Ballu BSGI 09, Service Manual

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6
6
.
.
C
C
O
O
N
N
T
T
R
R
O
O
L
L
M
M
O
O
D
D
E
E
L
L
T
room
-T
set
Indoor fan speed
T
room
-T
set
≤
2
0
C Low
2
0
C
<
T
room
-T
set
<
4
0
C Medium
T
room
-T
set
≥
4
0
C
High
6-3-7-4 Prevention against condensation and insufficient heat exchange at the low indoor fan
speed.
When the indoor fan speed is set at the low fan speed, the compressor’s power is restricted as
in the low temperature cooling.
6-3-7-5 4-way valve
State: It is interrupted in cooling.
Switchover: When initially powered on for cooling, the 4-way valve is interrupted immediately.
When the heating is changed to the cooling, it needs an interval of 50 seconds for the 4-way
valve to change over from being activated to being interrupted.
6-3-8 Heating-run mode
6-3-8-1 Temperature compensation
Principle for compensation: The compensation is available only if the proper sensor is used
and it is not available when it is subject to the sensor on the remote controller or line controller.
6-3-8-2 Indoor fan
The fan speed is set at the high, medium or low fan speed, it operates at a preset speed (in
the cold air prevention, it is forced to run at the ultra-low flowrate or stop).
When the fan speed is set in the auto-run, the fan speed setting is made according to the room
temperature differences (except for the cold air prevention).
T
set
-T
room
Indoor Fan Speed
T
set
-T
room
≤
2
0
C Low
2
0
C
<
T
set
-T
room
<
4
0
C
Medium
T
set
-T
room
≥
4
0
C
High
6-3-8-3 Cold air prevention
In the heating-run, to prevent the indoor fan from blowing cold air, the indoor fan speed is
different from the set speed after turning on air-conditioner.
6-3-8-4 Residual heat blowing off
22
BSGI 09(12)