AUX air conditioner service manual
17
Table1-7 the noise to the sense of the human beings:
20dB Silence Broadcasting room with nobody in
30dB Very quiet The odium with nobody in
40dB Almost insensible to the noise Inside the quiet library
50dB Feel the noise The quiet hotel hall
60dB quite sensible to the noise The ordinary dining room of the plant
⒂ 3C Certification:
It’s the abbreviation of China Compulsory Certification, which is aiming to test and evaluate the
electrical safety (and structural safety etc.), the conformity of the electromagnetism compatibility of
the products. E.g. the combination of the former Great Wall certification pluses the test of the
electromagnetism compatibility. The electromagnetism includes EMS (the sensitivity of the
electromagnetism e.g. the resistance performance against the interference of the electromagnetism)
and EMI(interference of the electromagnetism); the performance of the EMI mainly includes: 1. the
interference to the electrical net; 2 the radial interference through the connecting cable of the electric
power source.
⒃CE certificate
This certificate, pushed by the EU, is a safety and quality symbol for certifying the products are in
compliance with the specified basic requirement of EU; and used for insure the consumers that the
products with this symbol are in conformity with the basic requirement of safety, health and
environment. CE is the abbreviation of the EU in Latin language, which also express the meaning of
conformity to the requirement of EU.
⒄Environment symbol certification: The materials applied in the production and the recycled are
given the conception of environment protection (such as the degradation time’s difference of the form
packaging and paper packaging and their recycle possibility).
⒅ISO9001 International Quality System Certification:
The evaluation and validation carried out by the third independent attestation agent or institute for
verifying the quality system of the plant is in conformity with the ISO 9000 standard, which includes
all aspects of the whole process, such as the product design, manufacture, test status, statistic
engineering, organization constructions etc., and also require the manufacturer to be in compliance
with the requirement of the standard and retain.
⒆ VDE:
A testing and certifying symbol, which can be obtained from the IEC System for Conformity Testing
and Certification of Electrical Equipment(CB).The test result of CB is approbated between 43 member
countries, and is also accepted by many other non-CB system countries.
Section three the basic structure of the air-conditioner
Air-conditioner is the kind of machine that performs the function of cooling and heating by utilizing
the heat-absorbing and heat-releasing consequence caused by the state variation of the refrigerant.
Although there are kinds of models, the working theory and the main structuring parts are basically
the same. Generally, the air-conditioner consists of the refrigerating system, electric control system
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