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8. INITIAL SETTING
• When the refrigerant piping and wire installation work is completed, make the following settings as
required.
1. Setting for when connecting the COOL/HEAT SELECTOR to the BS unit.
〈Setting description〉
Set the input signal from the COOL/HEAT SELECTOR (sold separately) to ON/OFF.
〈Setting method〉
Set the dip switches (DS1-1) on PCB (A1P) as shown at left before turning on the power to the BS unit.
NOTES
This setting is read by the microcomputer when the BS unit power is turned on.
• Be sure to make the setting before turning on the power.
• Always close the EL. COMPO. BOX lid after making the setting.
2. Setting when changing the "Automatic mode differential" in the Cooling/Heating Automatic
Operation Mode.
〈Setting description〉
• The "Automatic mode differential" can be changed within the range of 0˚C to 7˚C (0˚C at factory shipment).
• For details regarding the "Automatic mode differential" and indoor unit operation, refer to the "Engineering
data book".
〈Setting method〉
The setting is made using the "Local Setting Mode" by the remote controller of indoor unit connected to the
BS unit.
For information regarding the setting method, refer to "Engineering data book".
The following table gives a list of the "MODE NO.," "FIRST CODE NO.," and "SECOND CODE NO."
NOTES
This setting is operated by the operation remote controller while the indoor unit power is turned on.
• When the indoor unit, outdoor unit, and BS unit installation work is completed, confirm that it is safe even
with the power turned on before proceeding with the work.
MODE NO.
FIRST CODE NO.
12 (22)
9. TEST OPERATION
(1) Check to make sure the EL. COMPO. BOX lid is closed.
(2) Refer to the Installation Manual included with the outdoor unit and conduct a test run.
• Clicking or humming sounds will continue for about 20 sec immediately after the power is turned on due
to the start of automatic initialization operation (closing) of the solenoid valve, but this is not a problem.
16
Turn on DS1-1.
SECOND CODE NO.
4
ON
ON
OFF
OFF
DS1-1
DS1-2
Automatic mode differential (˚C)
1
2
3
4
5
6
7
8
← At factory shipment.
0
1
2
3
4
5
6
7
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