Haier AE122FLAIA Сервис мануал онлайн [124/139] 619469

Yes

Yes Replace the mainboard.

Models with wired controller Models with wireless remote controller

Readout: E7 5 flashes of Timer light.

Description: Transmission error with electronic expansion valve driver.

Yes

Check if the sensor is properly

connected to the mainboard.

Reconnect

Check the sensor resistance

with a multimeter:

R25 =10KΩ+3%℃ ；

B(25/50)=3741K+70K

Replace the sensor

Check if the electric control of

indoor unit and the electric

control of expansion valve share

the same supply and if live wire

and null wire are properly

connected.

Check if the internal wiring of indoor unit and

expansion valve is properly done. For AE-

FCBKA mainboard, a jumper wire is used to

select the function of wire controller.

Check if the mainboard is noticeably damaged

and if the control panel works properly after

lacement.

Reconnect

Replace the

mainboard

Check if the PCB CN23 of AC series is short

connected.

Remove the

short wire

Commercial Air Conditioner

Model: AU28/342FHAIA,

AU522FIAKA, AU52,60NFIAKA

-120-

Models with wired controller Models with wireless remote controller

Readout: E5 6 flashes of Timer light.

Description: repeated indoor address or transmission error between indoor unit 846 chip and 808 chip.

What to do: Firstly correct the indoor unit address, if failure still exists, replace the mainboard.