Haier AS26TB1HRA Service Manual page 43

(A)
If the voltage is a constant value
of 0V DC to 5V DC.Or the voltage
between Communication line(red ) and N(white
line) is not close to18V
DC when only indoor charged.
NO
Test the outdoor power is
supply 230VAC with a
multimeter when indoor and
outdoor are charged.
YES
LED2 light of the outdoor
YES
Led1 light
NO
Remove fan motor after
switch off the power and restart
the a/c ,the led 1 becomes light
or flash.
NO
Test the fan motor terminal resistance
between pin 310V and 0V,or pin15V and 0V
of CN22 are close to 0mΩ with a multimeter
after switch off the power .
The indoor mainboard is
YES
damaged; replace it with a
new one.
NO
Check the cable
between outdoor
and power
The module pcb
NO
is damaged,
replace it with a
new one.
Measure the voltage
Between 3 and 4 of IC9 on the
YES
Outdoor mainboard with a Multimete .
The voltage is a constant value of 0V
DC to 5V DC
NO
Fan motor is
YES
damaged，replace it
with a new one.
NO
YES
40
The outdoor pcb is
YES
damaged, replace
it with a new one.
The outdoor pcb is
well,and then check
the cable
Remove the connection cable
between CN23 of outdoor pcb and
CN10 of module pcb,The led1
becomes light or flash.
NO
The outdoor pcb is
damaged, replace it
with a new one.
Service diagnosis
The module pcb is
YES
damaged, replace it
with a new one.
Domestic air conditioner