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When does the air conditioner need to add fluoride

Update:12-12-2020
Summary:

1. Use for more than 5 years (split air conditioners wi […]

1. Use for more than 5 years (split air conditioners will naturally leak);
2. the machine has been moved multiple times (part of the freon will be consumed when the air conditioner is installed and empty);
3. the exposed part of the thick tube (i.e. low pressure tube) at the connection point of the outdoor machine in summer is not dew or cold;
4. the outside fan exhaust is not hot in summer;
5. summer return air pressure (thick pipe) is lower than 0.4 MPa;
6. the compressor operating current is less than the normal value marked on the nameplate;
7. the high pressure tube (thin tube) is frosted in summer;
8. In summer, the internal unit of the air conditioner freezes or blows fog (sometimes it is accompanied by water leakage in the internal unit);
9. the thick tube at the copper tube interface of the external machine is not hot in winter;
10. the air conditioner has leaks;
11. The air conditioner stopped ten minutes after it was turned on. (Low pressure protection or compressor overheat protection)

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