Trane 4TXK6512G1000AA Service Manual page 176

10.4 4MXD6536G1000AA 4MXD6548G1000AA 4MXD6560G1000AA
LED flash times
Panel
of indoor PCB
display
LED4 LED3
Malfunction of indoor unit ambient
0 1 1
Malfunction of indoor unit piping
0 2 2
0 4 4
7
0 7
/
0 8
0 12 0C
0 13 0D
0 16 10
Note:
1.The outdoor failure can also be indicated by the indoor unit,the checking method as follows: LED4 flash times
represents tens digit, LED3 flash times represents units digit, use the number at tens digit minus 20, then will get
the outdoor error code. For example, if the outdoor error code is 15, LED4 will flash 3 times firstly(30-20=10), two
seconds later, LED3 will flash 5 times. Four seconds later, the process will repeat again.
2.LED4 is a yellow one on the indoor 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.
Malfunction Description
temperature sensor
temperature sensor
EEPROM wrong of indoor PCB
Abnormal communication between
indoor and outdoor units
Abnormal communication between
wired controller and indoor unit
Malfunction of drain system
Zero cross sigal wrong
Indoor abnormal mode operation
Sensor disconnected or broke or at wrong
position or short circuit
Sensor disconnected or broke or at wrong
position or short circuit
EEPROM chip disconnected or broken or
wrong programmed or PCB broken
Wrong connection or the wires be
disconnected or wrong address setting of
indoor unit or faulty power supply or faulty
PCB
Wrong connection or wired controller
or PCB fault
Pump motor disconnected or at wrong
position, or the float switch disconnected or
at wrong position or the short circuit bridge
disconneted
Zero cross sigal detected wrong
Different from outdoor unit mode
144
Possible reasons
broken