1
- 17
2WAY SYSTEM
Control Functions-Outdoor Unit
1
5. Outdoor Fan Controls
5-6. Silent Mode
This unit includes 2 types of silent modes.
Max. fan mode in silent mode
Outdoor unit cacacity
-3dB mode
-5dB mode
8 HP
11
8
10 HP
11
10
12 HP
10
9
14 HP
9
8
16 HP
9
8
18 HP
11
10
20 HP
11
10
Selecting the silent mode results in operation that gives priority to reducing noise, because these modes involve
restrictions on outdoor unit fan modes, the capacity will be somewhat reduced.
* The compressor capacity (frequency) is not limited. However, the capacity of the compressor decreases by road
map control because of the pressure caused by the decreased fan rotational speed.
* To activate this function, it is necessary to set it to each outdoor unit.
CODE: 05
Setting No
Silent mode
External input to PCB
Max. effect
Capacity reduction
0
Invalidity
(Factory preset mode)
-
-
-
1
Silent is given priority
Necessary
-3dB
Approx -1 HP
2
-5dB
Approx -2 HP
3
Unnecessary
-3dB
Approx -1 HP
4
-5dB
Approx -2 HP
5
Capacity is given priority
Necessary
-3dB
Max. -1 HP
6
-5dB
Max. -2 HP
7
Unnecessary
-3dB
Max. -1 HP
8
-5dB
Max. -2 HP
9
Controlled in moderation
Necessary
-3dB
Max. -1 HP
10
-5dB
Max. -2 HP
11
Unnecessary
-3dB
Max. -1 HP
12
-5dB
Max. -2 HP
* When the setting is "external input to PCB necessary", this function works by short circuiting "SILENT" pins.
* When the setting is "external input to PCB unnecessary", this function always works.
* When the setting is "Capacity is given priority", this function works excluding the following conditions.
Condition that silent mode interrupts
Cooling operation: Ambient temperature
≧
38
℃
Heating operation: Ambient temperature
≦
2
℃
This function will be useful for nighttime in summer.
* When the setting is "Controlled in moderation", max. fan mode is decided in the following formula.
Max. fan mode = 14 - ( 35 – Ambient temperature) / 2
However, minimum fan mode is “6”, maximum is “14”. (When high static pressure mode, max is “15”)
5-7. High Static Pressure Mode
The outdoor unit allows a high static pressure changing the settings.
The maximum permissible static pressure is 8 mmAq.
EEPROM setting in each outdoor unit
CODE: 8F
Setting No
0
Invalid
(Factory preset mode)
1
High static pressure mode
2 - 6
No use (Never use)
SM830186-00̲2WAY ECO-i.indb 17
SM830186-00̲2WAY ECO-i.indb 17
2010/12/24 10:09:52
2010/12/24 10:09:52
