A pump apparatus for water management comprising: at least one inlet ; at least one outlet ; a pump housing defining a pressure chamber in fluid communication with the at least one inlet and the outlet ; and a user interface associated with the pump apparatus , the user interface comprising: a display unit configured to display an error message associated with one or more operational parameter of the pump apparatus ; and a plurality of input means configured to receive a user input, characterised in that the display unit is configured to display at least one error remedy instruction, and the plurality of input means is configured to allow a user to select the at least one error remedy instruction, and further comprising a diagnostic unit , and one or more sensors configured to monitor the one or more operational parameters of the pump apparatus , the diagnostic unit is operatively connected to the sensors , the display unit and the input means , the diagnostic unit is configured to: receive signals indicative of the operational parameters of the pump apparatus from the sensors ; identify at least one fault in the pump apparatus based on the received signals; execute an error mode ( E ) when the fault is identified to stop an operation of the pump apparatus ; and selectively execute a reset mode based on the user input to exit from the error mode ( E ), wherein, based on the user input, the diagnostic unit is configured to execute an error remedy mode ( R ), during the error remedy mode ( R ) the error remedy instruction is displayed on the display unit , and wherein the diagnostic unit comprises a memory configured to set a first error status flag ( F1 ) in an active state to continuously execute the error remedy mode ( R ). at least one inlet ; at least one outlet ; a pump housing defining a pressure chamber in fluid communication with the at least one inlet and the outlet ; and a user interface associated with the pump apparatus , the user interface comprising: a display unit configured to display an error message associated with one or more operational parameter of the pump apparatus ; and a plurality of input means configured to receive a user input, a display unit configured to display an error message associated with one or more operational parameter of the pump apparatus ; and a plurality of input means configured to receive a user input, characterised in that the display unit is configured to display at least one error remedy instruction, and the plurality of input means is configured to allow a user to select the at least one error remedy instruction, and further comprising a diagnostic unit , and one or more sensors configured to monitor the one or more operational parameters of the pump apparatus , the diagnostic unit is operatively connected to the sensors , the display unit and the input means , the diagnostic unit is configured to: receive signals indicative of the operational parameters of the pump apparatus from the sensors ; identify at least one fault in the pump apparatus based on the received signals; execute an error mode ( E ) when the fault is identified to stop an operation of the pump apparatus ; and selectively execute a reset mode based on the user input to exit from the error mode ( E ), receive signals indicative of the operational parameters of the pump apparatus from the sensors ; identify at least one fault in the pump apparatus based on the received signals; execute an error mode ( E ) when the fault is identified to stop an operation of the pump apparatus ; and selectively execute a reset mode based on the user input to exit from the error mode ( E ), <EOS>