Haier AC142ACNAC, Service Manual

Page: 53 / 91

Tr
ouble
Checkup result
Possible reasons
Corresponding solution
During h
eating progr
a
m
,
the compressor work while outdoor blo
w
ing fan do
es
not
Too high te
mperature of
indoor coil
pipe
causes overheat protection
It will automatically resto
re whe
n
the temperature of indoor coil pipe falls to 57
No output a
t collector of Q2 on
indoor board
Damaged Q2
Replace with a good Q2
No output of
relay JK8 o
n indoo
r
board
Damaged relay JK8 on indoor board
Replace with a good JK8
During h
eating progr
a
m
,
the compressor work while outdoor blo
w
ing fan do
es
not
A
vailable output of r
elays on
indoor board
Socket CN6 is not plugged well with connection cable
Plug the connection cable well
Curre
nt transformer
outputs
normally
Damaged rectificati
on diode D6-D7 etc.
Return to the
controlle
r
manufacturer for repair
T
ransformer CT1outputs
ormally
abn
Damaged transformer CT1
Replace with a good one
Inaccurate protection current
Adju
st the adjustable potentiometer
Abnormal
overcu
rrent
detection
Damaged major chip
Return to the
controlle
r
manufacturer for repair
With timing indicator a
nd
compressor indicator extinguishing
, the
operatio
n in
dicator flashes
every second
Damaged indoor temperature s
ensor
Replace with a good one
With timing
indicator and
compressor indicat
or
lighting, th
e operatio
n
indicator flashes eve
ry
second
Damage
d temperature sensor for indoor
coil pipe
Replace with a good one
No output at 13 pin of
2803 o
n
indoor board
Damaged 2803
Replace with a good 2803
N b
o output of relay JK6 on indoo
r
oard
Damaged relay JK4 on indoor board
Replace with a good JK4
A
va
ilable ou
tput of relay JK6 on
indoor board
Socket CN5 is not plugged w
ell with
connection cable
Plug the connection cable well
W
ater pu
mp indicator
flashes every secon
d
(trouble
for water
discharging)
Faulty conn
ection cabl
e to transmit
float
feedback signal
Replace with a good one
DIAGNOSTIC INFORMATION (TROUBLE SHOOTING)