Electronic Function; Abbreviation; Display Function - North American HVAC MSC-28CRDN1-MN15W Service Manual

8. Electronic function

8.1 Abbreviation

T1: Indoor room temperature
T2: Coil temperature of evaporator
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature

8.2 Display function

8.2.1 Icon explanation on indoor display board.
① Auto indicator
This indicator illuminates when the air conditioner is in AUTO operation.
② Timer indicator
This indicator illuminates when TIMER is set ON/OFF.
③ PRE.-DEF. Indicator
This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air
control feature is activated in heating mode.
④ TEMPERATURE indicator
Usually it displays the temperature settings. When change the setting temperature, this indicator
begins to flash, and stops 20 seconds later. It displays the room temperature when the air conditioner
is in FAN only operation, and the range of that is 0~50℃. When the unit stops operation, it returns to
original factory settings. It will also display the codes when malfunction or protection happen.
⑤ Frequency indicator
This indicator appears only when the compressor is in operation and indicates the current operating
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