Haier HBU-18HF03 Manual page 203

CN15——input signal, detecting water level of float switch （1-3 short circuit is normal, cut off shows that
level exceeds the limitation）.If float switch cuts off or occurs other failure, LED1 will flash 10 times.
CN16——input control, wiring port of central controller: REMOTE（1、RS485-B，2、RS485-A。 ）
CN17——output signal, output signal of failure alarm, control external load, 12V/ALM（1. control output
0VDC, 2. power supply 12VDC）
CN18——output signal (no use)
CN19——control external load, swing 1（1、16VDC，2、0VDC，3、0VDC，4、0VDC，5、0VDC.）.
CN20 ——control external load, swing 2（1、16VDC，2、0VDC，3、0VDC，4、0VDC，5、0VDC.）.
CN21——input signal, spring switch, CHECK（1、input signal of earthing, 2. power supply 0VDC）
CN22——short circuit means selecting single split communication type.( no use)
CN23——short circuit means selecting multi split communication type.( no use)
0010451167E PCB information – function selection（ON is 1, OFF is 0）
The standard condition for PCB in factory
SW1：4 bits are OFF
SW2：4 bits are OFF
SW3：4 bits are ON
SW4：2 bits are ON
SW5：4 bits are ON
SW1-SW2: used for indoor unit to set unit address from 1 to 128'
SW3-SW5: used for indoor unit to select different functions.(every dip switches are corresponding to J1-J10.
SW2-4——logistic relationship of control function（door card control and remote/ wired control）0 means
logistic relationship is "and", 1 means the later coming is preferential.
J1，SW3-1——function selection-control type: 1 means remote control, 0 means wired control.
J2，SW3-2——function selection-temperature compensation in heating mode: 1means "yes", 0means "no".
J3，SW3-3——function selection-outdoor communication: 1means "yes", 0means "no". This PCB must be 1.
J4，SW3-4——function selection-heat pump unit: 1means "heat pump", 0means "cooling only".
1/60——test in short circuit, but in operation short circuit mustn't be permitted.
CHECK——short spring switch control, it also can be used as switch of convertible type except for testing.
J5， SW4-1——function selection-elevating function: 1means "yes", 0 means "no".
J6，SW4-2——function selection –health function: 1means common (indoor fan motor running); 0 means
special (indoor, outdoor running).
J7，SW5-1——function selection –swing mode: 1 means common（simultaneous motor）, 0 means special
(swing motor).
J8，SW5-2——function selection – system combination: 1means fixed frequency single unit, 0 means fixed
frequency multi split.
J9，SW5-3——function selection –group control: 1 stands for the master unit (its address in wired controller
is 0), 0 stands for the slave units (the address should be set by the dip switch, their addresses only can be in the
range: 1~15)
J10，SW5-4——function selection –preset
0010451167E PCB information- control type
Control type selection between remote and wired: select by dip switch J1, SW3-1（1 means remote control；
0 means wired control.)
For remote control type, please use remote controller YR-H71, and a remote receiver is equipped with
indoor unit. For wired control type, wired controller YR-E12 will be used, 3-core shied wire is equipped with
Wiring diagram and PCB photo
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