Operation System With Two Remote Control Switches; Optional Function Setting - Hitachi FSG Series Service Manual

4
OPTIONAL FUNCTION
14
False Number of Connected Units is Indicated
3. When the indicated number of connected units is
smaller than the actual number or zero, presumable
causes are as follows:
The power source of some units is not turned ON.
Incorrect setting of unit numbers was performed.
Control wires between units or remote control switch
were incorrectly connected regarding polarity and
order.
Ending of Test Running Mode
e. When the confirmation of the number of connected
units and the wiring-checking are finished, end the test
running mode by depressing the "RESET" switch.
4.3.3.
OPERATION SYSTEM WITH TWO
REMOTE CONTROL SWITCHES
n By installing an additional remote control switch, a
maximum of 16 units can be controlled from two
different locations.
Main and Sub Control Switch
Determine one of the two remote control switches to be the
main switch and the other as a sub switch. Cut the jumper
wire JP01 in the sub remote control switch as shown in the
right figure.
Altering Method to Sub Control Switch
Cut Jumper Wire JP01 with Nippers
Liquid Crystal Display
n Wiring Method
a. Perform wiring between units as shown in the following
figure: (Three Unit Case)
Connecting Cable between Units (3- Core or 2- Wire)
CN12 CN12
(Yellow) (Yellow)
CN13 CN13
(Yellow) (Yellow)
Connect the main remote control
switch to CN13 (or CN12) and the
sub-remote control switch to
Remote
CN12 (or CN13).
Control
Switch
Main Switch
b. Decide the number of units. The method should be the
same as in "Simultaneous Indoor Unit Operation with
One Remote Control Switch".
n Checking the Main and Sub Remote Control
Switches
Press the "CHECK" switch and the "RESET" switch
simultaneously for more than 3 seconds, the main remote
control switch is changed to the field setting mode, and the
sub remote control switch is changed to the check mode.
&
CAUTION:
4.3.4.
The remote control switch is changed to the optional setting
mode by the following procedures.
n Field Setting Mode
Check to ensure that the unit is stopped, press the
"CHECK" switch and the "RESET" switch on the remote
control switch simultaneously more than 3 seconds, and
the remote control switch is changed to the field setting
mode. When the remote control switch is at the field setting
mode, the "SERVICE" is indicated and the "01" is flickers
below the "SERVICE" indication.
n Optional Setting Mode
At the field setting mode as described in Field Setting
Mode, press the "TEMP D" switch or the "TEMP ¶ " switch
and the number flickering below the "SERVICE" indication
is changed (01 <=> 02). Set the flickering number at "01",
leave this condition for 7 seconds or press the "CHECK"
switch, and the remote control switch is changed to the
optional setting mode.
CN12
(Yellow)
CN13
(Yellow)
Remote
Control
Switch
Sub-Switch
When a main remote control switch malfunctions,
unit operation stops. Units cannot be operated
with only a sub-remote control switch.
When a main switch and a sub-switch are
simultaneously operated, the units will operate
according to either one of the modes after 30
seconds.

OPTIONAL FUNCTION SETTING