2. Processes and functions
2-2 Freeze Prevention
Freeze Prevention keeps the indoor heat exchange coil from freezing. Freezing reduces the efficiency of the unit, and frost buildup on the coil blocks cool air circulation from the indoor unit’s fan.
| FREEZE |
| FREEZE |
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| PREVENTION |
| PREVENTION |
|
MORE THAN 10 MINUTES | 6 MINUTES | 10 MINUTES | 6 MINUTES |
|
INDOOR COIL |
|
|
|
|
TEMPERATURE |
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|
|
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| (THERMO ON) | ||
|
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| |
|
|
| (THERMO OFF) |
|
ON | OFF | ON | OFF | ON |
COMPRESSOR |
|
|
|
|
ON | OFF | ON | OFF | ON |
OUTDOOR FAN |
|
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|
|
SET SPEED
INDOOR FAN
0608_X_S
Fig. 7
2-3 Outdoor Fan Control
•In low outdoor temperature, the outdoor fan is set automatically from HIGH to LOW to prevent the indoor heat exchanger from freezing.
•When the outdoor temperature falls below 25.5°C, the outdoor fan is set from HIGH to LOW automatically. When the outdoor temperature rises to 27.5°C, the outdoor fan is set from LOW to HIGH automatically.
2
Fig. 8
SM830043
