Panasonic U-8ME1E81 Service Manual page 26

5. Outdoor Fan Control
5. Outdoor Fan Control
5-2-3. Silent Mode
This unit includes 2 types of silent modes.
See the table under the section "5-2. Fan mode" for maximum fan mode in silent mode.
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
1
decreased fan speed of rotation.
* To activate this function, it is necessary to set it to each outdoor unit.
CODE : 05
Setting No.
0
1
2
3
4
5
6
7
8
9
10
11
12
* 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 "silent priority", max. fan mode is decided in the following formula.
Max. fan mode = 13 - ( 35 – Ambient temperature) / 2
* When the setting is "capacity priority", this function works excluding the following conditions.
* When the setting is "controlled in moderation", this function controls both "silent priority" and "capacity priority".
Condition that silent mode interrupts
Heat exchanger [condenser] of outdoor unit: Ambient temperature ≥ 38°C
Heat exchanger [evaporator] of outdoor unit: Ambient temperature ≤ 2°C
This function will be useful for nighttime in summer.
* When the setting is "controlled in moderation", this function controls both "silent priority" and "capacity priority".
Thereof, "silent priority" fan mode is set within the temperature range of "capacity priority".
Mode
Invalidity (Factory preset mode)
Silent priority
Capacity priority
Controlled in moderation
Control Functions-Outdoor Unit Control Functions - Outdoor Unit
External input to PCB
-
Necessary
Unnecessary
Necessary
Unnecessary
Necessary
Unnecessary
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2WAY SYSTEM
2WAY SYSTEM
Silent mode
-
Silent mode Mode 1
Silent mode Mode 2
Silent mode Mode 1
Silent mode Mode 2
Silent mode Mode 1
Silent mode Mode 2
Silent mode Mode 1
Silent mode Mode 2
Silent mode Mode 1
Silent mode Mode 2
Silent mode Mode 1
Silent mode Mode 2