The manual can be found here...
http://www.miele-professional.co.kr/gb/assets/GB_OI_G7856.pdf
Of the lights you mention - 9 in a vertical column - the first 5 are programme sequence indicators - then in order going downwards - Check water inlet/outlet - Add salt - Add rinse agent - Add liquid detergent - and the very bottom light is for the Service Engineer.
Looks to me it needs liquid cleaning agent.
I strongly suggest a service contract if you're in a comercial setting.
Was this quick enough for you 13:00 BST ?
Good Luck...
May 2016