Hitachi PSC-A1T - Page 295

6 Demand Function Rotation
When the demand control signal is ON, the operation starting target group for “Demand Function” is selected randomly.
After that, “Demand Function” operation is started from selected group to the small numbered group at every intervals for
15 seconds as shown below.
Example.
In the case of 6 groups
Group 5
Group 4 Group 3 Group 2 Group 1 Group 6
Selected Group
The numbered group arrangement is shown below.
Monitor 1 (Group) Monitor 2 (Block)
Block 1 Block 2 Block 3 Block 4
Group 1
Group 3
Group 5
Group 7
Group 9
Group 2
Group 4
Group 6
Group 8
Group 16
Group 10
Group 12
Group 14
Group 15
Group 11
Group 13
Group 1
Group 3
Group 5
Group 7
Group 9
Group 2
Group 4
Group 6
Group 8
Group 16
Group 10
Group 12
Group 14
Group 15
Group 11
Group 13
Group 1
Group 3
Group 5
Group 7
Group 9
Group 2
Group 4
Group 6
Group 8
Group 16
Group 10
Group 12
Group 14
Group 15
Group 11
Group 13
Group 1
Group 3
Group 5
Group 7
Group 9
Group 2
Group 4
Group 6
Group 8
Group 16
Group 10
Group 12
Group 14
Group 15
Group 11
Group 13
All Groups Block 1 Block 2 Block 3 Block 4
Group 5
Group 9
Group 13
Group 2
Group 6
Group 10
Group 14
Group 3
Group 7
Group 11
Group 15
Group 4
Group 8
Group 12
Group 16
Group 1
Numbered Group Arrangement
External Output Function
1 All Run Output
External output for indoor unit operation signal in the target group. The operation signal outputs even if one indoor unit in
the target group is operated.
2 External Output Alarm
External output alarm signal for indoor unit in the target group. The alarm signal outputs even if one indoor unit abnor-
mality occurs in the target group.
External Input/Output Terminals Specication
Input Terminal:
Non-voltage contact (normal open) for demand signal Input DC12V, 10 mmA.
The switching of the contact is available.
Pulse width is 300 mm or more for pulse signal input.
Output Terminal:
Contact (voltage is applied) for signal Output DC12V
Recommended Relay: MY Relay manufactured by Omron Corporation
(Do not use a diode built-in type.)
5 Centralised remote controls
PSC-A64GT
TCGB0106 rev.0 - 12/2014
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