En-24
4.11.2. FIELD SETTING
The following describes the switch functions and setups that are required for installing an outdoor unit.
1. SW1 Setting
SW1-1, 1-2 (Test run)
The setting SW1 is only performed on the master unit.
There is no need to make this setting on the slave unit.
* For details on the master and slave units, refer to page 1.
SW1-3 (Pump down)
For the pump down method, refer to “8. PUMP DOWN” .
2. SW2 Setting
SW2-1 (Silent operation mode)
The operating mode can be switched to this mode for reduced
noise during operation of the outdoor unit, such as at night.
The setting of SW2-1 must be done on both master and slave
units.
SW2-2 (Snow fall protection fan mode)
When this is set, the fan for the outdoor unit is operated peri-
odically even when the compressor is stopped to prevent the
unit from becoming covered with snow.
The setting of SW2-2 must be done on both master and slave
units.
SW2-3, 2-4 (Sequential start shift timing)
The timing of the start-up of the outdoor unit can be delayed
by several seconds with this setting.
The setting SW2-3, 2-4 is only performed on the master unit.
There is no need to make this setting on the slave unit.
* This feature is useful for limiting the start-up current when
multiple outdoor units are installed and started at the same
time.
3. SW3 Setting
SW3-1, 3-2 (Outdoor model)
Never change the DIP SW3-1, 3-2 which are set up at fac-
tory.
SW3-3, 3-4 (Outdoor unit address)
The setting of SW3-3, 3-4 is to be done when installing Slave 2.
There is no need to make this setting on the master unit.
* This setting is only enabled when the power is turned on.
SW1-1 SW1-2 Control mode Remarks
OFF OFF Normal (Factory setting)
ON OFF Test run (Cooling)
OFF ON Test run (Heating)
ON ON Normal
Table 4.11-2 DIP SW1-1, 1-2 setting
Refer to
Chapter “6”
for the test
run methods.
Table 4.11-4 DIP SW2-1 setting
Table 4.11-5 DIP SW2-2 setting
SW2-2 Snow fall protection fan mode
OFF Release (Factory setting)
ON Operate
SW2-3 SW2-4 Sequential start mode
OFF OFF Normal (Factory setting)
OFF ON 21 second delay
ON OFF 42 second delay
ON ON 63 second delay
Table 4.11-6 DIP SW2-3, 2-4 setting
SW3-3 SW3-4 Remarks
OFF OFF 0
(Factory setting) Master unit
OFF ON 1
(Factory setting) Slave unit 1
ON OFF 2 Slave unit 2
ON ON Forbidden
Table 4.11-8 DIP SW3-3, 3-4 setting
Outdoor unit
address
Table 4.11-3 DIP SW1-3 setting
SW1-3
Pump Down
Remarks
Setting (reference)
OFF (Factory setting) Release ON → OFF
ON Operate OFF → ON
Table 4.11-7 DIP SW3-1, 3-2 setting
SW3-1 SW3-2 Outdoor Unit Model
OFF OFF AJ
A72
OFF ON AJ
A90
ON OFF AJ
126
ON ON Forbidden
SW2-1 Silent operation mode
OFF (Factory setting) Release
ON Operate
9374241033_IM_en_p18-36.p65 26/8/2008, 18:2324
To Next Page
Loading...
