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Preventive maintenance
Purpose
The purpose of the following instruction is to guide you through how to clean and maintain an A/C.
Description
The air conditioner cleaning and maintenance is the key to help the air conditioner improve the cooling
capacity, improve life time, higher energy saving, and better performance.
After the air conditioner start, depending on environmental conditions; climatic conditions; the number
of the compressor start/stop frequency; dust and air pollution, cleanliness of the cabinet and many
other factors, help determine the maintenance frequency. Normally, the period of preventive mainte-
nance should not surpass six months. In case of very bad air quality, the period of two months need
be considered.
Conditions of warranty:
The factory warranty is only valid if documented preventive maintenance has been carried out with
an interval of maximum 6 month
（
（
（
（
normally air quality location
）
）
）
）
or 2 month (very bad air quality
location). The documentation could be in form of a written log on the site, or a report from the com-
puter test program.
Several clean-up methods can be utilized.
Tools and materials:
1) Mechanical cleaning
Vacuum cleaner or compressed air
Soft bristle brush
Screwdriver
2) Liquid cleaning
CNHR-60 cleaning agent for coil’s fins/CNHR-60
Water
Screwdriver
Содержание DCU22-2000DH
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