Hitachi RAS-5HVRNM1E Service Manual page 59

3 Piping work and
refrigerant charge
Checking the unit without the drain-up mechanism
1 Pour approximately 1.8 litres of water into the drain pan.
2 Make sure that the water flows smoothly and that no water leakage occurs. If you cannot find water at the end of the
drain pipe, once again pour approximately 1.8 litres of water into the drain pan.
Checking the unit with the drain-up mechanism and the float switch
1 Turn the power supply on.
2 Pour approximately 1.8 litres of water into the drain pan. Then, the float switch will be activated. Next, the drain pump
will start working automatically.
3 Make sure that the water flows smoothly and that no water leakage occurs. If you cannot find water at the end of the
drain pipe, pour again approximately 1.8 litres of water into the drain pan.
4 Turn the power supply off.
N O T E
Pay attention to the insulation material thickness when the left-side piping is installed. If the insulation material is
too thick, you will not be able to install the piping in the unit.
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SMGB0060 rev. 1- 12/2010
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