Johnson Controls YJHJXH024BARR-FX, Service Manual

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Function and Control
Domestic Air Conditioner
21
heating signal to the outdoor system. Meanwhile, you can fix the indoor system at high speed mode,
the location of the airflow directin board can be switched to the maximal position.
c. Quitting condition: The fixed frequency heating can be quitted after receiving the remote signal, and
the system will enter the remote setting status.
5.1.19 Time cutting function:
connect the test program terminal on the mainboard after connecting the system to the power circuit.
The CPU of the main control will be 60 times faster.
5.1.20 Display function
When the system starts up or power on, the background and the LED will be fully lighted for 3 seconds.
Then the LED displays the mode you have set.
5.1.20.1 Three-color background
The multi-color indicator is not lighted when the system is off. The mode-switching will change the
indicator colors. Red color is for heating mode, blue for cooling, water color for demoisturing, white for
automatic mode, pink for airflow sending, green for health mode and yellow green for air refreshing.
The colors health, refreshing colors are preferred to the mode colors. If different status exist at the
same time, then the last set color will be shown. The lighting key of the control board can turn on or off
the display.
5.1.20.2 LED display
*Set timing to display timing signs, set dormant mode to display dormant sign.(The dormant signs will
be shown on the G series panels.), set health mode to display health sign, set new airflow mode to
display new airflow sign and set violet disinfection to display health sign.
*Set auto, heating, demoisturing, heating to display the relative signs. When you use a remote control
to switch cooling, demoisturing and heating modes, the set temperature will be shown and the screen
board will return to the room temperature 5 seconds later. If you choose the airflow sending mode, the
screen board will show the room temperature directly.
*If the system is under malfunction status, the display will show the malfunction code. Please refer to
the malfunction list.
5.2 The control system of outdoor unit
5.2.1
˖
The operation frequency of outdoor unit and its control
5.2.1.1 ˖ The operation frequency control of compressor
The operation frequency scope of compressor
˖
Mode Minimun operation frequency Maximun operation frequency
Heating 20Hz 100Hz
Refrigeration 20Hz 90Hz
5.2.1.2
˖
The starting of compressor
When the compressor is started for the first time, it must be kept under the conditions of
YJHJZH024BARRAFX -SM