INDOOR UNIT TROUBLE SHOOTING
AD71S2SM7FA/AD100S2SM7FA/AD125S2SM7FA/AD140S2SM7FA
Troubleshooting
LED flash times
of indoor PCB
Contents of
Malfunction
Possible reasons
LED4
LED3
0
0
0
1
2
4
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 faulty PCB or
sub
unit
malfunction in MAXI system
0
0
0
0
0
7
8
12
13
14
Abnormal communi-
cation between wired
controll
e
r and indoor
Wrong connection or wired
controller broken,or PCB
faulty
Malfunction of drain
system
Zero cross sigal
wrong
Zero cross sigal detected
wrong
Note:
1.The outdoor failure can also be indicated by the indoor unit,the checking method as follo-
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 failure,ple ase refer to
the outdoor unit trouble shooting list.
Sensor disconected
,
or brok-
en,or at wrong position,or
short circuit
Pump motor disconnected
or at wrong position,or the
float swit
,
ch disconnected
,
or at wrong position,or the
DC Fan motor disconnected
or DC Fan broken or circuit
broken or motor blocked
short circuit bridge disconne
ted
Indoor unit DC fan
motor abnormal
Wired
controller
display
01
02
04
07
0C
0D
0E
unit
07
flashing
*
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 .
12
Содержание AD100S2SM7FA
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