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Wall Mounted Multi-Zone Split System Air Conditioner
Operation
operates (except in sleep mode, the airflow will be at medium speed).
• While compressor is off, the indoor fan is off when the indoor pipe temp is below 33°C(91.4
°F)
, when above
35°C(95
°F)
, it operates with the low airflow speed.
• While in defrost mode, the indoor and outdoor fans are turned off.
■ Defrost Control(Heating)
• While in defrost mode, the indoor and outdoor fans are turned off.
• Defrost operation is controlled by timer and sensing temperature of the outdoor pipe.
• The first defrost cycle starts only when the outdoor pipe temperature falls below -6°C (21.2° F) after 35 min-
utes has passed from the start of the heating operation and more than 4 minutes since the last of operation of
the compressor.
• Defrost ends after 12 minutes passed from starting of defrost operation when the outdoor pipe temperature
rises over 15°C(59
°F)
even before 12 minutes.
• The second defrost cycle starts only when the outdoor pipe temperature falls below -6°C(21.2
°F)
after 35 min-
utes passed from ending the second defrost cycle and more than 4 minutes since the last operation of the
compressor.
■ Fuzzy Operation
• When the unit is turned on and an operation mode has not been selected, after 3 hours has passed, the opera-
tion mode will be automatically selected via fuzzy operation.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air
temp at that moment as follows.
24°C(75.2
°F)
≤ Intake Air Temp ➲ Fuzzy Operation for Cooling
21°C(69.8
°F)
≤ Intake Air Temp<24°C(75.2
°F)
➲ Fuzzy Operation for Dehumidification
Intake Air Temp<21°C(69.8
°F)
➲ Fuzzy Operation for Heating
• However, if any of the operation modes among cooling / dehumidification / heating mode operations has been
carried out for 10 sec or longer before Fuzzy operation, the last mode that the unit operated in will be automati-
cally selected.
1) Fuzzy Operation for Cooling
• According to the set point temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9
°F)
or more
below the set point temp, the compressor is turned off. When 0.5°C(0.9
°F)
or more above the set point temp,
the compressor is turned on.
Compressor ON Temp ➲ Set point Temp +0.5°C(0.9
°F)
Compressor OFF Temp ➲ Set point Temp + 0.5°C(0.9
°F)
• At the beginning of Fuzzy mode operation, the set point temperature is automatically selected according to the
intake air temp at that time.
26°C(78.8
°F)
≤ Intake Air Temp ➲ 25°C(77
°F)
24°C(75.2
°F)
≤ Intake Air Temp<26°C(78.8
°F)
➲ Intake Air Temp + 1°C(1.8
°F)
22°C(71.6
°F)
≤ Intake Air Temp<24°C(75.2
°F)
➲ Intake Air Temp + 0.5°C(0.9
°F)
18°C(64.4
°F)
≤ Intake Air Temp<22°C(71.6
°F)
➲ Intake Air Temp
Intake Air Temp<18°C(64.4
°F)
➲ 18°C(64.4
°F)
• When the Fuzzy key (Temperature Control key) is input after the initial set point temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the set point temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-
ature.