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SiUS092230EA
Functions for FTXR Series
Part 4 Functions and Control
43
Note(s)
2.2 Fan Speed Control for Indoor Unit
Outline
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.
Automatic Fan
Speed Control
In automatic fan speed operation, the step SL is not available.
R4003512
= The airflow rate is automatically controlled within this range when
FAN
setting button is set
to automatic.
Cooling
The following drawing explains the principle of fan speed control for cooling.
The upper limit is at M tap in 30 minutes from the operation start.
Heating
In heating operation, the fan speed is regulated according to the indoor heat exchanger
temperature and the difference between the room thermistor temperature and the target
temperature.
The fan stops during defrost operation.
COMFORT
AIRFLOW
Operation
The fan speed is controlled automatically within the following steps.
Cooling
L tap ~ MH tap (same as AUTOMATIC)
Heating
In order to obtain a comfortable airflow, the fan speed may be set to a rate different from
automatic fan speed control.
POWERFUL operation and COMFORT AIRFLOW operation cannot be used at the same time.
Heating
Cooling
Step
LLL
LL
L
ML
M
MH
H
HH (POWERFUL)
(R21654)
+2.5°C (+4.5°F)
+1.5°C (+2.7°F)
+0.5°C (+0.9°F)
MH*
M
ML
L
+3°C (+5.4°F)
+2°C (+3.6°F)
+1°C (+1.8°F)
Fan speed
Room thermistor temperature – target temperature
Summary of Contents for RX-W Series
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Page 207: ...SiUS092230EA Check Part 6 Service Diagnosis 201 15 18 24 class R25105 1 2 3 4 Multimeter ...
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Page 239: ...SiUS092230EA Piping Diagrams Part 8 Appendix 233 RX24WMVJU9 3D141502 ...