Trane 4TXM2318BF300AA - Page 129

127
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 slave unit
malfunction in MAXI system
0
0
0
0
0
7
8
12
13
14
Abnormal communi-
cation between wired
controll
e
e
r and indoor
Wrong connection or wired
controller broken,or PCB
f
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 t
h
he ind
o
o
o
or u
n
nit,the checking method as follo-
ws:
If the outdoor error code is M(DECIMAL)，the indoor unit’s wired controller display will
m
2.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
0150521239
Indoor unit DC fan
motor abnormal
Wired
controller
display
01
02
04
07
/
0C
0D
0E
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）
unit
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