Diagnostic Code - Haier 1U71S2SG1FA Service Manual

3. Diagnostic Code

AB25S2SC1FA AB35S2SC1FA AB50S2SC1FA
INDOOR UNIT TROUBLE SHOOTING
LED flash times
of indoor PCB
LED5
0
0
0
0
0
0
0
0
Note:
1.The outdoor failure can also be indicated by the indoor unit,the checking method as follo-
ws: LED5 flash times stands for tens digit,and LED1 flash times stands for units digit,
use this bidigitate figure minus 20,then will get the outdoor error code.For example,if the
outdoor error code is 15,LED5 will flash 3 times firstly,two seconds later,LED1 will flash 5
times , and four seconds later the process will repeat again.
2.LED5 is a red one on the indoor PCB,LED1 is a yellow one.
3.To get much more details about the out door unit failure,please refer to
the outdoor unit trouble shooting list.
Wired
Contents of
controller
Malfunction
display
LED1
Malfunction of indoor
unit ambient temper-
1
01
ature sensor
Malfunction of indoor
2
unit piping temper-
02
ature sensor
EEPROM wrong of
4
04
indoor PCB
Abnormal communi-
cation between indo-
7
07
or and outdoor units
Abnormal communi-
cation between wired
8
/
controller and indoor
unit
Malfunction of drain
12
0C
system
Zero cross sigal
13 0D
wrong
Indoor unit DC fan
14 0E
motor abnormal
Possible reasons
Sensor disconected
en,or at wrong position,or
short circuit
Sensor disconected
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 faulty PCB or slave unit
malfunction in MAXI system
Wrong connection or wired
controller broken,or PCB
faulty
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
DC Fan motor disconnected
or DC Fan broken or circuit
broken
223
or brok-
,
or brok-
,
,
0150515407