housing and the motor (at the join).
|
Mechanical Shaft Seal Failure | View Details |
| – |
Pump is running but makes a high-pitched whine or screeching noise.
|
Bearing or Cavitation Noise | View Details |
| – |
Pump is running but makes a loud grinding or rumbling noise from the motor end.
|
Worn Motor Bearings | View Details |
| – |
Pump is very noisy and vibrates; pipes rattle when the pump is running.
|
Excessive Vibration / Misalignment | View Details |
| – |
Pump loses prime and fills with air shortly after starting; pump basket does not stay full of water.
|
Suction Air Leak / Loss of Prime | View Details |
| – |
Pump performance has gradually decreased over months; lower flow and higher filter pressure than when new.
|
Impeller Wear / Internal Scaling | View Details |
| – |
Pump runs but occasionally stops and restarts on its own without user input.
|
Intermittent Power or Control Fault | View Details |
| – |
Pump runs but there are large amounts of air bubbles visible in the pump lid and at the pool return jets.
|
Suction Air Leak / Entrained Air | View Details |
| – |
Pump runs but there is very low flow at the pool returns; weak jets and poor skimming.
|
Hydraulic Restriction / Low Flow Condition | View Details |
| – |
Pump runs but water appears cloudy or dirty despite normal run times.
|
Inadequate Filtration / Undersized or Misconfigured Pump Operation | View Details |
| – |
Pump runs but water flow surges up and down; jets alternate between strong and weak.
|
Intermittent Air Ingress / Partial Blockage | View Details |
| – |
Pump speed fluctuates on a variable-speed AstralPool pump even though a constant speed is selected.
|
Unstable Inverter Control / Sensor Feedback Issue | View Details |
| – |
Pump starts and then stops after a few minutes; motor feels very hot to the touch.
|
Thermal Overload Trip | View Details |
| – |
Pump trips the circuit breaker or RCD immediately when turned on.
|
Electrical Short or Earth Leakage | View Details |
| – |
Pump will not hold prime overnight; in the morning the pump basket is empty and pump must be re-primed.
|
Suction Side Air Ingress / Check Valve Failure | View Details |
| – |
Pump will not start at all; no display, no noise, completely dead.
|
No Power / Dead Pump | View Details |
| – |
Water leaking from around the clear pump lid when the pump is running.
|
Lid O-Ring Seal Failure | View Details |
| – |
Water leaking from the union connections on the suction or discharge side of the pump.
|
Union Seal / O-Ring Leak | View Details |
No matching codes found
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