Haier 1U71S2SG1FA Service Manual page 230

AD71S2SM3FA AD90S2SM3FA AD105S2SM3FA
LED flash times
of indoor PCB
Wired controller display
LED4 LED3
0 1
0 2
0 4
0 7
0 8
0 12
0 13
0 14
Note:
1.The outdoor failure can also be indicated by the indoor unit, the checking method as follows: If the outdoor error
code is M (DECIMAL), the indoor unit's wired controller display will show the after converted hexadecimal code of
"M+20" (DECIMAL) , for example, if the outdoor error code is 2, the indoor unit wired controller display will flash the
error code 16 (2-2+20=22-change decimal 22 to hexadecimal code, get 16 )
2.To get much more details about the out door unit failure,please refer to the outdoor unit trouble shooting list.
3. For YR-E17, communication error between I.D.PCB and wired controller, 07 will flash in the main display not the
check display interface.
INDOOR UNIT TROUBLE SHOOTING
Contents of Malfunction
Malfunction of indoor unit
01 ambient temper-ature
sensor
Malfunction of indoor unit
02
piping temper-ature sensor
EEPROM wrong of indoor
04
PCB
Abnormal communi-cation
07 between indo-or and
outdoor units
Abnormal communi-cation
07*flashing between wired controlleer
and indoor unit
Malfunction of drain
0C
system
0D Zero cross sigal wrong
Indoor unit DC fan motor
0E
abnormal
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 wrong 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 or motor
blocked
227
Possible reasons
0150521239