Haier AU142AFBEA [301/365] Overload in heating cycle

Haier AU142AFBEA [301/365] Overload in heating cycle

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no

if failure disappear after

PCB is changed

indoor PCB failure

indoor/outdoor

temp. too high

modify indoor

motor or fan

capacitor

start

Is pipe temperature

sensor in good

condition?

Is filter or indoor

heat exchanger

dirty?

no

Replace indoor coil

sensor

cleaning

In heating mode, indoor motor

speed too low or stop?

10) Overload in heating cycle

yes

yes

yes

yes

no

no

Note: Float switch is close in normal state, when being activated, it is

open. Voltage between both ends is 0V when close, approximately 5V

when open.

no

Adjust bracket

Is float switch holder tinted

that float can't move, or too

close to pump motor that

interference arises?

Check if float switch is

in good condition with

multimeter

Replace float switch

if the drain pan is too

dirty to cause the invalid

float switch

if pump motor is

normal

clean drain pan

replace pump motor

Is drain pipe blocked?

yes

clean the drain pipe

and water pump

11) Fault in drain system

Confirm float switch failure

according to the fault code list

no

yes

yes

yes

no

no

no

yes

Replace indoor PCB

-301-

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