– 28 –
INDOOR UNIT CONTROL CIRCUIT (CONTINUED)
NO.
6
Item
Fan speed control
Overview of specifications
(1) A fan speed HH (quick high), H (high), L (low) or AUTO is
selected according to the instruction from remote controller for
FAN mode operation.
(2) Fan speed is switched according to the difference between Ta
and Ts in the AUTO mode.
[Cooling]
Remarks
HH > H+ > H > L+ > L > UL
Wireless type allows HH, H+,
H, L+, L, and AUTO.
[HH]
[H+]
[H]
[L+]
[L]
Tc: Indoor unit heat
exchange sensor temp.
• The fan speed control is the same for temperature setting by
remote controller or the unit.
• Once fan speed is changed, it remains unchanged for 3 minutes
unless different fan speed is selected by instruction.
• At the beginning of cooling, a falling gradient (higher fan speed)
is selected.
• When the temperature difference between Ta and Ts is on a
threshold line, fan speed does not change.
• ( ): Auto cooling
[Heating]
( ): Temperature setting by remote controller
Other than ( ): Temperature setting by unit
• Once fan speed is changed, it remains unchanged for one
minute unless different fan speed is selected by instruction.
• At the beginning of heating, a rising gradient (higher fan speed)
is selected.
• When the temperature difference between Ta and Ts is on a
threshold line, fan speed does not change.
• ( ): Auto heating
• Fan speed is switched to a higher level when Tc reaches 60°C.
Ta (˚C)
+3.0
+2.5
+2.0
+1.5
+1.0
+0.5
Tsc
–0.5
HH
(HH)
H+ (HH)
H (HH)
L+ (H+)
L (H)
L (H)
L (L+)
D
C
B
A
E
F
G
Ta (˚C)
(–0.5) –1.0
(0) Tsh
(+0.5) +1.0
(+1.0) +2.0
(+1.5) +3.0
(+2.0) +4.0
L (L+)
L+ (H)
H (H+)
HH
(HH)
H+
(HH)
E
D
C
B
A
