Hitachi RPI-0.8FSG1 Service Manual page 266

SERVICING
(2.11 Cleaning Indoor Unit Heat Exchanger)
(8) Cleaning with Clean Water
Insert the spray nozzle through the hole of the cleaning water collector.
Operate the pump and clean the fins with clean water. Adjust the water pump pressure so as not to
damage the fins.
NOTES:
1. If the cleaning water remains, fins will be
corroded.
2. Adjust the pressure of the pump at 2.5 to
5.0 kg/cm
(9) Attach the fan assembly and drain pan after cleaning is completed and dropping of cleaning water is
stopped.
(10) Check the insulation of drain-up pump by megohm-meter. Check to ensure that the insulation is
greater than 1 MΩ when 500V is applied.
(11) Connect the wiring as it was. Mount the air
distribution chamber and optional air panel.
(12) Neutralization Treatment after Cleaning
The cleaning agent specified in the item 2.11.1 is of the neutral type. However, the cleaning water
after use may be not neutral. Collect all cleaning water and make necessary neutralization treatment
for the cleaning water.
2-126
TURN OFF all power source switches.
Hose
Bucket
2 so as not to damage fins.
Tool Clean Water, Pump, Spray
Nozzle
Spray
Pump
Tool Phillips Screwdriver, Hexagon Wrench
Tool Phillips Screwdriver, Megohm-meter