Processes and Functions
6
TD831077
VI - 5
3. Fan Control
(1) Outdoor fan mode
(2) Initial control
Control is performed during the initial 30-second operation starting period based on the external temperature as
shown in the table below.
(3) The fan mode can be moved up or down based on the operating status. However, fan mode No. 0
is not available during heating operation.
(4) When the fans are started up, they run at High for 12 seconds.
4. Outdoor Electronic Expansion Valve
(1) When the outdoor unit is stopped: 0 pulses (initialized by stopping operation)
However, control is performed at 55 pulses in systems with only the AD unit if all of the units are stopped during
cooling mode.
(2) During cooling operation : 480 pulses
(3) During heating operation :
∆∆∆∆∆
T control at each heat exchanger
¶
∆
T=Gas temperature - liquid temperature
¶
The target
∆
T is 3
°
C to 8
°
C (adjustable using the operation capacity)
The control range is 30 to 480 pulses.
Mode
Fan No. 1
Fan No. 2
8
High
High
7
High
Medium
6
Medium
Medium
5
Medium
Low
4
Low
Low
3
High
Stop
2
Medium
Stop
1
Low
Stop
0
Stop
Stop
Table 10
[PC unit]
[AD unit]
* When fan No. 1 is set to Low, fan No. 2 cannot be set to High.
21
Fan mode: 8 (3)
16
Fan mode: 4~8 (3)
11
Fan mode: 2~6 (3)
1
Fan mode: 1~4 (2)
0
Fan mode: 1~3 (2)
21
Fan mode: 1~6 (2)
16
Fan mode: 4~8 (3)
11
Fan mode: 6~8 (3)
10
Fan mode: 8 (3)
During cooling operation
During heating operation
External temperature
°
C
External temperature
°
C
Table 11
Table 12
NOTE
The initial fan speed of PC unit may change based on the operation capacity of the
outdoor unit.
The initial fan speed for the AD unit is shown in parentheses.
Mode
Fan
5
–
4
–
3
High
2
Medium
1
Low
0
Stop