16. Electronic Function 
16.1 Abbreviation 
T1: Indoor room temperature 
T2: Coil temperature of indoor heat exchanger 
T3: Coil temperature of condenser 
T4: Outdoor ambient temperature 
T5: Compressor discharge temperature 
Td: Target temperature 
Tsc: Adjusted setting temperature 
16.2 Display function 
16.2.1 Icon explanation on indoor display board 
(Duct) 
OPERATION
TIMER
DEF./FAN
ALARM
Temporary button
Operation lamp
Timer indicator
Infrared signal receiver
Alarm indicator
PRE-DEF indicator(cooling and heating type)
or fan only indicator(cooling only type)
MANUAL
Display digital tube
16.2.2 Icon explanation on indoor display board 
(Compact cassette). 
 
16.2.3 Icon explanation on indoor display board 
(slim Cassette). 
 
 
16.2.4 Icon explanation on indoor display board 
(Console). 
 
16.2.5 Icon explanation on indoor display board 
(Ceiling Floor) 
 
16.2.5 Icon explanation on indoor display board 
(New Cassette). 
 
16.3 Main Protection 
16.3.1  Three  minutes  delay  at  restart  for 
compressor 
1 minute delay for the 1
st
 time stand-up and  3 
minutes delay for others. 
16.3.2  Temperature  protection  of 
compressor top 
The unit will stop working when the compressor 
top temp. protector cut off, and will restart after 
the compressor top temp. protector restart. 
16.3.3  Temperature  protection  of 
compressor discharge 
When  the  compressor  discharge  temp.  is 
getting  higher,  the  running  frequency  will  be 
limited as below rules: