Hitachi RCI Service Manual page 53

2 Unit installation
Fit the false ceiling panels along the unit.
Continue for all installation types
2
Check that the condensate discharge system in the indoor unit
works correctly. To do so, check the level of the drain pan using a
spirit level or a clear flexible pipe full of water. The rear of the unit
where the drain hose is located must be around 3 mm lower than
the front side.
Secure the drain hose with the clamp and adhesive supplied.
41
SMGB0063 rev. 1 - 10/2010