Hi just had new dishwasher

Question

hi just had new dishwasher put in its a diplomat intergrated dishwasher aca9102, only used it once and started beeping towards the end of the cycle. thought it might be coz i didn't put salt in it, and had tablets instead of detergent so put salt in and detergent in but couldn't get rinse aid. started the program on normal wash but started beeping 10 beeps straight away and the first three lights out of 6 are flashing on the control panel. could it be coz theres no rinse aid in it? please someone help me