Cold Draft Prevention (Heating Cycle) - Sanyo SPW-XR253GH56 Technical Data & Service Manual

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.
INDOOR UNIT
COIL TEMP.
1
1 2
SET
FAN
SPEED
"STANDBY"
INDICATOR
3
4
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.
5
33
MAX. 6 MINUTES
31
E2 (°C)
27
25
10
AUTO OR H LL LL/OFF
M LL LL/OFF
L LL LL/OFF
"STANDBY" APPEARS
LL= Very low speed
L= Low speed
Chart Summary and Explanations
2. Processes and functions
LL L M
LL L M
LL L L
M= Medium speed
H= High speed
II - 4
H
M
L
0673_X_S
Fig. 3
SM830080