10.4 4MXD6536G1000AA 4MXD6548G1000AA 4MXD6560G1000AA
LED flash times
of indoor PCB
Panel
display
Malfunction Description Possible reasons
LED4 LED3
Malfunction of indoor unit ambient
Sensor disconnected or broke or at wrong
0 1 1 temperature sensor position or short circuit
Malfunction of indoor unit piping
Sensor disconnected or broke or at wrong
0 2 2 temperature sensor position or short circuit
EEPROM chip disconnected or broken or
0 4 4 EEPROM wrong of indoor PCB wrong programmed or PCB broken
Wrong connection or the wires be
7 Abnormal communication between disconnected or wrong address setting of
0 7 indoor and outdoor units indoor unit or faulty power supply or faulty
PCB
/ Abnormal communication between Wrong connection or wired controller
broken
wired controller and indoor unit
Pump motor disconnected or at wrong
position, or the float switch disconnected or
0 12 0C Malfunction of drain system at wrong position or the short circuit bridge
disconneted
0 13 0D Zero cross sigal wrong Zero cross sigal detected wrong
0 16 10 Indoor abnormal mode operation Different from outdoor unit mode
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.
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