10.2 4MXC6524G1000AA 4MXC6536G1000AA 4MXC6548G1000AA
4MXC6560G1000AA failure code
LED flash times
of indoor PCB
Panel
display
Malfunction Description Possible reasons
LED4 LED1
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
0 8 8 wired controller and indoor unit, or or PCB fault
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 14 0E Indoor unit DC fan motor abnormal 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 follows: If the outdoor
error code is M(DECIMAL), the indoor unit’s display board will show the after converted hexadecimal code of
“M+20“(DECIMAL). For example, if the outdoor error code is 2, the indoor unit display board will show the error
code 16 (2→2+20=22→change decimal 22 to hexadecimal code, get 16)
2.LED4 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.
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