Hitachi PC-LH3A - Sending Commands from Controller; LCD (Liquid Crystal Display) Indication

9. Simultaneous Operation of Multiple Indoor Units
Do not perform this operation in case that the
multiple indoor units are installed in different
rooms separately. It may happen that some indoor
units remain unchanged.
The multiple indoor units (Max. 16 units) can be started and
stopped simultaneously by one controller.
Perform this operation only in case that multiple indoor
units are installed in a room. The detail for setting method
shall be referred to the installation manual of the indoor
unit.
Control Cable between
Indoor Units
Control Example of Simultaneous Operation of Multiple Units
Indoor Unit
Controller
4) Operate the Test Run by pointing the transmitter towards the receiver of the indoor unit and press the
“ RUN/STOP” switch. When the commands are received by the indoor unit, the “ ” lamp (yellow)
of the receiver will come on briey. Check the commands are received well and the mode selected 3) is
set correctly. In the test run mode, the red lamp (RUN) of the receiver is turned ON and the green lamp
(TIMER) ashes (0.5 seconds ON 0.5 seconds OFF) (*2). And then set off timer for 2 hours.
NOTES:
1. In the case that the “
” lamp (yellow) does not turn ON, the controls may not have reached the
receiver. Send the commands again.
2. (*2) In the case of RPK model, “TIMER” lamp is turned ON without ashing.
5) Adjust the angle of the air louver as follows.
The air louver has a mechanism for the auto-swing function.
Do not move the louver by hand forcefully.
(1) Select the FAN mode by pressing the “MODE” switch.
(2) Set the louver angle by pressing the “LOUVER” switch.
The louver direction is changed as follows. (For heating and fan operation)
6) Stop the Test Run
(1) Test Run is stopped after 2 hours automatically.
(2) Test Run is stopped by pressing “
RUN/STOP” switch again. To complete Test Run, cancel the
remained timer indication by pressing the “CANCEL” switch.
After Test Run is nished, check that the red lamp (RUN) and the green lamp (TIMER) are turned OFF.
LCD Indication
P5416537, 2015 Printed in Japan
© 2015 Johnson Controls-Hitachi Air Conditioning Technology (Hong Kong) Ltd.