Haier HBU-18HF03 Manual page 202

Condition for the PCB data:
1.Working ambient temperature:－10℃～70℃, relative humidity:30%～95%
2.Preserved ambient temperature:－20℃～80℃，relative humidity：30%～95%
3.Power supply:220VAC、50/60Hz，voltage range:160V～250V
4.Precise of temperature control:±1℃
0010451167E PCB information – port and definition
P1——connect to external power supply, live line: L (220VAC)
P2——connect to external power supply, neutral line: N (0VAC)
P3、4、5、6——control external load, neutral line: N1、N2、N3、N4(0VAC)
P7——control external load, electrical heat: HEAT (control output 220VAC)
P8——control external load, health function: OXYGEN (control output 220VAC)
P9——control external load, humidification: HUMI (control output 220VAC)
P10——control external load, SWING(control output 220VAC)
P11——control external load, WATER PUMP(control output 220VAC)
P12——control external load, indoor fan motor low speed: L(control output 220VAC)
P13——control external load, indoor fan motor mid speed: M(control output 220VAC)
P14——control external load, indoor fan motor high speed: H(control output 220VAC)
P15——communication with fixed frequency single outdoor unit: COMM(0~220VAC)
P16——input control, signal live line: L'(220VAC)
P17——input control, signal neutral line: N'(0VAC)
CN1——input port of transformer (220VAC)
CN2——input port 1 of transformer (no use)
CN3——input port 2 of transformer (no use)
CN4——input port 3 of transformer (1-2、14VAC，3-4、12VAC)
CN5——input control, connecting port to wired controller: CONTROLLER（three bits: 1. power supply:
12VAC, 2. power supply: 0VAC, 3. communication: COMM.）.
CN6——input control, ambient temp.-coil temp. sensor connecting port: ROOM/PIPE（1-2、ROOM，3-4、
PIPE。 ）
Indoor ambient temp. sensor: R25=23KΩ+-2.5%，B25/50=4200K+-3%，range:（-40，80）
Indoor coil temp. sensor: R25=10KΩ+-3%，B25/50=3700K+-3%，range:（-20，90）
CN7——control external load, fresh air control: FRESH（1. blank, 2. power supply 0VDC, 3. control output:
12VDC.）
CN8——input signal: FREEZE（no use）
CN9——input control（no use）
CN10——communication with fixed frequency single outdoor unit: (0~12VDC)
CN11——input signal, door switch: DOOR（1-2 short circuit is normal, cut off P8 output）
CN12——input signal, external alarm input: ALARM（1-3 short circuit is normal, if cut off, air conditioner
stops work.）
Note: For convertible type, cassette type, duct type units, CN11 and CN12 must be in short circuit, or
PCB will display failure information.
CN13——input signal, wiring port of remote receiver board: RECEIVE BOARD（1. power supply 5VDC, 2.
power supply 0VDC, 3. remote signal, 4. signal output of running lamp 0VDC, 5. signal output of timer lamp
0VDC,6. signal output of power lamp 0VDC, 7. signal output of water pump running lamp 0VDC）
CN14——control external load, auto elevating function （1. signal of door switch close, 2. output of
elevating direction control 0VDC, 3. output of elevating power control 0VDC, 4. power supply 12VDC）
Wiring diagram and PCB photo
-202-