YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
YMGI: Your Modern Green Idea
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PROTECTION AND ERROR CODES
Self-Diagnostic Functions
Self-check code of running lights
Digital display self-check code
dF or Heating icon flashes
Fan motor icon does not light up
Room temperature sensor fault
External feedback sensor fault
Outdoor tube temperature sensor fault
EEPROM Communication failure
Outdoor ambient temperature exceeds
units operating range
Note: Above self-diagnostic information is commonly applicable in most air conditioner models, but some units do
have different codes. Please refer to the User’s Manual or contact YMGI for more information
Error Codes Display for Indoor Unit
Indoor Unit Display Status
Running lamp flashing
frequency
Timing lamp flashing
frequency
Communication fault between the
indoor and outdoor units
Indoor ambient temperature sensor fault
Indoor coil temperature sensor fault
(including inlet, middle of pipe and
outlet)
Outdoor ambient temperature sensor
fault
Outdoor coil temperature sensor fault
Compressor suction temperature
sensor fault
Compressor discharge temperature
sensor fault
Current inductor or voltage fault
Abnormal compressor drive fault
Power supply incorrect phase or phase
sequence fault
Gas return sensor fault (includes A, B,
C, D)
Note:
The above error code information is applicable to several models of air conditioners, but because of product changes or
improvements, they can change. Please refer to the User’s Manual for more information, or have a technician contact YMGI.
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