Setting Of The Optional Signals - Hitachi RAS-2-HVNP Service Manual

6. Optional functions
6.1.3 Setting of the optional signals
The optional signals of the outdoor unit are set up from the
PCB of the outdoor unit and can be selected by pushing
switches PSW1, PSW2 and PSW3.
N O T E
Before setting the optional signals, must be complied
the following conditions:
• Outdoor unit must be stopped
• Check mode must not be selected
• External optional signal must not be connected
If the initial setting has to be modified, the following instruc-
tions must be followed:
1 Set pin 6 of DSW2 to ON. Set pin 4 of DSW1 to ON.
Because of these settings, the input/output signals se-
lection mode becomes available and the following indi-
cation appears on the 7-segment display.
i 1
Input/output
terminal
This example indicates that function number 1 "Fixing
the heating mode" is set at input 1.
2 By pressing the push switches PSW2 and PSW3, it can
be changed the input/output terminal name. (See the
flowchart show in the side).
3 By pressing the push switch PSW1, it can be changed
the function number. (See the flowchart show in the
side)
4 After selecting the function number, return pin 6 of
DSW2 to OFF position and pin 4 of DSW1 to OFF.
The selected contents are memorized in the outdoor unit
printed circuit board and the function selection mode is
stopped. The memorized data is maintained even power
source lines are disconnected. The connecting details of
each function are described, and the required parts are also
indicated in the section
Description of the optional signals
on this chapter.
150
SMGB0079 rev.0 - 01/2013
Input setting 1
CN1, 1-2
SET*
Input setting 2
CN1, 2-3
SET*
Input setting 3
CN2, 1-2
1
SET*
Function
number
Output setting
1 CN7, 1-2
SET*
Output setting
2 CN7, 1-3
SET*
(*) Set
1 1
PSW1
PSW2 PSW3
0 ~ 10
2 2
PSW1
PSW2 PSW3
0 ~ 10
3 3
PSW1
PSW2 PSW3
0 ~ 10
o1 1
PSW1
PSW2 PSW3
0 ~ 10
o2 2
PSW1
PSW2 PSW3
0 ~ 10
Factory setting
Factory setting
Factory setting
Factory setting
Factory setting