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Hitachi PSC-A64S Installation And Operation Manual page 11

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GROUP SETTING
10
ATTENTION:
- When the indication of Ref. Nº is "- -", the indication of I.U. Add. is also "- -". In such a case,
I.U. Add. can not be changed although the " " (TEMP) switch is depressed.
- Ref. Nº with no indoor unit connected and I.U. Add. not connected are not indicated.
- The indoor unit already set as the master unit is not indicated.
e. Setting Procedure
Depress the "RUN/STOP" switch after selecting
indoor unit, the indicated unit is set as the master
unit, and the " " and "SET" indications appear.
The " " indicator of zone turns ON when there is
one or more group with the master unit set.
f. Perform the master unit setting procedure b. to e.
for each group and zone.
g. After completion of the master unit setting,
change the mode to the standard state by
depressing "RESET" switch.
CAUTION:
- When there is any group in operation (with "RUN" indicator ON), the "CHECK" mode is not
available.
- Only one indoor unit can be set as the master unit in one group. Other indoor unit can not be set
as the master unit for the group with the master unit set already. For setting the master unit as
the master unit for another group, cancel the present master unit setting and perform the
setting for another group.
- In case that there are indoor units with auto-louver and indoor units without auto-louver in the
same group, set the indoor unit with auto-louver as the master unit. If the indoor unit without
auto-louver is set as the master unit, the auto-louver setting is not available for all the units of
the group.
- When setting the remote control switch group without transmission line between indoor units,
the indoor unit connected with the remote control switch shall be set as master unit.
4.2.3. CANCELLATION OF MASTER UNIT SETTING
a. Screen change for cancellation of Master Unit
cetting keep depressing the "CHECK" switch for 3
seconds during all the indoor unit is stopped (with
"RUN" indicator OFF). The "CHECK" indicator
turns ON, and it shows the state is changed to the
CHECK mode and "1" (master unit setting mode)
turns ON at the 7-segment indicator for checking.
b. Select of Zone to be canceled depress the "ZONE"
switch and the "GROUP"
the zone and the group to cancel.
c. Cancel the slave unit setting.
Depress the "RUN/STOP" switch and the master
unit is canceled.The "SET" indicator and the " "
indicators of group turn OFF.
The " " indicators of zone turns OFF when there is
one or more group with the master unit set.
d. Perform the cancellation of master unit setting
procedure b and c for each zone and group.
e. After completion of canceling the master unit
setting, change the mode to the standard state by
depressing "RESET" switch.
switch, and select

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