Hurlcon
Hurlcon 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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E1
The controller shows E1 and the pump will not start; this often occurs after incorrect wiring or a new installation.
Incorrect Wiring / Polarity Error
E2
Display shows E2 and pump stops or refuses to start, often after a storm or brownout.
Under/Over Voltage Protection
E3
Pump runs briefly then stops with E3 on the display.
Flow Sensor / Pressure Switch Fault (where fitted)
E4
E4 displayed and pump will not start; may be accompanied by a blank or flickering screen.
Keypad / User Interface Failure
E5
Pump display shows E5 and the unit shuts down shortly after starting.
Internal Temperature Sensor Fault
E6
E6 error appears randomly; pump may start and stop unexpectedly.
Internal Drive Communication / Firmware Error
F1
The pump will not start; the controller beeps and displays F1 immediately after pressing START.
Low/No Water Flow Protection Trip
F2
The pump stops shortly after starting and displays F2 on the Hurlcon controller.
Dry Run / Loss of Prime Protection
F3
The pump attempts to start, hums briefly, then stops and displays F3.
Overcurrent / Motor Overload Trip
F4
The pump stops during operation and displays F4, often on hot days or after running for several hours.
Motor Thermal Overload / Overtemperature
F5
The controller shows F5 and the pump will not start; this sometimes occurs after a power surge or lightning storm.
Controller–Motor Communication Fault
F6
The display shows F6 and the pump does not run; this may occur intermittently when starting.
Phase / Supply Voltage Error (Single-Phase Protection)
F7
The pump stops and F7 appears, often when switching between speed settings on a variable-speed Hurlcon pump.
Speed Selection / Internal Drive Fault
F8
The display shows F8 and the pump will not run; this is sometimes accompanied by a faint clicking sound from the control box.
Relay / Output Stage Failure
F9
The pump display shows F9 and the motor does not attempt to start.
Internal Motor Protection / Locked Rotor Detection
Hi
Display shows 'Hi' and pump may shut down or run noisily.
High Pressure / Overload Condition
Lo
Display alternates between speed setting and 'Lo'; pump runs at reduced output or stops.
Low Flow / Low Pressure Condition
Symptom
Pump emits a burning smell or visible smoke from the motor housing.
Motor Overheating / Insulation Breakdown
Symptom
Pump hums loudly but does not start; may trip the breaker after a few seconds.
Failed Start Capacitor / Stalled Rotor
Symptom
Pump runs but air bubbles are constantly visible at the pool return jets.
Minor Air Ingress on Suction Side
Symptom
Pump runs but makes a high-pitched whine, especially at certain speeds on a variable-speed Hurlcon pump.
Drive Frequency Noise / Resonance
Symptom
Pump runs but pressure gauge on filter reads much higher than normal.
High System Pressure
Symptom
Pump runs but pressure gauge on filter reads much lower than normal.
Low System Pressure / Low Flow
Symptom
Pump runs but there is no water movement; pump pot does not fill with water.
Loss of Prime / Airlocked Pump
Symptom
Pump starts and stops rapidly (short cycling) without user input.
Control Instability / Faulty Sensor or Relay
Symptom
Pump timer or controller does not start the pump at scheduled times, but pump runs in manual mode.
Controller Programming / Timer Fault
Symptom
Pump vibrates excessively, causing pipes to shake or rattle.
Imbalance / Misalignment
Symptom
Pump will not start at all, no hum, no click, and no display on Hurlcon controller.
No Power / Dead Pump
Symptom
The pump is unusually loud with a cavitating, gravelly sound and visible air in the pump lid.
Cavitation Due to Restriction or High Suction Lift
Symptom
The pump is very noisy, with a grinding or screeching sound coming from the motor end.
Worn Motor Bearings
Symptom
The pump loses prime after a few minutes of running and then sucks air.
Suction Air Leak / Cavitation
Symptom
The pump makes a rattling or clunking noise from the wet end, especially at startup.
Loose or Damaged Impeller / Debris in Volute
Symptom
The pump runs but overheats and shuts down after 10–30 minutes, then restarts when cooled.
Thermal Overload Cycling
Symptom
The pump runs but pool circulation is weak; return jets have low pressure.
Reduced Flow / Hydraulic Restriction
Symptom
The pump trips the circuit breaker or RCD immediately when turned on.
Electrical Short / Earth Leakage
Symptom
Water is leaking from around the clear pump lid when the pump is running.
Leaking Pump Lid Seal
Symptom
Water is leaking from the join between the pump housing and motor, or from under the motor.
Failed Mechanical Seal
Symptom
Water is leaking from the threaded unions or pipe connections on the pump.
Leaking Unions / Threaded Fittings
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
The controller shows E1 and the pump will not start; this often occurs after incorrect wiring or a new installation.
|
Incorrect Wiring / Polarity Error | View Details |
| E2 |
Display shows E2 and pump stops or refuses to start, often after a storm or brownout.
|
Under/Over Voltage Protection | View Details |
| E3 |
Pump runs briefly then stops with E3 on the display.
|
Flow Sensor / Pressure Switch Fault (where fitted) | View Details |
| E4 |
E4 displayed and pump will not start; may be accompanied by a blank or flickering screen.
|
Keypad / User Interface Failure | View Details |
| E5 |
Pump display shows E5 and the unit shuts down shortly after starting.
|
Internal Temperature Sensor Fault | View Details |
| E6 |
E6 error appears randomly; pump may start and stop unexpectedly.
|
Internal Drive Communication / Firmware Error | View Details |
| F1 |
The pump will not start; the controller beeps and displays F1 immediately after pressing START.
|
Low/No Water Flow Protection Trip | View Details |
| F2 |
The pump stops shortly after starting and displays F2 on the Hurlcon controller.
|
Dry Run / Loss of Prime Protection | View Details |
| F3 |
The pump attempts to start, hums briefly, then stops and displays F3.
|
Overcurrent / Motor Overload Trip | View Details |
| F4 |
The pump stops during operation and displays F4, often on hot days or after running for several hours.
|
Motor Thermal Overload / Overtemperature | View Details |
| F5 |
The controller shows F5 and the pump will not start; this sometimes occurs after a power surge or lightning storm.
|
Controller–Motor Communication Fault | View Details |
| F6 |
The display shows F6 and the pump does not run; this may occur intermittently when starting.
|
Phase / Supply Voltage Error (Single-Phase Protection) | View Details |
| F7 |
The pump stops and F7 appears, often when switching between speed settings on a variable-speed Hurlcon pump.
|
Speed Selection / Internal Drive Fault | View Details |
| F8 |
The display shows F8 and the pump will not run; this is sometimes accompanied by a faint clicking sound from the control box.
|
Relay / Output Stage Failure | View Details |
| F9 |
The pump display shows F9 and the motor does not attempt to start.
|
Internal Motor Protection / Locked Rotor Detection | View Details |
| Hi |
Display shows 'Hi' and pump may shut down or run noisily.
|
High Pressure / Overload Condition | View Details |
| Lo |
Display alternates between speed setting and 'Lo'; pump runs at reduced output or stops.
|
Low Flow / Low Pressure Condition | View Details |
| – |
Pump emits a burning smell or visible smoke from the motor housing.
|
Motor Overheating / Insulation Breakdown | View Details |
| – |
Pump hums loudly but does not start; may trip the breaker after a few seconds.
|
Failed Start Capacitor / Stalled Rotor | View Details |
| – |
Pump runs but air bubbles are constantly visible at the pool return jets.
|
Minor Air Ingress on Suction Side | View Details |
| – |
Pump runs but makes a high-pitched whine, especially at certain speeds on a variable-speed Hurlcon pump.
|
Drive Frequency Noise / Resonance | View Details |
| – |
Pump runs but pressure gauge on filter reads much higher than normal.
|
High System Pressure | View Details |
| – |
Pump runs but pressure gauge on filter reads much lower than normal.
|
Low System Pressure / Low Flow | View Details |
| – |
Pump runs but there is no water movement; pump pot does not fill with water.
|
Loss of Prime / Airlocked Pump | View Details |
| – |
Pump starts and stops rapidly (short cycling) without user input.
|
Control Instability / Faulty Sensor or Relay | View Details |
| – |
Pump timer or controller does not start the pump at scheduled times, but pump runs in manual mode.
|
Controller Programming / Timer Fault | View Details |
| – |
Pump vibrates excessively, causing pipes to shake or rattle.
|
Imbalance / Misalignment | View Details |
| – |
Pump will not start at all, no hum, no click, and no display on Hurlcon controller.
|
No Power / Dead Pump | View Details |
| – |
The pump is unusually loud with a cavitating, gravelly sound and visible air in the pump lid.
|
Cavitation Due to Restriction or High Suction Lift | View Details |
| – |
The pump is very noisy, with a grinding or screeching sound coming from the motor end.
|
Worn Motor Bearings | View Details |
| – |
The pump loses prime after a few minutes of running and then sucks air.
|
Suction Air Leak / Cavitation | View Details |
| – |
The pump makes a rattling or clunking noise from the wet end, especially at startup.
|
Loose or Damaged Impeller / Debris in Volute | View Details |
| – |
The pump runs but overheats and shuts down after 10–30 minutes, then restarts when cooled.
|
Thermal Overload Cycling | View Details |
| – |
The pump runs but pool circulation is weak; return jets have low pressure.
|
Reduced Flow / Hydraulic Restriction | View Details |
| – |
The pump trips the circuit breaker or RCD immediately when turned on.
|
Electrical Short / Earth Leakage | View Details |
| – |
Water is leaking from around the clear pump lid when the pump is running.
|
Leaking Pump Lid Seal | View Details |
| – |
Water is leaking from the join between the pump housing and motor, or from under the motor.
|
Failed Mechanical Seal | View Details |
| – |
Water is leaking from the threaded unions or pipe connections on the pump.
|
Leaking Unions / Threaded Fittings | View Details |
No matching codes found
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