Hitachi RCI-1.0FSN3 Service Manual page 178

4 Electrical wiring
PCB2 settings
DSW1: Optional functions
Factory setting
Switch 1 and 2: Capacity control setting
Switch 3 and 4: Duty signal setting (*1)
Switch 5: Not used
Switch 6: Thermo ON/OFF external input enabled (*2)
Switch 7: Common operation of remote control switch
Switch 8: Not used
(*1): If external duty control is selected (switch 1-2), check the proper selection for the duty signal (switch 3-4).
(*2): The thermo ON/OFF control can be driven externally by an input signal connected to the CN3 socket of the
PCB1. The switch 6 of DSW1 in PCB2 must be switched on, then the input "i1" of CN3 is automatically set for
thermo ON/OFF control. The setting of input "i2" is kept as set on the remote controller.
C A U T I O N
If there is an indoor unit connected in the same RCS line as DX-Interface EXV-(2.0-10.0)E1 or KPI-(E/H/X)3E, then
pin 7 must be ON to disable the power supply to RCS line. If there is no indoor unit connected to the same RCS
line but there are more than one DX-Interface EXV-(2.0-10.0)E1 or KPI-(E/H/X)3E, then only one DX-Interface EXV-
(2.0-10.0)E1 or KPI-(E/H/X)3E should have pin 7 OFF while all other units must have pin 7 set to ON. Failure to
perform this setting correctly will result in bad communication and can even cause physical damage to the PCB.
DSW2: End resistance
No setting is required.
166
SMGB0077 rev.0 - 01/2013
Discharge air control (Control by outlet temperature)
Indoor air control (Control by inlet temperature)
External duty control (*1)
4~20 mA
0~10 V
0~5 V
All units
ON
1 2
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8