M thermal Mono
202004 61
4.6 E5, E6, E9, EA Troubleshooting
Digital display output
Description
E5 indicates an air side heat exchanger refrigerant outlet temperature sensor error.
E6 indicates an outdoor ambient temperature sensor error.
E9 indicates a suction pipe temperature sensor error.
EA indicates a discharge temperature sensor error.
M thermal Mono stops running.
Error code is displayed on refrigerant system main control board for refrigerant system and user interface.
Possible causes
Temperature sensor not connected properly or has malfunctioned.
Damaged refrigerant system main PCB.