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Service Manual
1. MAIN UNIT FUNCTION
• DISPLAY
Operation Indicator
• On while in appliance operation, off while in appliance pause
• Flashing if unit is disconnected or has experienced a short in the thermistor (3 seconds off/0.5 sec on).
Sleep Timer Indicator
• On while in sleep time mode, off when sleep timer mode is canceled or appliance operation is paused.
Timer Indicator
• On while in timer mode (on/off), off when timer mode is completed or canceled
Defrost Indicator
•
Off except when units is in hot start mode (heat pump model only) or while unit is running in defrost control mode.
■ Cooling Mode Operation
• When the intake air temperature reaches 0.5°C(0.9
°F)
below the set point temp, the compressor and the out-
door fan stop.
• When it reaches 0.5°C(0.9
°F)
above the set point temp, they start to operate again.
Compressor ON Temp ➲ Set point Temp+0.5°C(0.9
°F)
Compressor OFF Temp ➲ Set point Temp-0.5°C(0.9
°F)
• While the compressor is running, operating with the airflow speed set by the remote control. While compressor
is off, fan operates at low speed regardless of the set point.
■ Soft Dry Operation Mode
• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the set point temp is automatically set according to the intake air temperature.
26°C(78.8
°F)
≤ Intake Air Temp ➲ 25°C(77
°F)
24°C(75.2
°F)
≤ Intake Intake Air Temp<26°C(78.8
°F)
➲ Intake Air Temp-1°C(30.2
°F)
18°C(64.4
°F)
≤ Intake Intake Air Temp<24°C(75.2
°F)
➲ Intake Air Temp-0.5°C(31.1
°F)
Intake Air Temp<18°C(64.4
°F)
➲ 18°C(64.4
°F)
• While the compressor is off, the indoor fan repeats low airflow speed and stop.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification
operation and 4-min compressor off repeat.
Compressor ON Temp. ➲ Set point Temp+0.5°C(0.9
°F)
Compressor OFF Temp. ➲ Set point Temp-0.5°C(0.9
°F)
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
■ Heating Mode Operation
• When the intake air temp reaches +3°(37.4
°F)
…above the set point temp, the compressor is turned off. When
below the set point temp, the compressor is turned on.
Compressor ON Temp. ➲ Set point Temp.
Compressor OFF Temp. ➲ Set point Temp.+3°C(37.4
°F)
• While compressor is on, the indoor fan is off when the indoor pipe temp. is below 20°C(68
°F)
, when above
27°C(80.6
°F)
, it operates at low speed. When the indoor pipe temp is between 20°C(68
°F)
and 27°C(80.6
°F)
, it
Function of control
Operation
Operation