Haier AD90S2SM3FA Manuel D'installation page 18

Troubleshooting
INDOOR UNIT TROUBLE SHOOTING
AD90/105S2SM3FA,AD90/105S2SM4FA
LED flash times
of indoor PCB
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 th
ws:
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
trouble shooting list.3.For YR-E17,communication error between I.D. PCB and wired
controller, 07 will flash in the main display interface not the check display interface.
Wired
Contents of
controller
Malfunction
display
Malfunction of indoor
01
unit ambient temper-
ature sensor
Malfunction of indoor
02
unit piping temper-
ature sensor
EEPROM wrong of
04
indoor PCB
Abnormal communi-
07
cation between indo-
or and outdoor units
Abnormal communi-
07
cation between wired
controlle
*flashing
unit
Malfunction of drain
0C
system
Zero cross sigal
0D
wrong
Indoor unit DC fan
0E
motor abnormal
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
e
r and indoor
f f aulty
Pump motor disconnected
or at wrong position,or the
float swit
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
h e indo o o o r un n it,the checking method as follo-
failure,please refer to the outdoor unit
2
Possible reasons
or brok-
,
or brok-
,
ch disconnected，
,