2. Processes and functions
1
1
2
3
4
5
II - 4
SM830080
2-2
Cold Draft Prevention (Heating Cycle)
The cold draft prevention function controls indoor fan speed so a strong draft of cold air
will not blow out before the indoor heat exchange coils have warmed up.
❑
STANDBY shows on the remote controller when the indoor fan speed is LL
(very low) or OFF. This condition occurs in the following 3 cases:
• During Thermo OFF (refer to 2-1 B). Room Temperature Control, Heating)
• During the defrosting operation (refer to 2-10 Defrosting Control, Heating)
• Until either the coil temperature E2 reaches 27°C or when a maximum of 6
minutes has past.
❑
The indoor fan motor operates in L instead of LL for 3 seconds as it starts to
give the fan an initial boost.
Chart Summary and Explanations
❑
The main idea of this chart is to show that the indoor fan speed increases and gets closer to
the set fan speed as the coil temperature E2 rises.
❑
The indoor unit’s coil temperature is taken from sensor E2 located in the middle of the indoor
heat exchange coil.
❑
The dotted line shows that the indoor fan motor is OFF. When the temperature at sensor E2
falls below 10°C, the indoor fan motor stops running.
Fig. 3
33
31
27
25
10
SET
FAN
SPEED
AUTO OR H
M
L
LL
LL/OFF
LL
L
L
L
LL
LL/OFF
LL
L
M
M
LL
LL/OFF
LL
L
M
H
MAX. 6 MINUTES
“STANDBY”
INDICATOR
INDOOR UNIT
COIL TEMP.
E2 (
°
C)
LL= Very low speed
L= Low speed
M= Medium speed
H= High speed
“STANDBY” APPEARS
0673_X_S
