User's Manual

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2
2. Processes and functions
SM830043
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.
Fig. 7
COMPRESSOR
OUTDOOR FAN
INDOOR FAN
OFF
OFF OFF
OFF
INDOOR COIL
TEMPERATURE
MORE THAN 10 MINUTES
FREEZE
PREVENTION
6 MINUTES 10 MINUTES
FREEZE
PREVENTION
6 MINUTES
(THERMO OFF)
(THERMO ON)
–1°C
ON
ON
ON
ON
ON
ON
0608_X_S
SET SPEED
Fig. 8
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.