Hitachi RPI-0.8FSG1 Service Manual page 259

Step
8 Cleaning with Clean Water
9 Make sure that there are no drops of water left after cleaning the fins
and reassemble the fan assembly and the drain pan.
10 Measure the condition of insulation of the drain pump with a
megohm-meter tester.
(Check to ensure that the resistance is bigger than 1 MΩ at 500V.)
11 Connect the electrical wiring as it was and attach the removed parts.
12 Neutralization Treatment after Cleaning
The cleaning agent specified in the item 2.11.1, is of neutral type.
However, the cleaning water after cleaning may be not neutral due to
dust or other foreign particles. Collect all cleaning water and make
necessary neutralization for the cleaning water.
Procedure
Hose
Bucket
Insert the nozzle into the hole of the cleaning
water collector. Operate the pump, wash
the dust off on the fins with clean water
thoroughly. If the cleaning agent is left on
the fins, it may cause corrosion.
Adjust the pressure of the spray at
approximately 2.5 to 5.0 kg/cm
to crush the fins and direct the nozzle in a
straight line toward the fins.
(2.11 Cleaning Indoor Unit Heat Exchanger)
* Water Tank
* Pump
* Washer
Nozzle
Spray
Pump
2
so as not
* Screwdriver
* Hexagon Wrench
* Screwdriver
SERVICING
Required Tool
2-119