Haier AU55NFIAIA Service Manual page 54

Press "No. 6" button, 6 will flash, then press "SET" button at indoor unit. When a sound "du" of
set No. 6
indoor unit is heard, unit 6 is set, then press "READ" to confirm if the unit number is right.
unit
Press button 6 and at the same time in 2 seconds press button 1, then loosen them
set No. 7
simultaneously. The LCD will display "7", which stands for selecting unit 7. And then press button
unit
"set", you can set unit 7.Then press "READ" to confirm if the unit number is right.
Press button 6 and at the same time in 2 seconds press button 2, then loosen them
set No. 8
simultaneously. The LCD will display "8", which stands for selecting unit 8. And then press button
unit
"set", you can set unit 8.Then press "READ" to confirm if the unit number is right.
lock unit no function
number
Note: When setting unit number, if indoor unit sounds "du du", which shows this number has exixted in the
system, you should set another unit number.
Some information for the colorful screen wall mounted type unit:
1.For the unit produced before May, 04, the address setting method has been changed to
use dial switch, which is as the same as that of the duct unit and ceiling concealed type unit.
The address-setting controller is invalid. When out of factory, the address is set as No. 3.
There are maximum 8 indoor units according to the communication method.
But please pay attention that PCB of this unit produced after May, 04 has been changed
back to the state whose address will be set by address-setting controller.
2.The infrared controller is YR-H71, and the emission code should be code B. Some buttons
will be useless; the whole function is as the same as YR-C04. The detailed information
please refers to the operation manual.
3.The unit has auto restart function. Press "SWING" button 10 times within 5 seconds, after
the buzzer sounds 4 times, auto restart function will be activated. Press "SWING" button 10
times within 5 seconds again, after the buzzer sounds 2 times, this function will be
cancelled.
4.This unit has manual defrosting function. In heating mode with high fan speed, at 30
degrees, press "SWING" button 8 times in 5 seconds, after the buzzer sounds 3 times, this
function is activated. (used in debugging)
5.The unit has temperature compensation function in heating mode. When out of factory,
temperature compensation is set as 4 degrees. Cut off the wire of CN4, the compensation
will be cancelled.
6.CN3 is short wire for short time function. CN4 is short wire for temperature compensation.
CN6 is testing port for serial communication.
Commercial Air Conditioner
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Model: AU55NFIAIA