Main Functions
SiBE04-809
18
Function and Control
1.4
Fan Speed Control
for Indoor Units
Control Mode
The airflow rate can be automatically controlled depending on the difference between the set
temperature and the room 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 81.
Phase Steps
Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H and HH.
In automatic fan speed operation, the step “SL” is not available.
= Within this range the airflow rate is automatically controlled when the FAN setting
button is set to automatic.
Note:
1. During POWERFUL operation, fan operates H tap + 50 - 70 rpm.
2. Fan stops during defrost operation.
Automatic
Airflow Control
for Heating
On heating mode, the indoor fan speed will be regulated according to the indoor heat exchanger
temperature and the difference between the room temperature and the required set point.
Automatic
Airflow Control
for Cooling
The following drawing explains the principle of fan speed control for cooling:
Step
Cooling
Heating
Dry mode
LLL (Heating thermostat OFF)
25/35kW class :
830 - 980 rpm
(During POWERFUL
operation : 1030 rpm)
LL (Cooling thermostat OFF)
L
ML
M
MH
H
HH (POWERFUL)
(R4085)
(R4085)
+1.5˚C
+2.5˚C
+0.5˚C
+2˚C
+3˚C
+1˚C
M
ML
MH
L
fan speed
Difference between room
and set temperature
Phase control
Thermostat
setting
temperature
(R3300)
Summary of Contents for ARXG25E3V1B
Page 1: ...SiBE04 809 Applied Models Inverter Pair Heat Pump Inverter Pair Wall Mounted Type E Series ...
Page 11: ...Introduction SiBE04 809 x ...
Page 12: ...SiBE04 809 List of Functions 1 Part 1 List of Functions 1 List of Functions 2 ...
Page 14: ...SiBE04 809 Specifications 3 Part 2 Specifications 1 Specifications 4 ...
