Trane 4TXM2318BF300AA Service Manual page 130

4MXE2309BF0W0AA 4MXE2312BF0W0AA
INDOOR UNIT TROUBLE SHOOTING
LED flash times
of indoor PCB
LED6 LED1
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 follo-
ws: LED6 flash times stands for ten's place,and LED1 flash times stands for one's place,
use this ten-digit number minus 20,then will get the outdoor error code.For example,if the
outdoor error code is 15,LED6 will flash 3 times firstly,two seconds later,LED1 will flash 5
times , and four seconds later the process will repeat again.
2.LED6 is a green 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.
Contents of
Malfunction
display Malfunction
Malfunction of indoor
unit ambient temper-
E1
ature sensor
Malfunction of indoor
unit piping temper-
E2
ature sensor
EEPROM w rong of
E4
indoor PCB
Abnormal communi-
cation between indo-
E7
or and outdoor units
Abnormal communi-
cation between wired
E8
controller and indoor
unit
Malfunction of drain
E10
system
Zero cross sigal
C1
wrong
Indoor unit DC fan
E14
motor abnormal
Possible reasons
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
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 disconected，
or DC Fan broken or circuit
broken
128
or brok-
,
or brok-
,
,
0150533331