When the pump should start, the controller/VSD displays E08 and the motor doesn’t turn.
AQS Liquid Transfer2025-08-20T12:41:36+02:00Ensure that the motor turns freely by hand after the [...]
The controller/VSD displays E04
AQS Liquid Transfer2025-08-20T12:41:36+02:00Check to see if the motor or aluminium backside of [...]
The controller/VSD displays E03
AQS Liquid Transfer2025-08-20T12:41:36+02:00Examine the pressure transducer and the electrical cable between the [...]
The controller/VSD displays E01
AQS Liquid Transfer2025-08-20T12:41:36+02:00Check the power supply to the controller/VSD for low voltage [...]
No lights are illuminated on the controller/VSD and the pump doesn’t turn on.
AQS Liquid Transfer2025-08-20T12:41:36+02:00Examine the electrical cable, electrical connections and protection equipment between [...]
When the pump starts or runs, the circuit breaker trips
AQS Liquid Transfer2025-08-20T12:41:36+02:00Confirm that the circuit breaker rating is correct according to [...]
The pump continuously cycles on and off, with a delay of a few seconds or minutes in between each cycle.
AQS Liquid Transfer2025-08-20T12:41:37+02:00Check for leaks in the plumbing between the pump and [...]
The pump indicates “waterless” and does not turn on when a fixture is opened.
AQS Liquid Transfer2025-08-20T12:41:37+02:00Examine the water supply tank to see if it is [...]
When all fixtures are shut off, the pump does not turn off.
AQS Liquid Transfer2025-08-20T12:41:37+02:00Retest after closing the valve that is directly attached to [...]
