FUNCTION AND CONTROL
6.2Description of Each Control Operation
1.Temperature Parameters
Indoor preset temperature (Tpreset )
Indoor ambient temperature (Tamb.) 2. Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory function is available, for the first energization, if the compressor is at stop before
(1) Cooling Mode
Working conditions and process of cooling
When Tamb.≥ Tpreset, the unit will enter cooling operation, in which case the indoor fan, the outdoor fan and the compressor will work and the indoor fan will run at preset speed.
When Tamb.≤
When
Under this mode, the
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| Tamb |
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| Start cooling |
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| Tpreset |
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| Original working stat | e | |
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| Tpreset |
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| Stop cooling |
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| 6 minutes |
| 3 minutes |
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| 6 minutes |
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Compressor |
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| Outdoor fan |
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Indoor fan |
| Preset fan Speed | ||
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| Run |
| Stop |
Protection
Antifreeze protection
Under cooling and dry mode, 6 minutes after the compressor is started: If T evap.≤ 36F, the compressor will operate at reduced frequency.
If T evap.≤
If T evap. ≥ 42F and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original operation state.
Total current up and frequency down protection
If Itotal≤ A, frequency rise will be allowed; if Itotal ≥B, frequency rise will not be allowed; ifItotal ≥ C, the compressor will run at reduced frequency; and if Itotal ≥D, the compressor will stop and the outdoor fan will stop with a time lag of 30s.
(2) DRY Mode
Working conditions and process of dRY
If Tamb. Tpreset, the unit will enter cooling and dRY mode, in which case the compressor and the outdoor fan will operate and the indoor fan will run at low speed.
If
If Tamb.< Tpreset
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