How can I fix Simpson eziset 950?

My machine will not wash or spin. I set type of wash eg. Normal, set water height and cold wash. The machine fills to height but when it goes "click" to wash it doesn't do anything, except for counting down the timer . When I switched to Drain & Spin it drained ok but did not spin.
The previos load I did, the machine said it was unbalanced (it was not a large load), which I fixed and then it worked ok
Any ideas?