Haier HBU-18HF03 Manual page 204

indoor unit.
Door card control: controls ON/OFF, the start up setting will comply with last time request memorized
according to condition memorize function. Its difference with emergency switch of convertible type unit lies: the
emergency switch control will perform in the condition: 24degrees, auto fan speed in auto mode.
The function combination between door card and remote/wired control type: select by dip switch: SW2-4（0
means "and", 1 means later coming is preferential.）
Dip switch position in wired control type: Only one indoor unit of all indoor units connected with wired
controller is the master unit, whose address is 0, function selection switch （J9， SW5-3） is 1. The others are slave
units, and the quantity can be 0~15, whose addresses are（SW1:1~4）from 1 ~15, and cannot repeat.
Wiring request in wired control type: the wired controller ports A-B-C are connected with indoor port CN5
（1-2-3） through 3-core shield wire. Requirements:
1. Port A only connects with either of indoor port CN5（1）
2. Port B connects with port CN5 (2) of all indoor units.
3. Port C connects with port CN5 (3) of all indoor units.
Dip switch position in central control type: the addresses （SW1:1~4；SW2:1~4）of indoor units connected
with central controller can not repeat. In principle, they should be in the order from small to big.
Wiring request in central control type: port A-B is connected with indoor port CN16（A-B）through 2-core
shield wire. Requirements:
1. Port A connects with port CN16（A）of all indoor units.
2. Port B connects with port CN16（B）of all indoor units.
When only use remote control type, please select remote control unit, and install according to installation
manual, there is no other special request.
When only use wired control type, please select wired control unit, and install according to installation
manual. When control multi indoor units, take care the requirements of dip switch and wiring, there is no other
special request.
When only use central control type, please firstly install according to air conditioner requests and set the
dipswitch, there is no other special request.
When central control type（128×）and remote control type are used simultaneously, set the dip switch
according to central control type, there is no other special request.
When central control type （128×） and wired control type （16×） are used simultaneously, max. indoor units
sets: 128×16 can be controller. Address setting of central controller can be met firstly, and then modulate the
address setting of slave unit wired controlled.
LED in indoor PCB:
1. LED1：is the state lamp for remote receiver as well as failure lamp. If indoor unit is normal, LED1 is on, or if
failure occurs, LED1 flashes regularly, and you can adjust failure type according to the flash times.
2. LED2：is used for multi split units as communication lamp. If communication between indoor and outdoor is
normal, LED2 will be on.
3. LED3：is used for single split units as communication lamp. If communication between indoor and outdoor is
normal, LED3 will be on.
4. LED4、LED5：is the lamp that shows the data receiving or sending between wired controller and PCB, If
LED4、LED5 be on in turn, communication between wired controller and PCB is normal.
Wiring diagram and PCB photo
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