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Input/Output Function; Input / Output Setting Mode And Connector - Hitachi PSC-A64S Installation And Operation Manual

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INPUT/OUTPUT FUNCTION

14
5.
INPUT/OUTPUT FUNCTION
The central station has two input functions and two output functions as shown below.
1. Simultaneous Operation/Stoppage.
This function is for operating / stopping all the indoor units of the group, which is set by the central
station, by the external contact signal.
2. Simultaneous Operation.
This function is for operating all the indoor units of the group, which is set by the central station,
by the external pulse signal.
3. Simultaneous Stoppage.
This function is for stopping all the indoor units of the group, which is set by the central station, by
the external pulse signal.
4. Emergency Stop signal connection function.
This function is for stopping all the air conditioners connected with the central station by the
external emergency stop signal.
* When other central controller is used together with, even in the state of emergency stop, the
RUN/STOP operation by other central controllers is available.
5. Demand Control Function.
The peak-cut according to the electricity is available by the control of air conditioners with the
control signal from the demand control. The group set by the central station is operated by the
demand signal as follows.
Table A. Input / Output Setting Mode and Connector
Demand signal ON (1*)
Indoor Unit Stop
Demand 1
(Remote Control Inhibited)
Demand 2 (*3,*4)
COOL, DRY
Demand 3 (*3,*5)
HEAT
(Remote Control Inhibited)
*1: The control is performed every 15 seconds for the zone, which is subject to demand
control, in descending order of the zone Nº
*2: The control is performed every 15 seconds for the zone, which is subject to demand
control, in ascending order of the zone Nº
*3: During automatic cooling/heating operation, the activation of "Demand 1" is executed.
*4: For the group with the optional setting of fixing operation mode, the activation of "Demand
1" is executed.
*5: For the group with the optional setting of fixing operation mode or fixing set temperature,
the activation of "Demand 1" is executed.
6. Simultaneous Operation Output.
This function is for outputting signal outward in the case where there is any air conditioner in
operation in the group set by the central station.
FAN
STOP
Demand signal ON (2*)
Back to the former state of operation
The setting temperature is set as follows;
COOL, DRY...28
ºC
HEAT...20ºC

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