9.2. PROTECTION CONTROL FOR COOLING & SOFT DRY
1. Anti-Freezing Control
·
When the temperature of the indoor heat exchanger becomes low, the compressor operating frequency is reduced and
stopped when the temperature falls to lower than 2°C continuously for 6 minutes. This is to prevent freezing of indoor heat
exchanger. When the temperature rises to 4°C or above, thermostat OFF with 3 minutes. The compressor operating
frequency will resume to normal when the temperature reaches 14°C.
·
Indoor fan speed will increase when the temperature falls and it will resume to original speed when the temperature
increases to 14°C for 5 minutes continuously.
Refer to8.3.2. Compressor Operation Frequency
Note:
The above phenomenon occurs when the fan is running at Me+ or below.
2. Anti-Dew Formation Control
·
When the following conditions occur for 20 minutes continuously, anti-dew formation is controlled:
(1) Indoor intake air temperature is 24°C or above.
(2) Outdoor air temperature is less than 30°C.
(3) Remote control setting temperature is less than 25°C.
·
During anti-dew formation control, compressor Operation Frequency Command Number at 8 and vertical airflow direction
blade moves down slightly (as shown in Airflow Direction Control). Indoor fan speed increases by 1 rank if it is set at Low
or below or decreases by 2 ranks if it is set at Hi speed.
·
This control is cancelled immediately when either condition 1-3 as written above is changed, or remote control setting
temperature or fan speed is changed.
3. Anti-Fog Discharge Control
·
The compressor operating frequency is regulated by outdoor air temperature and operation time to prevent fog discharged
from indoor unit as shown in the table below.
Note:
−
− −
− Indoor fan is running at Me+ or below.
−
− −
− After 420 minutes from the start of operation, the operation timer counting is restarted from "0".
4. Anti-dew formation control
·
The expansion valve is controlled to maintain the temperature difference between at center of heat exchanger ( pipe
temperature 1 ) and at inlet of heat exchanger ( pipe temperature 2 ) will be less than 4°C.
39
CS-MVG103KE / CU-MVG153KE
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