Hi All,

We have a large multi-city install with 3 x 2 banks of units on the roof, about 90 internal units split over 50 offices and 3 floors controlled via 3 x g50 controllers.

We currently have no heating and can not get hold of out engineers!

The local controllers in the offices are giving a variety of codes including 7100 and 7102. The G50's are showing no errors!

Can someone point me in the right direction to get things running again?

Thanks.