Haier 1U71S2SG1FA Service Manual page 231

AD125S2SM3FA AD125S2SM3FA
INDOOR UNIT TROUBLE SHOOTING
LED flash times
of indoor PCB
LED4 LED3
0 1
0 2
0 4
0 7
0 8
0
12
13
0
0
14
15
0
17
0
0
18
0
19
M(≥1) N(≥0)
Note:
1.The outdoor failure can also be indicated by the indoor unit,the checking method as
following:outdoor unit error code=(M*10+N)-20.LED4 flash M times and LED3 flash N times .
2. LED4 is a yellow one on the indoor main control PCB,LED3 is a green one.3.To get much
more details about the out door unit failure,please refer to the outdoor unit trouble shooting
list.4.For YR-E17,communication error between indoor PCB and wired controller,
07 will flash in the main display interface instead of display at the check interface.
Wired
Contents of
controller
Malfunction
display
Malfunction of indoor
unit ambient temper-
01
ature sensor
Malfunction of indoor
unit piping temper-
02
ature sensor
EEPROM wrong of
04
indoor PCB
Abnormal communi-
07
cation between indo-
or and outdoor units
Abnormal communi-
07
cation between wired
*flashing
controller and indoor
unit
Malfunction of drain
0C
system
Zero cross sigal
0D
wrong
Abnormal communi-
cation between main
0E
control PCB & fan mo-
tor driver
0F Fan motor overcurrent fan motor current too high
DC voltage high or low DC voltage of the fan motor
11
12
F.M.D temperature high
13
Fan motor out of step
/
Error of the outdoor unit See note 1,
228
Possible reasons
Sensor disconected or brok-
,
en,or at wrong position,or
short circuit
Sensor disconected or brok-
,
en,or at wrong position,or
short circuit
EEPROM chip disconected
or broken or wrong program-
med,or PCB broken
Wrong connection,or the
wires be disconected or wro-
ng adress setting of indoor
unit or faulty power supply
or PCB hardware malfunction
Wrong connection or wired
controller broken,or PCB
hardware malfunction
Pump motor disconnected
or at wrong position,or the
float switch disconnected，
or at wrong position,or the
short circuit bridge disconne
ted
Zero cross sigal detected
wrong
communication wire discone-
cted or wrong conected or
PCB hardware malfunction
driver too high or too low
Fan motor driver over 95℃
wrong rotor location detected
2
0150519893