Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 - Indoor Unit Error Display Function; Outdoor Unit Error Self-Diagnosis Display

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7.Troubleshooting
7.1 Indoor Unit Error Display Function
LED4 operation LED2 defrosting LED1 timer LED4 auto
LED2
defrost
LED1
Timer
LED3
Auto
LED4
operation
LED STATUS
X X O ☆ Mold protection
O X X ☆ Compressor top protection against temperature
X O X ☆ Open or short circuit of outdoor temperature sensor
X O O ☆ Over load or too low voltage protection
O O O ☆
Room temperature or evaporator temperature sensor open
or short circuit of
O O ☆ ☆ Fan speed beyond control
☆ X O ☆ Zero-crossing examination error
☆ O X ☆ Temperature fuse protection
X X ☆ ☆ EEPROM data error
☆ O X ☆ Types doesn't match
☆ ☆ ☆ ☆ Indoor / outdoor units communication protection
O (on) X (off) ☆ (flash)
7.2.Outdoor Unit Error Self-diagnosis Display
Outdoor Unit Error： if L4 flashes at 1Hz.
Outdoor unit works: L4 on
Outdoor unit Stand by: if L4 flashes at 0.5Hz