Troubleshooting; Indoor Unit Error Display - North American HVAC MSC-28CRDN1-MN15W Service Manual

9. Troubleshooting

9.1 Indoor Unit Error Display

Display
E0
E1
E3
E5
E6
P0
P1
P3
P4
Note
P3: If the outdoor temperature <= -15 ° C for 1 hour, then the machine stops running, the indoor display
shows the error code "P3". The unit can still receive remote control signals.
If the outdoor >= -12 ° C for 10 minutes, the compressor stops running more than one hour,
Or the outdoor temperature>= 5 ℃ for 10 minutes, then AC will recover to the last mode and fan
speed.
E4 : Reserved function.
LED STATUS
EEPROM parameter error
Indoor / outdoor units communication protection
Indoor fan speed has been out of control
Open circuit or short circuit of outdoor temperature sensor
Open circuit or short circuit of room or evaporator temperature sensor
IPM malfunction or IGBT over-strong current protection
Over voltage or too low voltage protection
Outdoor temperature is lower than 15 ℃ （optional function）
Inverter compressor drive error
40