Haier HCFU-18CF03 Service Manual page 82

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
elevating direction control 0VDC, 3. output of elevating power control 0VDC, 4. power supply 12VDC
CN15 input signal, detecting water level of float switch
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.
CN23 short circuit means selecting multi split communication type.
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Commercial Air Conditioner
Model: HCFU-18/28CF03
HCFU-18/28HF03
1. signal of door switch close, 2. output of
1-3 short circuit is normal, cut off shows