Dip Sw Setting; Silent Operation Mode (Cooling Mode Only) (Setting For Master And Slave Unit); Sequential Start Shift - Fujitsu Airstage V series Service Manual

SW1 setting
Test run ( cooling & Heating )
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
SW1-1 SW1-2
OFF OFF
ON OFF
OFF ON
ON ON
Pump down operation
Pump down operation is set with SW1-3
PUMP DOWN OPERATION
SW1-3 Pump down operation
OFF
ON
Dip SW 1-4 setting forbidden
SW1-4 OFF
SW2 setting

Silent operation mode (Cooling mode only) (Setting for master and slave unit)

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.)
SILENT OPERATION MODE
SW 2-1
OFF
ON
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
SW2-2
Snow falling protection fan mode
OFF
ON

Sequential start shift

The start-up timing of outdoor unit (compressor) can be set up so that it can delay several seconds.
SW2-3 SW2-4
OFF OFF
OFF
ON
ON OFF
ON
ON
*This feature is useful when multiple number of outdoor units are installed and turned on at the same time
to limit the starting current.
( Only for master unit )
Test Run
Normal operation
Cooling test run
Heating test run
Normal operation
( Only for master unit )
(
Release ON
Operate
OFF
( Factory setting)
Silent operation mode
Release
Oparate
Release
Operate
( Only for master unit )
( Factory setting)
Sequential start shift timing
Normal
21 sec. delay
42 sec. delay
63 sec. delay
02-23
(
Remarks
SW1-1/SW1-2: OFF/ON or ON/OFF
SW1-1/SW1-2: OFF/OFF or ON/ON
SW1-1/SW1-2: OFF/OFF or ON/ON
SW1-1/SW1-2: OFF/ON or ON/OFF
Factory setting)
Remarks
OFF
ON
Remarks
ON OFF
OFF ON
( Factory setting)
Remarks
OFF
ON
OFF ON
Factory setting)
OFF/OFF
ON/OFF
OFF/ON
ON/ON