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