SiBE12-933_A
Main Functions
Function and Control
61
1.5
Fan Speed Control for Indoor Units
Control Mode
Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH.
The airflow rate can be automatically controlled depending on the difference between the room
thermistor temperature and the target temperature. This is done through phase control and Hall
IC control.
For more information about Hall IC, refer to the troubleshooting for fan motor on page 177.
Fan Speed Steps
In automatic fan speed operation, the step “SL” is not available.
= The airflow rate is automatically controlled within this range when the FAN setting
button is set to automatic.
Note:
1. Fan stops during defrost operation.
2. In time of thermostat OFF, the fan rotates at the following speed.
Cooling : The fan keeps rotating at the set tap.
Heating : The fan keeps rotating at LLL tap (FTXS, ATXS and FVXS series) or stops (the other
models).
In case of ATX20-35G
= The airflow rate is automatically controlled within this range when the FAN setting
button is set to automatic.
Note:
1. During POWERFUL operation, fan operate H tap + 80 rpm.
2. Fan stops during defrost operation.
3. The airconditioner does not operate with MH tap from a start of the auto fan speed operation
for about 30 minutes.
F(A)TXS20-50G
F(C)(A)TXG25-50E
FVXS25-50F
FDK(X)S25-35EA
FDK(X)S50C
FLK(X)S25-50BA
Step
Cooling
Heating
Cooling
Heating
LLL
LL
L
ML
M
MH
H
HH
(POWERFUL)
H+70
(FTXG25/35E,
ATXG25/35E)
H+50
(FTXS20-50G,
ATXS20-50G,
ATXG50E,
CTXG50E)
H+40
(FVXS25-50F)
H+50
(FTXS20-50G,
ATXS20-50G,
FTXG25/35E,
ATXG25-50E,
CTXG50E)
H+40
(FVXS25-50F)
H+50
H+50
(R11681)
(R6834)
(R6833)
(R6834)
Step
Cooling
Heating
Dry Mode
LLL (Heating thermostat OFF)
L tap
(During POWERFUL
operation: L+80rpm)
LL
L
ML
M
MH
H
HH (POWERFUL)
(R14044)
(R14045)