Service Manual

SiUS181631EA Field Settings
Test Operation and Field Settings 131
2.1.2 COOL/HEAT Changeover Setting by DIP Switches
The following field settings are made by DIP switches on the service PCB.
Press BS2 (SET button) and match with the LEDs No. 1 - 15, press BS3 (RETURN button), and
confirm the data for each setting.
★
Data such as addresses and number of units is expressed as binary numbers; the two ways of
expressing are as follows:
The No. 1 cool/heat unified address is expressed as a binary number
consisting of the lower 6 digits. (0 - 63)
In the figure 1, the address is 010110 (binary number), which
translates to 16 + 4 + 2 = 22 (base 10 number). In other words, the
address is 22.
The number of terminal blocks for No. 12 and 13 is expressed as an
8-digit binary number, which is the combination of four upper, and
four lower digits for No. 12 and 13 respectively. (0 - 128)
In the figure 2, the address for No. 12 is 0101, the address for No. 13
is 0110, and the combination of the two is 01010110 (binary number),
which translates to 64 + 16 + 4 + 2 = 86 (base 10 number). In other
words, the number of terminal block is 86.
★
Refer to the preceding page for a list of data, etc. for No. 0 - 25.
l hlhllh
16 4 1
32 8 2
lhh hlhl
64 16
128 32
No.12
lhh hllh
4 1
No.13
8
2
(R12951)
(R12952)
Figure 1
Figure 2
DIP switch
Setting item Description
No. Setting
DS1-1
ON (OUT)
Cool/Heat
changeover
setting
It is used for changing over the unit which inputs the
COOL/HEAT switching command.
OFF (IN) (Factory
setting)
DS1-2
ON
Not used Do not change the factory settings.
OFF (Factory setting)