125
6.8 Diagnostic Code
LED flash times
of indoor PCB
Wired
controller
display
Contents of
Malfunction
Possible reasons
LED5
LED1
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 faulty PCB or slave unit
malfunction in MAXI system
0
0
0
0
0
7
8
12
13
14
07
/
0C
0D
0E
Abnormal communi-
cation between wired
controller and indoor
unit
Wrong connection or wired
controller broken,or PCB
faulty
Malfunction of drain
system
,
Zero cross sigal
wrong
Zero cross sigal detected
wrong
DC Fan motor disconnected
or DC Fan broken or circuit
broken
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.
INDOOR UNIT TROUBLE SHOOTING
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
0150515407
Indoor unit DC fan
motor abnormal
4MXC2309BF0W0AA 4MXC2312BF0W0AA 4MXC2318BF0W0AA
