York HIDS006B21S Service Manual page 116

MAINTENANCE
(Cleaning Indoor Unit Heat Exchanger)
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 condensate pan.
10 Measure the condition of insulation of the condensate 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 Section 4.3.1, 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.
4-42
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 36
to 71 psi (2.5 to 5.0 kg/cm
fins and direct the nozzle in a straight line toward the
fins.
Nozzle
Spray
Pump
2
) so as not to crush the
Required Tool
* Water Tank
* Pump
* Washer
* Screwdriver
* Hexagon Wrench
* Screwdriver
SM-18001-rev.1