02-23
SW1 setting
Test run ( cooling & Heating ) ( Only for master unit )
All the indoor units connected to the outdoor unit can be test-operated by DIP switch setting.
SELECTOR SWITCH FOR TEST RUN AND NORMAL OPERATION
Pump down operation ( Only for master unit )
Pump down operation is set with SW1-3
PUMP DOWN OPERATION
Silent operation mode (Cooling mode only) (Setting for master and slave unit)
SW2 setting
SILENT OPERATION MODE
Silent operation mode
Release
SW 2-1
ON Oparate
OFF
Snow falling protection fan mode (Setting for master and slave unit)
When the outdoor temperature falls to 5 C, to prevent the unit from being covered with snow , the outdoor
fan is periodically operated by this switch even when the compressor is stopped.
SNOW FALLING PROTECTION FAN MODE
Snow falling protection fan mode
Release
SW2-2
ON
Operate
OFF
SW1-1 SW1-2 Test Run Remarks
OFF OFF Normal operation
ON OFF Cooling test run
OFF/OFF or ON/ON
ON
OFF Heating test run
ON ON Normal operation
SW1-3 Pump down operation Remarks
OFF Release
ON Operate
OFF
Remarks
( Factory setting)
( Factory setting)
( Factory setting)
ON/OFF
SW1-1/SW1-2:
OFF/ON or ON/OFF
OFF/OFF
SW1-1/SW1-2:
OFF/OFF or ON/ON
OFF/ON
SW1-1/SW1-2:
OFF/ON or ON/OFF
ON/ON
SW1-1/SW1-2:
ON
ON
OFF
OFF
ON
ON
OFF
Remarks
OFF
ON
ON
OFF
Sound level can be reduced using silent operation mode at cooling operation.
(when the outdoor temperature falls to 29 C, and the discharge pressure decreases to 3.0MPa or below.)
( Factory setting)
DIP SW SETTING
Dip SW 1-4 setting forbidden
SW1-4 OFF
Sequential start shift ( Only for master unit )
The start-up timing of outdoor unit (compressor) can be set up so that it can delay several seconds.
Sequential start shift timing
Normal
SW2-3 SW2-4
ON
21 sec. delay
OFF OFF
OFF
ON
ON
ON
OFF
42 sec. delay
63 sec. delay
*This feature is useful when multiple number of outdoor units are installed and turned on at the same time
to limit the starting current.
( Factory setting)
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