Hitachi PC-ARF Technical Catalogue page 247

5 Centralised remote controls
PSC-A64GT
Definitions
• Group (Remote Control Switch Group):
The minimum operation unit controlled by one central station. 1 remote control group is considered as 1 group, and the
same setting is applied to the entire group. A maximum of 64 groups (organized as 4 blocks with 16 groups each) can be
controlled with one central station.
• Block:
An operation unit composed of several groups. Maximum of 16 groups can be registered within one block. Maximum of 4
blocks can be controlled by one central station.
• Main Unit:
The representative unit of the remote control group. The central station transmits control orders to this representative
unit.
• Sub Unit:
Indoor units other than the main unit of the remote control group.
PSC-A64GT
Main Unit Registration
• Only one unit can be registered as the main unit of a group. Thus, duplicate registration of the main unit is not possi-
ble inside a group. If the unit registered as the main unit has to be changed for some reason, then cancel the current
register of main unit before registering the new main unit again.
• When mixing indoor units with automatic swing louvre and indoor units with automatic swing louvre together in the
same remote control group, an indoor unit with auto-louvre shall be registered as the main unit of the group. If an
indoor unit without auto-louvre is registered as the main unit, then the auto-louvre setting cannot be applied for the
entire group.
• When registering a group which has no transmission wiring, the indoor unit without a remote control switch cannot be
registered as the main unit.
Sub Unit Registration
• A maximum of 15 sub units can be registered in the same remote group with the main unit (when applying the control
pattern of 2 blocks with 16 groups each).
• In case of changing the registration of an indoor unit which is already registered as a sub unit, cancel the register set-
tings first, and then proceed to the new register.
• If tap "Enter" at the name registration, the name of the group or the block will be indicated in the two lines. 10 letters
can be input in each line. (Total 20 letters)
231
TCGB0106 rev.0 - 12/2014
Without
transmission
wiring
Group
Group
Block
One remote control switch One unit is also handled
equals to one group as one group
Group Group
Group
Group
Block
Without remote control switch, one
indoor unit equals to one group
Outdoor unit
Indoor unit
Remote control
switch
5