Temp. 
on the top of 
comp.
Power to 
O.U.: ON
Power to CH : ON
Power to CH : OFF
I.U.:   Indoor unit
O.U.:  Outdoor unit
≥ 60 ºC
Power to 
I.U.: ON
Power to PCB in 
I.U.: ON
Start of transmission between 
I.U. and O.U.
Start of transmission between 
I.U. and remote control switch
Auto-louver 0 
Reset
≤ 55 ºC
Setting at 
HEAT
HEAT indication
Set temp. indicated
Pressing 
TEMP. 
switch
  Switch: increasing set temp.
  Switch: decreasing set temp.
Pressing 
RUN/STOP 
switch
Run LED:ON, RUN is indicated
Indication of unit 
stoppage cause (d1-22)
After  
power 
supply
Temp. 
on the top of 
comp.
Temp. 
on the top of 
comp.
Temp. 
on the top of 
comp.
< 4 hours
(* < 2 hours)
≥ 4 hours
(* ≥ 2 hours)
< 50 ºC
(* < 30 ºC)
≥ 50 ºC
(* ≥ 30 ºC)
< 40 ºC
(* < 30 ºC)
≥ 40 ºC
(* ≥ 30 ºC)
< Ta+20 ºC
≥ Ta+20 ºC
I.U. 
air 
intake 
HEATING 
operation
to 1
Higher than set 
temp. +2 ºC
Lower than 
set temp. 
25 ºC ~ 30 ºC
Lower than 
25 ºC
Power to 
CMC : ON
1 sec.
I.U. 
air discharge 
temp.
Yes
Power to 
MOF
Power to PCB in 
O.U.: ON
Pressing 
FAN switch
Air 
over switch
HIGH indication
MEDIUM indication
LOW indication
Power to YH2 for 
20 sec.
MD : ON
(for unit with drain pump)
Power to RVR 
: ON
Power 
Operation at 
slow fan speed
Operation at 
setting fan speed
Only for I.U. with 
auto-louver
MIF operation 
at slow speed
Power to 
Y52C : ON
Power to Y21 
: ON
Operation at 
low fan speed
Higher 
than 30 ºC
After 30 sec.
No
* Test run:
Hot start protection is activated 
after 2 hours or 30ºC.
* Standard operation:
Hot start protection is activated 
after 4 hours or 40ºC.
Only RAS-8~12HRNM
A
A