Hitachi EXV-serie Installations- Und Betriebshandbuch Seite 26

ELECTRICAL WIRING
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PCB2 settings
DSW1: Optional functions
Factory setting
Pins 1 and 2: Capacity control setting
Pins 3 and 4: Duty signal setting (*1)
Pin 5: Duty mode selection (*2)
Pin 6: Thermo ON/OFF external input enabled (*3)
Pin 7: Group controller (*4)
Pin 8: Not used
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N O T E
• (*1): If external duty control is selected (pins 1-2), then check the proper selection for the duty signal (pins 3-4).
• (*2): If external duty control is selected (pins 1-2-3-4), then turn pin 5 OFF for absolute reference or ON for incremental reference
• (*3): The thermo ON/OFF control can be driven externally by an input signal connected to the CN3 socket of the PCB1. The pin 6 of DSW1 in PCB2
must be switched on, and then the "i1" input of CN3 is automatically set for thermo ON/OFF control. The setting of "i2" input is kept as set on the
remote controller.
• (*4) Pin 7 : ON: group controller OFF: individual controller
• Please refer to the Service Manual of HITACHI Indoor Units for further information about the setting and connection of the auxiliary inputs.
DSW2: End resistance
No setting is required.
All units
1 2
18 PMML0293A rev.2 - 08/2016
Discharge air control (Control by outlet temperature)
Indoor air control (Control by inlet temperature)
External duty control (*1)
4~20 mA (Internal 100Ω load impedance)
0~10 V (Internal 47kΩ pull-down resistor)
0~5 V (Internal 47kΩ pull-down resistor)
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8