Haier HCFU-18CF03 Service Manual page 81

Condition for the PCB data:
1.Working ambient temperature: 10
2.Preserved ambient temperature: 20
3.Power supply:220VAC 50/60Hz voltage range:160V 250V
4.Precise of temperature control: 1
0010451167 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, if there is outdoor PCB, electrical heat: HEAT (control output 220VAC); if
there is not outdoor PCB, compressor control function(control output 220VAC).
P8 control external load, if there is outdoor PCB, health function: OXYGEN (control output
220VAC); if there is not outdoor PCB, 4-way valve control(control output 220VAC).
P9 control external load, if there is outdoor PCB, humidification: HUMI (control output 220VAC); if
there is not outdoor PCB, outdoor fan motor control(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=23K +-2.5% B25/50=4200K+-3% range: -40 80
Indoor coil temp. sensor: R25=10K +-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
CN9 input control no use
CN10 communication with fixed frequency single outdoor unit: (0~12VDC)
CN11 input signal, outdoor pressure switch control function (for the unit without outdoor PCB)
CN12 input signal, external alarm input: ALARM
conditioner stops work.
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
81
Commercial Air Conditioner
70 , relative humidity:30% 95%
80 relative humidity 30% 95%
Model: HCFU-18/28CF03
HCFU-18/28HF03
1-3 short circuit is normal, if cut off, air